Influence of Sediment Condition on Water Quality in the Izarigawa Dam Reservoir

Size: px
Start display at page:

Download "Influence of Sediment Condition on Water Quality in the Izarigawa Dam Reservoir"

Transcription

1 Influence of Sediment Condition on Water Quality in the Izarigawa Dam Reservoir Ken ichi TAKADA, Tetsuya YABIKI, Makoto NAKATSUGAWA, and Yasuhiro MURAKAMI Civil Engineering Research Institute of Hokkaido, Hiragishi 1-jo 3chome, Toyohira-ku, Sapporo, Hokkaido , Japan Abstract: The water environment of dam reservoirs is greatly influenced by sediment inflow from upstream, weather, and hydrological conditions. The Izarigawa Dam was completed in 1980, and sedimentation has been progressing yearly. The volume of accumulated sediment was 840,000 m 3 as of A sediment shelf formed in the dam reservoir has been advancing and it became conspicuous in 1993, when musty odor occurred from the action of actinomycetes. Nearby residents complained about this musty odor. In view of the above, we compiled existing survey data on transitions of sediment accumulation and hydrological and water quantity conditions of the reservoir toward constructing a hydraulic model. Under the assumption that the inflow conditions are constant, this model was used to calculate the hydraulic conditions of water flow before sedimentation (i.e., immediately after dam completion) and after sedimentation. The results show changes in water flow and temperature, which enabled us to clarify the mechanism of musty odor generation. Toward developing countermeasures against musty odor, we will quantify its causal factors. Keywords: Sedimentation, Water quality, Musty odor, Geosmin, Actinomycetes, Hydraulic analysis for the reservoir 1. INTRODUCTION The Izarigawa Dam Reservoir, at the center of Hokkaido, Japan s northernmost major island, is used for flood control and supplies water to approximately 371,000 nearby residents (Figure 1). Dam basin area is 113.3km 2, and Total reservoir capacity is 15,300,000m 3. The Izarigawa-Dam reservoir serves as a source of local water. When the reservoir water level dropped in the summer of 1993, a musty odor occured in the supply water. This odor has returned every year since. Existing survey data on the reservoir s sediment inflow and water environment were reviewed in an attempt to clarify the factors affecting the reservoir s water environment. 2. ANALYSIS ON EXISTING SEDIMENTATION SURVEY RESULTS Figure 2. Secular change in longitudinal reservoir bed contour In the dam reservoir the sediment forms a shelf (Figure 2), with the reservoir bed being relatively shallow at the upstream and middle parts of the reservoir but rapidly deepening immediately upstream of the dam body.. Altitude(m) Izarigawa Dam Figure 1. The position figure of Izarigawa Dam Normal water level E.L m Limited water level E.L m :2000 :1981 : Distance from a dam(m) 1

2 3. CHARACTERISTICS OF SEDIMENTATION IN THE DAM RESERVOIR In 1998, the Ishikari River Development and Construction Department carried out a boring survey (Figure 3) on the reservoir s sediment 1)2). As the figure shows, the sediment that had deposited after the completion of the dam consists of grains that are much finer than those of the original riverbed (Figure 4). Over 90% of the sediment grains measure 1 mm or less in diameter. Also, grains in the lower layer are finer than those in the upper layer. Coarse-grained sediment (diameter 0.1 mm or greater) that flows into the reservoir accumulates near the top of the sediment shelf to form a top-set bed. Fine-grained sediment (diameter less than 0.1 mm) accumulates downstream from the head of the delta (i.e., the front edge of the top-set slope of the advancing sediment shelf) as wash load to form a bottom-set bed. In this sedimentation process, a fore-set bed advances on the bottom-set bed. This is why the sediment in the upper layer is coarse-grained and that in the lower layer is fine-grained 3). 4. SEDIMENT INFLOW SURVEY In 1998, a sediment inflow survey was carried out 1) in the four tributaries entering the dam reservoir (the Rarumanai, Izarigawa, Moichan and Ichankoppe rivers) to reveal sediment transport patterns in these rivers at ordinary and flood levels. Between July and September 1998, seven times surveys were carried out twice at normal water levels, three times during rain, and twice at flood levels. During this period, inflow rates ranged between 3 m 3 /s and 100 m 3 /s (Table 1). Two types of sediment inflow survey were performed: bed load survey, in which sediment flowing near the river bed was measured; and suspended load survey, in which suspended sediment flowing downstream was measured. In the bed load survey, a bed load sampler developed by the Public Works Research Institute was placed at the channel centroid using a truck crane. The sampler was left in place for a fixed period to collect samples that were then measured for (dry) weight and grain density to obtain their volumes. In the suspended load survey, 200 liters of river water was sampled from the channel centroid using a submersible pump hoisted by a truck crane. Samples were manually taken when the rivers were at the ordinary water level. The samples were brought No. Survey date Max.inflow Remarks 1 July 30,10:00-July 31,12: m 3 /s Normal level 2 Aug.16,18:00-Aug.17,0: m 3 /s Raining 3 Aug.20,18:00-Aug.21,0: m 3 /s Normal level 4 Aug.28,10:00-Aug.29,12: m 3 /s Raining 5 Sept.8,11:00-Sept.9,11: m 3 /s Raining 6 Sept.16,3:00-Sep.17,15: m 3 /s Raining 7 Sept.22,18:00-Sept.23,9: m 3 /s Raining 2 Percentage passing(%) Izarigawa River Rarumanai River Moichan River Figure 3. Izarigawa Dam and its environs 1.5 km from the dam body Ichankoppe River Grain size(mm) Figure 4. Sediment grain size distribution in the reservoir and percentage passing Table 1. Sediment inflow survey dates Boring survey spot Sediment inflow survey spot Bed depth 0.00m~0.92m Bed depth 1.00m~1.92m Bed depth 2.00m~2.904m Original riverbed

3 back to the laboratory and left stationary for over 24 hours to allow the suspended load to settle. After the supernatant liquid was removed, the sediment samples were measured for (dry) weight, sediment content rate, and grain density, to obtain volumes of suspended load. Discharge observations were carried out at the same time as the bed and suspended load surveys. 5. SEDIMENTATION BUDGET To estimate the total volume of sediment inflow, the results 1) of the sediment inflow survey described in Section 4 were used to develop regression equations for the relationship between measured discharge Q and bed load L b, and that between measured discharge Q and suspended load L s (Tables 2 and 3) 3). The bed load (L b1-4 (m 3 /s)) and suspended load (L s1-4 (m 3 /s)) of sediment inflow from the four rivers were estimated by substituting q f1-4 (m 3 /s) of the respective rivers into the estimation equations for these loads. Then, the estimated sediment inflows were multiplied by 3,600 to obtain hourly sediment inflows. This process was repeated for every hour of the day, for 365 days of the year, to estimate annual total sediment inflows for each year in each of the four rivers. Then, for each river, L b1-4 and L s1-4 were added to obtain the total sediment inflow into the dam reservoir. The discharges q f1-4 (m 3 /s) that were used to estimate the sediment inflows of the rivers can be described in relation to the inflow into the dam (Table 4). This was intended to allow the discharge of each river to be easily estimated based on the discharge into the reservoir. This is because a water level - discharge (H-Q) equation provides continuous discharge for the Rarumanai and Izarigawa rivers, whereas continuous water level data do not exist for the other two rivers. Figure 5 indicates that over 90% of the total sediment inflow comes from the Rarumanai and Izarigawa rivers and that suspended load accounts for over 99% of the total sediment inflow. From this, it is presumed that most of the total sediment inflow is fine suspended sediment from the Rarumanai and Izarigawa rivers. Figure 6 shows secular changes, from 1981 through 2001, in annual sedimentation at the dam and estimated annual sediment inflow. In 3 Table 2. Suspended load regression equations River Inflow rate Equation (m 3 /s) Rarumanai River Q 7.0m 3 /s Ls 1 = Q f Q>7.0m 3 /s Ls 1 = Q f Izarigawa River Q 10.0m 3 /s Ls 3 = Q f Q>10.0m 3 /s Ls 2 = Q f Ichankoppe River All discharges Ls 5 = Q f Moichan River All discharges Ls 6 = Q f L s (m 3 /s),q(m 3 /s) Table 3. Bed load regression equations (m 3 /s) River Inflow rate Equation Rarumanai River All discharges L b1 = Q 1.22 Izarigawa River All discharges L b2 = Q 4.65 Ichankoppe River All discharges L b3 = Q 1.55 Moichan River All discharges L b4 = Q 1.55 L b (m 3 /s),q(m 3 /s) Table 4. Discharge estimation equations River Equation Rarumanai River q f1 = Q in 1.07 Izarigawa River q f2 = Q in 1.03 Ichankoppe River q f3 = Q in 0.58 Moichan River q f4 = Q in 0.54 Izarigawa River A=40.6km 2 Suspended load 15,803 Bed load 4 Rarumanai River A=42.5km 2 Suspended load 32,144 Bed load 16 (m 3 /s) q f1 ~q f4 (m 3 /s),q in (m 3 /s) Total sediment inflow Suspended load 50,506 Bed load 22 Unit: m 3 /year Izarigawa Dam Moichan River A=8.3km 2 Ichankoppe River Suspended load 2,527 A=13.8km 2 Bed load 2 Suspended load 32 Bed load 0.13 Figure 5. Estimated suspended and bed loads (1998)

4 Sedimentation and sediment inflow(m 3 ) 400, , , , ,000 Annual sedimentation Sediment flushed Suspended load (estimated) Bed load (estimated) Figure 6. Secular changes in annual sedimentation and estimated annual sediment inflow (suspended and bed loads) some of the years covered, the annual sedimentation is zero or negative. This may be partly due to measurement error. The sedimentation and the estimated sediment inflow were on the same order of magnitude, but deviated slightly to greatly in some of the years covered. This may be partly due to void content not being taken into account as well as to possible discharge downstream. However, cross-reference with the results of the sedimentation measurement survey suggests that the general tendencies of the sedimentation budget were verified. 6. SEDIMENTATION AT THE DAM AND ITS IMPACT ON WATER QUALITY Downstream of the Izarigawa Dam, the Ishikari Tobu Regional Water Supply Authority withdraws water and supplies it to the cities of Eniwa, Kita-Hiroshima, Ebetsu and Chitose at a maximum rate of 77,100 m 3 /day. Since 1993, a musty odor in supplied water has returned every summer when the dam reservoir level dropped. The cause of this appears to be actinomycetes, according to the Dam Operation and Management Office 4), Takano et al. 5), and Kobayashi et al. 6). They suspect that actinomycetes propagate upstream of the reservoir, but die in the anaerobic zone at the bed near the dam body. The dead actinomycetes then discharge geosmin. 8/19-9/2 4/28-9/12 7/17-9/4 6/3-9/2 6/26-9/27 6/29-8/21 Figure 7. Secular change in DO and geosmin generation periods at the Izarigawa Dam reservoir (near the dam body, 1996 to 2001) The sediment accumulated in the Izarigawa Dam Reservoir has formed a shelf there. In the center and upstream side of the reservoir, the water is shallow. It is very deep near the dam. Kobayashi et al. 6) proposed measures to improve the water environment in order to prevent the musty odor from occurring. They noted that the lower layer, which tends to become anaerobic, should be maintained in an aerobic environment, that the lower-layer water with musty odor should be discharged, and that the sediment accumulated on the upstream side of the reservoir should be dredged. Figure 7 presents generation periods of DO and geosmin at the dam. The generation period of geosmin is the duration where geosmin is greater than or equal to 5 ng/l, which is the minimum limit of detection. This duration roughly agrees with the duration where DO is smaller than or equal to 3 mg/l (i.e., the lower layer is in an anaerobic state) during summer, which confirms that the present understanding of 4

5 musty odor generation is proper. This section examines water flow in the presence and absence of the sediment shelf in the dam reservoir and how the water flow affects the occurrence of musty odor Outline of a two-dimensional vertical hydraulic model The model employed in numerical analysis was based on a two-dimensional vertical reservoir model developed by the Public Works Research Institute, Ministry of Construction 7). This control-volume model differentiates the reservoir into boxes of downstream and vertical flows (Figure 8). The hydraulic conditions, suspended solid (SS) balance, and heat balance are calculated for those boxes. The basic equations of the model are as follows: (1) Continuity equation of water v + z = 0 (2) Momentum equation Horizontal direction 1 P + u + v = + D t z ρ 0 mx + D z mz z Vertical direction P = ρg or ys ρ gdy y (3) Equation for suspended solid (SS) balance C C C C C + u + ( v + v ) = D + D t 0 cx (4) Equation for water temperature balance + u + v = D Tx t + D x y Ty + y cy ρ 0 H C w Figure 8. Dimensions of the control-volume model Table 5. Notations and units of the basic equations x: axis representing the downstream direction z: axis representing the vertical direction u: flow velocity component in the x direction v: flow velocity component in the z direction ρ 0 : standard density (kg/m 3 ) P: water pressure (kg/ms 2 ) D mx : eddy viscous coefficient in the downstream direction (m 2 /s) D my : eddy viscous coefficient in the vertical direction (m 2 /s) ρ: flowing water density (kg/m 3 ) g: gravitational acceleration (m 2 /s) v 0 : average sedimentation rate of suspended particulate (m/s) D cx : diffusion coefficient of SS in the downstream direction (m 2 /s) D cy : diffusion coefficient of SS in the vertical direction (m 2 /s) T: water temperature ( ) C w : specific heat of water (J/kg ) H: quantity of heat per unit volume and unit time (5) Kinematic conditions of the free water surface h h vs = + us t (6) Equation of water density (ρ) ρ = f ( C, T ) Table 5 gives explanations on notations and their units. 5

6 6-2. Application of the model to the Izarigawa Dam Reservoir To confirm the applicability of the model, we performed calculations for the ten days from July 1, The length of each mesh in the downstream direction was 100 m, and that in the water depth (vertical) direction was 0.5 m (Figure 9). Measured values were assigned to the width of the reservoir. For calculation, we adopted the initial water level of the reservoir measured by the Izarigawa Dam Operation and Management Office. The water temperature and SS were measured at the dam in the vertical direction at noon on July 3. The measured values were assumed to be constant in the horizontal direction. The inflow and discharge volumes measured at the Izarigawa Dam Operation and Management Office were adopted. The volumes of inflow water from the four inflow rivers were estimated from Table 4. Table 6 shows estimation equations for the water temperature of each river, which were formulated from survey data on the relationship between the air temperature and water temperature of each river between 1993 and The SS concentration of the water from each river was calculated from observed discharge data. These data were collected between July 30 and December 3, 1998, and on days with flood in 2003 (August 9, September 13, and October 22). The data on the days with flood were collected only for the Izarigawa and Rarumanai rivers. Table 7 presents estimation equations for SS load of the water from the four inflow rivers. The weather data that were needed for heat balance calculations were air temperature, wind velocity, humidity, solar radiation, and sunshine duration. While the sunshine duration data were collected at the nearby Tomakomai Weather Station, the other data were collected at the Izarigawa Dam Operation and Management Office. The eddy viscosity coefficient in the horizontal direction was given by Richardson s Four-Thirds Law. That in the vertical direction can be calculated using a function of the local Richardson number, which is expressed by the following equation: ( bri) c D mz = aexp + Where a: 1.0 x 10-4 b: 0.5 c: 1.0 x 10-5 Ri: Richardson number Altitude(m) Figure 9. Cross-sectional profile of the Izarigawa Dam Reservoir with meshes 6 Longitudinal distance (m) Table 6. Estimation equations for temperatures of the water from inflow rivers Equation for water River temperature estimation Rarumanai River T W 1 = T A Izarigawa River T W 2 = T A Ichankoppe River T W 3 = T A Moichan River T W 4 = T A T A : Air temperature x=100m z=0.5m Table 7. Estimation equations for SS loads from inflow rivers River Equation for load estimation Rarumanai River Izarigawa River Ichankoppe River Moichan River L: Load (g/s), Q: discharge (m 3 /s) L 1 = Q L 2 = Q L 3 = Q L 4 = Q

7 6-3. Numerical model for water flow and temperature analysis Figure 10 shows calculated and measured values of water temperature at the dam. The calculated results closely reproduce water temperature with respect to elevation above sea level, or in the vertical direction. We assumed that the recreated water flow reproduces the density current. Also, we discuss how changes in the longitudinal cross-sectional profile of the reservoir, for which sedimentation is responsible, affect water flow and temperature. In addition, how changes in water flow and temperature relate to the occurrence of musty odor is discussed. The recent profile (July 2000) was compared with one produced using mesh data compiled from land survey data collected in 1981, when a shelf had not yet formed at the upstream side of the reservoir. The initial conditions of the 1981 profile were the same as those of the recent profile. Elevation(m) At the Izarigawa Dam, July 10, 2000 Water temperature( ) Measured Calculated Figure 10. Comparison of calculated values of water temperature and measurements taken at the dam 6-4. Flow regime difference and musty odor occurrence Figure 11 shows the flow regimes of the longitudinal cross-sectional profiles of the reservoir in 1981 and The water flow in the lower layer is less in the 2000 profile. Figure 12 shows the water temperature in these two profiles. The water temperature in the vertical direction ranges more widely in the 2000 profile. Formation of a shelf at the upstream side induced proliferation of actinomycetes and stagnated water flow in the lower layer at the downstream side, as demonstrated by the calculation results. The anaerobic condition was prolonged, and dead actinomycetes caused the production of geosmin. Therefore, formation of a shelf is assumed to be a cause of musty odor. Figure 11. Longitudinal cross-sectional profiles of the Izarigawa Dam Reservoir in 1981 and 2000 for flow regimes (left: 1981 profile; right: 2000 profile;) Figure 12. Longitudinal cross-sectional profiles of the Izarigawa Dam Reservoir in 1981 and 2000 for water temperature (left: 1981 profile; right: 2000 profile;) 7. CONCLUSION In this research, we studied yearly changes in inflow sediment and water environment in the Izarigawa Dam basin. A two-dimensional vertical model that simulates changes in water flow and 7

8 temperature was constructed and applied to the Izarigawa Dam Reservoir for analysis. Such analysis has indicated that changes in the reservoir bottom profile promote the death of actinomycetes, which creates conditions optimum for the production of geosmin in high concentrations. We will study hydrological conditions (e.g., precipitation and water inflow volume) and land use in the basin upstream of the Izarigawa Dam Reservoir, quantify conditions promoting actinomycetes proliferation and death, and examine other causes of musty odor and countermeasures to them. 8. REFERENCES 1 Hokkaido Development Bureau Ishikarigawa Development and Construction Department (1998): Report on Examination of Measures against Sedimentation in the Izarigawa Dam (in Japanese). 2 Hokkaido Development Bureau Ishikarigawa Development and Construction Department (1998): Report on Survey of the Present Condition of the Izarigawa Dam Reservoir (in Japanese). 3 Sediment and Turbid Water Meeting, New Technology and Energy Subcommittee, Committee of Civil Engineering for Energy Equipment, Japan Society of Civil Engineers (2001): Issues of Sediment in Dam Reservoirs and Turbid Water and Required Efforts. 4 Hokkaido Development Bureau Ishikarigawa Development and Construction Department (1999): Report on Survey of the Water Environment in the Izarigawa Dam Reservoir (in Japanese). 5 Takano, K., Ichikawa, H., Sato, S., Itoh, Y. (1994): Characteristics of Actinomyctes Isolated from Sediment and Surface Water in Dammed up Lake Izarigawa (in Japanese). 6 Kobayashi M., Kano A., Tachibana H., Masuzuka Y., Inazawa Y. (2002): Production of Odorous Substances in the Izarigawa Dam Reservoir (in Japanese). 7 Dam Hydraulic Engineering Research Team, Public Works Research Institute, Ministry of Construction (1987): Numerical Model for Analysis of Cold Turbid Water and Eutrophication (Part 2), p. 443, Document of Public Works Research Institute. 8 Matsuo N., Yamada M., Munemiya I. (1996): Relationship between Freshwater Red Tide and Water Flow Characteristics Upstream from Dam Reservoirs, Proceedings of International Conference on Coastal Engineering, Vol. 40, pp

QUANTITATIVE ANALYSIS OF HYDROLOGIC CYCLE IN COLD SNOWY BASIN

QUANTITATIVE ANALYSIS OF HYDROLOGIC CYCLE IN COLD SNOWY BASIN QUANTITATIVE ANALYSIS OF HYDROLOGIC CYCLE IN COLD SNOWY BASIN Tomohide USUTANI 1 and Makoto NAKATSUGAWA 2 1 Japan Weather Association, Sapporo, Japan 2 Toyohashi Office of River Works, Ministry of Land,

More information

IMPROVEMENT OF DISCHARGE OBSERVATION ACCURACY IN ICE-COVERED RIVERS FOR RIVER MANAGEMENT

IMPROVEMENT OF DISCHARGE OBSERVATION ACCURACY IN ICE-COVERED RIVERS FOR RIVER MANAGEMENT in the Environment: Proceedings of the 16th IAHR International Symposium on Dunedin, New Zealand, 2nd 6th December 2002 International Association of Hydraulic Engineering and Research IMPROVEMENT OF DISCHARGE

More information

B-1. Attachment B-1. Evaluation of AdH Model Simplifications in Conowingo Reservoir Sediment Transport Modeling

B-1. Attachment B-1. Evaluation of AdH Model Simplifications in Conowingo Reservoir Sediment Transport Modeling Attachment B-1 Evaluation of AdH Model Simplifications in Conowingo Reservoir Sediment Transport Modeling 1 October 2012 Lower Susquehanna River Watershed Assessment Evaluation of AdH Model Simplifications

More information

A TIPPING-BUCKET SEDIMENT TRAP FOR CONTINUOUS MONITORING OF SEDIMENT DEPOSITION RATE

A TIPPING-BUCKET SEDIMENT TRAP FOR CONTINUOUS MONITORING OF SEDIMENT DEPOSITION RATE A TIPPING-BUCKET SEDIMENT TRAP FOR CONTINUOUS MONITORING OF SEDIMENT DEPOSITION RATE YASUO NIHEI AND YUICHI IMASHIMIZU Department of Civil Eng., Tokyo University of Science, 2641 Yamazaki, Noda-shi 278-851,

More information

Study on Flushing Mechanism of Dam Reservoir Sedimentation and Recovery of Riffle-Pool in Downstream Reach by a Flushing Bypass Tunnel

Study on Flushing Mechanism of Dam Reservoir Sedimentation and Recovery of Riffle-Pool in Downstream Reach by a Flushing Bypass Tunnel Study on Flushing Mechanism of Dam Reservoir Sedimentation and Recovery of -Pool in Downstream Reach by a Flushing Bypass Tunnel Tomoo Fukuda Department of Science and Engineering, Chuo University, Tokyo,

More information

Large-Scale Sediment Inflow and Bed-Variation from 12th Typhoon (2011) in the Asahi River Basin

Large-Scale Sediment Inflow and Bed-Variation from 12th Typhoon (2011) in the Asahi River Basin ICHE 214, Hamburg - Lehfeldt & Kopmann (eds) - 214 Bundesanstalt für Wasserbau ISBN 978-3-93923-32-8 Large-Scale Sediment Inflow and Bed-Variation from 12th Typhoon (211) in the Asahi River Basin Y. Tsukamoto

More information

Measurements of In Situ Pick-up Rate of Nutrients on Riverbed

Measurements of In Situ Pick-up Rate of Nutrients on Riverbed 1th International Conference on Integrated Diffuse Pollution Management (IWA DIPCON 8). Research Center for Environmental and Hazardous Substance Management (EHSM), Khon Kaen University, Thailand; 5-9

More information

CHANGES IN RIVER BED AROUND THE FUKAWA CONTRACTION AREA BY FLOODS AND CHANNEL IMPROVEMENT WORKS IN THE LOWER TONE RIVER

CHANGES IN RIVER BED AROUND THE FUKAWA CONTRACTION AREA BY FLOODS AND CHANNEL IMPROVEMENT WORKS IN THE LOWER TONE RIVER The 1 th Int. Conf. on Hydroscience and Engineering (ICHE-212), Nov. 4 Nov. 7, Orlando, USA 1 CHANGES IN RIVER BED AROUND THE FUKAWA CONTRACTION AREA BY FLOODS AND CHANNEL IMPROVEMENT WORKS IN THE LOWER

More information

Reactivation of Klingnau reservoir sidearm: Numerical simulation of sediment release downstream

Reactivation of Klingnau reservoir sidearm: Numerical simulation of sediment release downstream River Flow 2014 Schleiss et al. (Eds) 2014 Taylor & Francis Group, London, ISBN 978-1-138-02674-2 Reactivation of Klingnau reservoir sidearm: Numerical simulation of sediment release downstream A. Amini

More information

Technical Memorandum No Sediment Model

Technical Memorandum No Sediment Model Pajaro River Watershed Study in association with Technical Memorandum No. 1.2.9 Sediment Model Task: Development of Sediment Model To: PRWFPA Staff Working Group Prepared by: Gregory Morris and Elsie Parrilla

More information

Calculating the suspended sediment load of the Dez River

Calculating the suspended sediment load of the Dez River Erosion and Sediment Transport Monitoring Programmes in River Basins (Proceedings of the Osio Symposium, August 1992). IAHS Publ. no. 210, 1992. 219 Calculating the suspended sediment load of the Dez River

More information

Strategies for managing sediment in dams. Iwona Conlan Consultant to IKMP, MRCS

Strategies for managing sediment in dams. Iwona Conlan Consultant to IKMP, MRCS Strategies for managing sediment in dams Iwona Conlan Consultant to IKMP, MRCS 1 Sediment trapping by dams Active storage capacity Dead storage coarse material (bed load) Fine materials (suspension) Francis

More information

Tarbela Dam in Pakistan. Case study of reservoir sedimentation

Tarbela Dam in Pakistan. Case study of reservoir sedimentation Tarbela Dam in Pakistan. HR Wallingford, Wallingford, UK Published in the proceedings of River Flow 2012, 5-7 September 2012 Abstract Reservoir sedimentation is a main concern in the Tarbela reservoir

More information

U.S. Army Corps of Engineers Detroit District. Sediment Trap Assessment Saginaw River, Michigan

U.S. Army Corps of Engineers Detroit District. Sediment Trap Assessment Saginaw River, Michigan U.S. Army Corps of Engineers Detroit District December 2001 December 2001 This report has been prepared for USACE, Detroit District by: W.F. BAIRD & ASSOCIATES LTD. 2981 YARMOUTH GREENWAY MADISON, WISCONSIN

More information

Behavior of radioactive cesium accumulation in water bodies in contaminated area by FDNPP accident

Behavior of radioactive cesium accumulation in water bodies in contaminated area by FDNPP accident Behavior of radioactive cesium accumulation in water bodies in contaminated area by FDNPP accident Seiji HAYASHI Center for Regional Environmental Research National Institute for Environmental Studies

More information

SEDIMENT TRANSPORT IN RIVER MOUTH ESTUARY

SEDIMENT TRANSPORT IN RIVER MOUTH ESTUARY SEDIMENT TRANSPORT IN RIVER MOUTH ESTUARY Katsuhide YOKOYAMA, Dr.Eng. dredge Assistant Professor Department of Civil Engineering Tokyo Metropolitan University 1-1 Minami-Osawa Osawa, Hachioji,, Tokyo,

More information

Experimental Study of the Sediment Trap Effect of Steel Grid-Type Sabo Dams

Experimental Study of the Sediment Trap Effect of Steel Grid-Type Sabo Dams Experimental Study of the Sediment Trap Effect of Steel Grid-Type Sabo Dams Teruyoshi TAKAHARA 1 and Kazuki MATSUMURA 1 1 Graduate school of Agriculture, Kyoto Pref. University (1-5 Shimogamonakaragicyo,

More information

EXAMPLES (SEDIMENT TRANSPORT) AUTUMN 2018

EXAMPLES (SEDIMENT TRANSPORT) AUTUMN 2018 EXAMPLES (SEDIMENT TRANSPORT) AUTUMN 2018 Q1. Using Cheng s formula estimate the settling velocity of a sand particle of diameter 1 mm in: (a) air; (b) water. Q2. Find the critical Shields parameter diameter

More information

Modeling of long-term sedimentation in the Osijek port basin

Modeling of long-term sedimentation in the Osijek port basin Water Management and Hydraulic Engineering 2015 Litera Brno, ISBN 978-80-214-5230-5, ISSN 2410-5910 Modeling of long-term sedimentation in the Osijek port basin G. Gilja, N. Kuspilić (Faculty of civil

More information

A distributed runoff model for flood prediction in ungauged basins

A distributed runoff model for flood prediction in ungauged basins Predictions in Ungauged Basins: PUB Kick-off (Proceedings of the PUB Kick-off meeting held in Brasilia, 2 22 November 22). IAHS Publ. 39, 27. 267 A distributed runoff model for flood prediction in ungauged

More information

Sediment Transport Mechanism and Grain Size Distributions in Stony Bed Rivers. S.FUKUOKA 1 and K.OSADA 2

Sediment Transport Mechanism and Grain Size Distributions in Stony Bed Rivers. S.FUKUOKA 1 and K.OSADA 2 Sediment Transport Mechanism and Grain Size Distributions in Stony Bed Rivers S.FUKUOKA 1 and K.OSADA 1 Professor, Research and Development Initiative, Chuo-University, 1-13-7 Kasuga Bunkyo-ku, Tokyo,

More information

Earth Science Chapter 6 Section 2 Review

Earth Science Chapter 6 Section 2 Review Name: Class: Date: Earth Science Chapter 6 Section Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Most streams carry the largest part of their

More information

Evaluation of Deposition Pattern of Wonogiri Reservoir Sedimentation

Evaluation of Deposition Pattern of Wonogiri Reservoir Sedimentation International Journal of Civil & Environmental Engineering IJCEE-IJENS Vol: 15 No: 02 15 Evaluation of Deposition Pattern of Wonogiri Reservoir Sedimentation D.A. Wulandari 1, D. Legono 2 & S. Darsono

More information

Flood Capacity of Shirakawa River at Tatsudajinnnai Area in Kumamoto Prefecture

Flood Capacity of Shirakawa River at Tatsudajinnnai Area in Kumamoto Prefecture International Journal of Economy, Energy and Environment 218; 3(5): 51-57 http://www.sciencepublishinggroup.com/j/ijeee doi: 1.11648/j.ijeee.21835.13 ISSN: 2575-513 (Print); ISSN: 2575-521 (Online) Flood

More information

Dynamics of the Ems Estuary

Dynamics of the Ems Estuary Dynamics of the Ems Estuary Physics of coastal systems Jerker Menninga 0439738 Utrecht University Institute for Marine and Atmospheric research Utrecht Lecturer: Prof. dr. H.E. de Swart Abstract During

More information

How to predict the sedimentological impacts of reservoir operations?

How to predict the sedimentological impacts of reservoir operations? ICSE 212 How to predict the sedimentological impacts of reservoir operations? E. Valette EDF CIH eric.valette@edf.fr M. Jodeau EDF R&D LNHE magali.jodeau@edf.fr Presentation of the numerical code Courlis

More information

DYNAMICS OF FLOOD FLOWS AND BED VARIATIONS IN RIVER SECTIONS REPAIRED TO SHIP-BOTTOM SHAPED CHANNELS FROM COMPOUND CHANNLS

DYNAMICS OF FLOOD FLOWS AND BED VARIATIONS IN RIVER SECTIONS REPAIRED TO SHIP-BOTTOM SHAPED CHANNELS FROM COMPOUND CHANNLS E-proceedings of the 36 th IAHR World Congress DYNAMICS OF FLOOD FLOWS AND BED VARIATIONS IN RIVER SECTIONS REPAIRED TO SHIP-BOTTOM SHAPED CHANNELS FROM COMPOUND CHANNLS TAKUMA SASAKI (1) & SHOJI FUKUOKA

More information

Lower Susquehanna River Integrated Sediment & Nutrient Monitoring Program

Lower Susquehanna River Integrated Sediment & Nutrient Monitoring Program Lower Susquehanna River Integrated Sediment & Nutrient Monitoring Program Presented at the Chesapeake Bay Program Scientific and Technical Advisory Committee (STAC) Workshop January 13, 2016 Background

More information

Annex 29. Sediment Transport with the Danube River Flow and Sedimentation Rates along the Danube- Black Sea Navigation Route

Annex 29. Sediment Transport with the Danube River Flow and Sedimentation Rates along the Danube- Black Sea Navigation Route Annex 29 Sediment Transport with the Danube River Flow and Sedimentation Rates along the Danube- Black Sea Navigation Route The transport of sediments with the Danube River flow is the key factor shaping

More information

EFFECT OF TWO SUCCESIVE CHECK DAMS ON DEBRIS FLOW DEPOSITION

EFFECT OF TWO SUCCESIVE CHECK DAMS ON DEBRIS FLOW DEPOSITION DOI: 10.4408/IJEGE.2011-03.B-116 EFFECT OF TWO SUCCESIVE CHECK DAMS ON DEBRIS FLOW DEPOSITION Farouk Maricar (*), Haruyuki Hashimoto (*), Shinya Ikematsu (*) & Tomohiro Miyoshi (*) (*) Department of Civil

More information

Prediction of landslide-induced debris flow hydrograph: the Atsumari debris flow disaster in Japan

Prediction of landslide-induced debris flow hydrograph: the Atsumari debris flow disaster in Japan Monitoring, Simulation, Prevention and Remediation of Dense and Debris Flows 27 Prediction of landslide-induced debris flow hydrograph: the Atsumari debris flow disaster in Japan H. Takaoka 1, H. Hashimoto

More information

From micro to macro scale the impact on the sediment discharge after construction of the Three Gorges Dam on Yangtze River (Changjiang)

From micro to macro scale the impact on the sediment discharge after construction of the Three Gorges Dam on Yangtze River (Changjiang) From micro to macro scale the impact on the sediment discharge after construction of the Three Gorges Dam on Yangtze River (Changjiang) Aleksandra Dewiszek 9th International SedNet conference Solving societal

More information

Internationales Symposion INTERPRAEVENT 2004 RIVA / TRIENT

Internationales Symposion INTERPRAEVENT 2004 RIVA / TRIENT APPLICATION TO PAST DISASTERS OF A METHOD OF SETTING APPLICATION THE RANGE TO OF PAST DEBRIS DISASTERS FLOW OF DAMAGE A METHOD TO HOUSES OF SETTING THE RANGE OF DEBRIS FLOW DAMAGE TO HOUSES Hideaki Mizuno

More information

Experimental and Theoretical Study on the Optimal Tilt Angle of Photovoltaic Panels

Experimental and Theoretical Study on the Optimal Tilt Angle of Photovoltaic Panels Experimental and Theoretical Study on the Optimal Tilt Angle of Photovoltaic Panels Naihong Shu* 1, Nobuhiro Kameda 2, Yasumitsu Kishida 2 and Hirotora Sonoda 3 1 Graduate School, Kyushu Kyoritsu University,

More information

ES 105 Surface Processes I. Hydrologic cycle A. Distribution % in oceans 2. >3% surface water a. +99% surface water in glaciers b.

ES 105 Surface Processes I. Hydrologic cycle A. Distribution % in oceans 2. >3% surface water a. +99% surface water in glaciers b. ES 105 Surface Processes I. Hydrologic cycle A. Distribution 1. +97% in oceans 2. >3% surface water a. +99% surface water in glaciers b. >1/3% liquid, fresh water in streams and lakes~1/10,000 of water

More information

Countermeasures for Preserving Riverine Tidal Flats in a Ship-Bottom Shaped Channel of the Lower Ota River Floodway

Countermeasures for Preserving Riverine Tidal Flats in a Ship-Bottom Shaped Channel of the Lower Ota River Floodway ICHE 214, Hamburg - Lehfeldt & Kopmann (eds) - 214 Bundesanstalt für Wasserbau ISBN 978-939232-8 Countermeasures for Preserving Riverine Tidal Flats in a Ship-Bottom Shaped Channel of the Lower Ota River

More information

Study on river-discharge measurements with a bottom-mounted ADCP

Study on river-discharge measurements with a bottom-mounted ADCP Study on river-discharge measurements with a bottom-mounted ADCP Y. Nihei & T. Sakai Tokyo University of Science, Dept. of Civil Engineering, Chiba, Japan ABSTRACT: To examine the accuracy of discharge

More information

Appendix O. Sediment Transport Modelling Technical Memorandum

Appendix O. Sediment Transport Modelling Technical Memorandum Appendix O Sediment Transport Modelling Technical Memorandum w w w. b a i r d. c o m Baird o c e a n s engineering l a k e s design r i v e r s science w a t e r s h e d s construction Final Report Don

More information

Growing and decaying processes and resistance of sand waves in the vicinity of the Tone River mouth

Growing and decaying processes and resistance of sand waves in the vicinity of the Tone River mouth Advances in River Sediment Research Fukuoka et al. (eds) 2013 Taylor & Francis Group, London, ISBN 978-1-138-00062-9 Growing and decaying processes and resistance of sand waves in the vicinity of the Tone

More information

Experimental Study on Effect of Houses on Debris-Flow Flooding and Deposition in Debris Flow Fan Areas

Experimental Study on Effect of Houses on Debris-Flow Flooding and Deposition in Debris Flow Fan Areas DATA ACQUISITION AND MODELLING (MONITORING, PROCESSES, TECHNOLOGIES, MODELS) Experimental Study on Effect of Houses on Debris-Flow Flooding and Deposition in Debris Flow Fan Areas Kana Nakatani, Dr. 1

More information

International Journal for Management Science And Technology (IJMST)

International Journal for Management Science And Technology (IJMST) ISSN: 2320-8848 (Online) ISSN: 2321-0362 (Print) International Journal for Management Science And Technology (IJMST) Volume 3; Issue 6 Manuscript- 1 SUSPENDED SEDIMENT TRANSPORT FORMULA FOR THE UPSTREAM

More information

EFFICIENCY OF THE INTEGRATED RESERVOIR OPERATION FOR FLOOD CONTROL IN THE UPPER TONE RIVER OF JAPAN CONSIDERING SPATIAL DISTRIBUTION OF RAINFALL

EFFICIENCY OF THE INTEGRATED RESERVOIR OPERATION FOR FLOOD CONTROL IN THE UPPER TONE RIVER OF JAPAN CONSIDERING SPATIAL DISTRIBUTION OF RAINFALL EFFICIENCY OF THE INTEGRATED RESERVOIR OPERATION FOR FLOOD CONTROL IN THE UPPER TONE RIVER OF JAPAN CONSIDERING SPATIAL DISTRIBUTION OF RAINFALL Dawen YANG, Eik Chay LOW and Toshio KOIKE Department of

More information

Appendix G.19 Hatch Report Pacific NorthWest LNG Lelu Island LNG Maintenance Dredging at the Materials Offloading Facility

Appendix G.19 Hatch Report Pacific NorthWest LNG Lelu Island LNG Maintenance Dredging at the Materials Offloading Facility Appendix G.19 Hatch Report Pacific NorthWest LNG Lelu Island LNG Maintenance Dredging at the Materials Offloading Facility Project Memo H345670 To: Capt. David Kyle From: O. Sayao/L. Absalonsen December

More information

Surface Processes Focus on Mass Wasting (Chapter 10)

Surface Processes Focus on Mass Wasting (Chapter 10) Surface Processes Focus on Mass Wasting (Chapter 10) 1. What is the distinction between weathering, mass wasting, and erosion? 2. What is the controlling force in mass wasting? What force provides resistance?

More information

3/3/2013. The hydro cycle water returns from the sea. All "toilet to tap." Introduction to Environmental Geology, 5e

3/3/2013. The hydro cycle water returns from the sea. All toilet to tap. Introduction to Environmental Geology, 5e Introduction to Environmental Geology, 5e Running Water: summary in haiku form Edward A. Keller Chapter 9 Rivers and Flooding Lecture Presentation prepared by X. Mara Chen, Salisbury University The hydro

More information

Technical Review of Pak Beng Hydropower Project (1) Hydrology & Hydraulics and (2) Sediment Transport & River Morphology

Technical Review of Pak Beng Hydropower Project (1) Hydrology & Hydraulics and (2) Sediment Transport & River Morphology Technical Review of Pak Beng Hydropower Project (1) Hydrology & Hydraulics and (2) Sediment Transport & River Morphology The 2 nd Regional Stakeholder Forum The Pak Beng Hydropower Project 5 th May 2017

More information

STREAM SYSTEMS and FLOODS

STREAM SYSTEMS and FLOODS STREAM SYSTEMS and FLOODS The Hydrologic Cycle Precipitation Evaporation Infiltration Runoff Transpiration Earth s Water and the Hydrologic Cycle The Hydrologic Cycle The Hydrologic Cycle Oceans not filling

More information

Precipitation Evaporation Infiltration Earth s Water and the Hydrologic Cycle. Runoff Transpiration

Precipitation Evaporation Infiltration Earth s Water and the Hydrologic Cycle. Runoff Transpiration STREAM SYSTEMS and FLOODS The Hydrologic Cycle Precipitation Evaporation Infiltration Earth s Water and the Hydrologic Cycle Runoff Transpiration The Hydrologic Cycle The Hydrologic Cycle Oceans not filling

More information

Sediment Traps. CAG Meeting May 21, 2012

Sediment Traps. CAG Meeting May 21, 2012 Sediment Traps CAG Meeting May 21, 2012 Agenda Background Fundamentals of Sediment Transport Sediment Trap Existing Information Next Steps 2 The Site Saginaw River 22 mile river beginning at confluence

More information

27. Running Water I (p ; )

27. Running Water I (p ; ) 27. Running Water I (p. 424-436; 440-444) Hydrosphere How much of the Earth s surface is covered by water? Earth's water is collectively called the and is stored in a number of so-called as follows: 1.

More information

Subcommittee on Sedimentation Draft Sediment Analysis Guidelines for Dam Removal

Subcommittee on Sedimentation Draft Sediment Analysis Guidelines for Dam Removal Subcommittee on Sedimentation Draft Sediment Analysis Guidelines for Dam Removal August 4, 2011 Jennifer Bountry, M.S., P.E. Tim Randle, M.S., P.E., D.WRE. Blair Greimann, Ph.D., P.E. Sedimentation and

More information

State Water Survey Division SURFACE WATER SECTION

State Water Survey Division SURFACE WATER SECTION State Water Survey Division SURFACE WATER SECTION AT THE UNIVERSITY OF ILLINOIS Illinois Department of Energy and Natural Resources SWS Miscellaneous Publication 88 SEDIMENTATION OF POOL 19 ON THE MISSISSIPPI

More information

Estimation of Bed Load Transport in River Omi, South Western Nigeria using Grain Size Distribution Data

Estimation of Bed Load Transport in River Omi, South Western Nigeria using Grain Size Distribution Data International Journal of Engineering and Technology Volume 2 No. 9, September, 2012 Estimation of Bed Load Transport in River Omi, South Western Nigeria using Grain Size Distribution Data A.A. Adegbola

More information

Applying Gerris to Mixing and Sedimentation in Estuaries

Applying Gerris to Mixing and Sedimentation in Estuaries Applying Gerris to Mixing and Sedimentation in Estuaries Timothy R. Keen U.S. Naval Research Laboratory Stennis Space Center, Mississippi, U.S.A. 4 July 2011 Université Pierre et Marie Curie Paris, France

More information

SPECIFIC DEGRADATION AND RESERVOIR SEDIMENTATION. By Renee Vandermause & Chun-Yao Yang

SPECIFIC DEGRADATION AND RESERVOIR SEDIMENTATION. By Renee Vandermause & Chun-Yao Yang SPECIFIC DEGRADATION AND RESERVOIR SEDIMENTATION By Renee Vandermause & Chun-Yao Yang Outline Sediment Degradation - Erosion vs Sediment Yield - Sediment Yield - Methods for estimation - Defining Sediment

More information

Geomorphology Geology 450/750 Spring Fluvial Processes Project Analysis of Redwood Creek Field Data Due Wednesday, May 26

Geomorphology Geology 450/750 Spring Fluvial Processes Project Analysis of Redwood Creek Field Data Due Wednesday, May 26 Geomorphology Geology 450/750 Spring 2004 Fluvial Processes Project Analysis of Redwood Creek Field Data Due Wednesday, May 26 This exercise is intended to give you experience using field data you collected

More information

Lecture Outlines PowerPoint. Chapter 5 Earth Science 11e Tarbuck/Lutgens

Lecture Outlines PowerPoint. Chapter 5 Earth Science 11e Tarbuck/Lutgens Lecture Outlines PowerPoint Chapter 5 Earth Science 11e Tarbuck/Lutgens 2006 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors

More information

GEOMORPHIC CHANGES OF A LANDSLIDE DAM BY OVERTOPPING EROSION

GEOMORPHIC CHANGES OF A LANDSLIDE DAM BY OVERTOPPING EROSION DOI: 10.4408/IJEGE.2011-03.B-087 GEOMORPHIC CHANGES OF A LANDSLIDE DAM BY OVERTOPPING EROSION K. Yoshino (*), T. Uchida (*), T. shimizu (*) & K. Tamura (*) (*) Incorporated Administrative Agency, Public

More information

Towards the design of a strategy for sampling suspended sediments in small headwater catchments

Towards the design of a strategy for sampling suspended sediments in small headwater catchments Erosion and Sediment Transport Monitoring Programmes in River Basins (Proceedings of the Oslo»,» Symposium, August 1992). IAHS Publ. no. 210, 1992. 225 Towards the design of a strategy for sampling suspended

More information

Deposition and Resuspension of Sediments in Near Bank Water Zones of the River Elbe

Deposition and Resuspension of Sediments in Near Bank Water Zones of the River Elbe 9th International Congress on Environmental Modelling and Software Brigham Young University BYU ScholarsArchive 4th International Congress on Environmental Modelling and Software - Barcelona, Catalonia,

More information

8 Current Issues and Research on Sediment Movement in the River Catchments of Japan

8 Current Issues and Research on Sediment Movement in the River Catchments of Japan 8 Current Issues and Research on Sediment Movement in the River Catchments of Japan YUTAKA ICHIKAWA INTRODUCTION Prediction of sediment movement is one of the challenging tasks in water-related research.

More information

Groundwater dynamics and surface water-groundwater interaction in a prograding delta island, Louisiana, USA

Groundwater dynamics and surface water-groundwater interaction in a prograding delta island, Louisiana, USA Supplementary Information Groundwater dynamics and surface water-groundwater interaction in a prograding delta island, Louisiana, USA Michael T. O Connor 1* and Kevan B. Moffett 1,2 1 Department of Geological

More information

The Geographical features of the Hiroshima landslide disaster triggered by heavy rainfall on August 20, 2014

The Geographical features of the Hiroshima landslide disaster triggered by heavy rainfall on August 20, 2014 The Geographical features of the Hiroshima landslide disaster triggered by heavy rainfall on August 20, 2014 Shoji DOSHIDA (1) and Kiminori ARAIBA (1) (1) National Research Institute of Fire and Disaster,

More information

Evaluation of flood discharge hydrographs and bed variations in a channel network on the Ota River delta, Japan

Evaluation of flood discharge hydrographs and bed variations in a channel network on the Ota River delta, Japan 3 Floods: From Risk to Opportunity (IAHS Publ. 357, 3). Evaluation of flood discharge hydrographs and bed variations in a channel network on the Ota River delta, Japan T. GOTOH, S. FUKUOKA & R. TANAKA

More information

GEOL 1121 Earth Processes and Environments

GEOL 1121 Earth Processes and Environments GEOL 1121 Earth Processes and Environments Wondwosen Seyoum Department of Geology University of Georgia e-mail: seyoum@uga.edu G/G Bldg., Rm. No. 122 Seyoum, 2015 Chapter 6 Streams and Flooding Seyoum,

More information

Technical Memorandum

Technical Memorandum 2855 Telegraph Avenue, Suite 4, Berkeley, CA 9475, Phone (51) 848-898, Fax (51) 848-8398 Technical Memorandum Date: September 6, 27 To: Mr. Michael Bowen, Project Manager From: Yantao Cui, Ph.D., Hydraulic

More information

Numerical modeling of sediment flushing from Lewis and Clark Lake

Numerical modeling of sediment flushing from Lewis and Clark Lake University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln US Army Research U.S. Department of Defense 2013 Numerical modeling of sediment flushing from Lewis and Clark Lake Jungkyu

More information

DRAFT LOW FLOW CONVEYANCE CHANNEL BORAMEP TOTAL LOAD ANALYSIS 2001 MIDDLE RIO GRANDE, NEW MEXICO MAY 2005

DRAFT LOW FLOW CONVEYANCE CHANNEL BORAMEP TOTAL LOAD ANALYSIS 2001 MIDDLE RIO GRANDE, NEW MEXICO MAY 2005 LOW FLOW CONVEYANCE CHANNEL BORAMEP TOTAL LOAD ANALYSIS 2001 MIDDLE RIO GRANDE, NEW MEXICO MAY 2005 PREPARED FOR: US BUREAU OF RECLAMATION ALBUQUERQUE, NEW MEXICO PREPARED BY: FORREST JAY JASON ALBERT

More information

HYDRAULIC STRUCTURES, EQUIPMENT AND WATER DATA ACQUISITION SYSTEMS - Vol. I - Hydraulics of Two-Phase Flow: Water and Sediment - G R Basson

HYDRAULIC STRUCTURES, EQUIPMENT AND WATER DATA ACQUISITION SYSTEMS - Vol. I - Hydraulics of Two-Phase Flow: Water and Sediment - G R Basson HYDRAULICS OF TWO-PHASE FLOWS: WATER AND SEDIMENT G R Basson Dept. of Civil Engineering, University of Stellenbosch, South Africa. Keywords: sediment, sediment transport, turbulence, river regime, stream

More information

Development of Weather Characteristics Analysis System for Dam Construction Area

Development of Weather Characteristics Analysis System for Dam Construction Area Development of Weather Characteristics Analysis System for Dam Construction Area Yong-Moon Jung Jae-Chung Park* Bo-Seung Kang Sang-Jin Song Boo-Hyun Kwon Water Resources Business Dept., K-water, Daejeon,

More information

EFFECT OF ICE ON WATER FLOW AT SALOMA LAGOON

EFFECT OF ICE ON WATER FLOW AT SALOMA LAGOON Ice in the Environment: Proceedings of the 16th IAHR International Symposium on Ice Dunedin, New Zealand, 2nd 6th December 22 International Association of Hydraulic Engineering and Research EFFECT OF ICE

More information

6.1 Water. The Water Cycle

6.1 Water. The Water Cycle 6.1 Water The Water Cycle Water constantly moves among the oceans, the atmosphere, the solid Earth, and the biosphere. This unending circulation of Earth s water supply is the water cycle. The Water Cycle

More information

Sediment Transport, Numerical Modeling and Reservoir Management some Concepts and Applications

Sediment Transport, Numerical Modeling and Reservoir Management some Concepts and Applications Sediment Transport, Numerical Modeling and Reservoir Management some Concepts and Applications CEMRACS 2013 August 6 th Magali Jodeau EDF R&D LNHE magali.jodeau@edf.fr Overview of the presentation What

More information

Surface Water Short Study Guide

Surface Water Short Study Guide Name: Class: Date: Surface Water Short Study Guide Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. The three ways in which a stream carries

More information

SEDIMENTATION AND ITS COUNTERMEASURE AT THE OFF-TAKE AREA OF NEW DHALESWARI RIVER

SEDIMENTATION AND ITS COUNTERMEASURE AT THE OFF-TAKE AREA OF NEW DHALESWARI RIVER SEDIMENTATION AND ITS COUNTERMEASURE AT THE OFF-TAKE AREA OF NEW DHALESWARI RIVER Tanjir Saif AHMED* MEE15634 Supervisors: Prof. EGASHIRA Shinji** Assoc. Prof. YOROZUYA Atsuhiro*** ABSTRACT Present study

More information

Transactions on Engineering Sciences vol 18, 1998 WIT Press, ISSN

Transactions on Engineering Sciences vol 18, 1998 WIT Press,   ISSN Simulation of natural convection in a reservoir P. Jelmek*, V. Havlik\ R. Cerny\ P. Pfikryl" * Czech Technical University, Faculty of Civil Engineering, Department of Physics, Thdkurova 7, 166 29 Prague

More information

ESTIMATION OF MORPHOLOGICAL IMPACT OF GROYNE LENGTHENING I. RÁTKY, ÉVA RÁTKY

ESTIMATION OF MORPHOLOGICAL IMPACT OF GROYNE LENGTHENING I. RÁTKY, ÉVA RÁTKY ESTIMATION OF MORPHOLOGICAL IMPACT OF GROYNE LENGTHENING I. RÁTKY, ÉVA RÁTKY Abstract. Hydraulic-morphological calculations in open channel flows still cause problems for modellers, partially because of

More information

Stop 1: Marmot Dam Stop 1: Marmot Dam

Stop 1: Marmot Dam Stop 1: Marmot Dam Stop 1: Marmot Dam Stop 1: Marmot Dam Following the removal of Marmot Dam in 2007, the fate of the reservoir sediments has been monitored through a series of surveys and sediment transport measurements.

More information

A DYNAMIC INTERPOLATION AND EXTRAPOLATION METHOD TO EVALUATE CROSS-SECTIONAL VELOCITY FROM POINT VELOCITY

A DYNAMIC INTERPOLATION AND EXTRAPOLATION METHOD TO EVALUATE CROSS-SECTIONAL VELOCITY FROM POINT VELOCITY A DYNAMIC INTERPOLATION AND EXTRAPOLATION METHOD TO EVALUATE CROSS-SECTIONAL VELOCITY FROM POINT VELOCITY J. KASHIWADA, 1 Y. NIHEI, 2 E. TAKASHIMA, 3 Y. YAMASAKI, 4 and M. ICHIYAMA 5 1 Engineer, River

More information

Which particle of quartz shows evidence of being transported the farthest distance by the stream? A) B) C) D)

Which particle of quartz shows evidence of being transported the farthest distance by the stream? A) B) C) D) 1. Base your answer to the following question on the block diagram below, which represents the landscape features associated with a meandering stream. WX is the location of a cross section. Location A

More information

CASE STUDY BINGA, PHILIPPINES

CASE STUDY BINGA, PHILIPPINES SEDIMENT MANAGEMENT CASE STUDY BINGA, PHILIPPINES Key project features Name: Binga Country: Philippines Category: modify operating rule (focus or redistribute sediment); adaptive strategies Reservoir volume

More information

Sediment trapping efficiency of modular steel check dam in laboratory experiment and field observation

Sediment trapping efficiency of modular steel check dam in laboratory experiment and field observation Sediment trapping efficiency of modular steel check dam in laboratory experiment and field observation Su-Chin CHEN 1, Hiroshi KOKURYO 2, Shuan-Pei AN 1, Sheng-Jui LU 1, and Hui-Kai HUANG 1* 1 Department

More information

Proceedings, International Snow Science Workshop, Banff, 2014

Proceedings, International Snow Science Workshop, Banff, 2014 CHANGES IN DESIGN STANDARDS AND REGIONAL CHARACTERISTICS OF AVALANCHE SUPPORTING STRUCTURES IN JAPAN Yusuke Harada 1 *, Hiroki Matsushita and Masaru Matsuzawa 1 1 Civil Engineering Research Institute for

More information

WATER INJECTION DREDGING by L.C. van Rijn

WATER INJECTION DREDGING by L.C. van Rijn WATER INJECTION DREDGING by L.C. van Rijn (info@leovanrijn-sediment.com) Description of method Almost all harbour basins suffer from the problem of siltation of sediments. Usually, the deposited materials

More information

Illinois State Water Survey Division

Illinois State Water Survey Division Illinois State Water Survey Division SURFACE WATER SECTION SWS Miscellaneous Publication 108 SEDIMENT YIELD AND ACCUMULATION IN THE LOWER CACHE RIVER by Misganaw Demissie Champaign, Illinois June 1989

More information

Running Water Earth - Chapter 16 Stan Hatfield Southwestern Illinois College

Running Water Earth - Chapter 16 Stan Hatfield Southwestern Illinois College Running Water Earth - Chapter 16 Stan Hatfield Southwestern Illinois College Hydrologic Cycle The hydrologic cycle is a summary of the circulation of Earth s water supply. Processes involved in the hydrologic

More information

National Hydrology committee of Afghanistan (NHCA) Sedimentation in Reservoire

National Hydrology committee of Afghanistan (NHCA) Sedimentation in Reservoire National Hydrology committee of Afghanistan (NHCA) Sedimentation in Reservoire OCt.2007 Prof. Mohammad Qasem Seddeqy KPU بسم االله الرحمن الرحيم وجعلنامن الماءکل شي ء حی 30 واز ا ب هر چيزی رازنده گردانيدیم

More information

Annual transport rates at two locations on the fore-slope.

Annual transport rates at two locations on the fore-slope. Sediment Transport by Currents Fore-slope Sediment transport rates and sediment concentrations were computed from the hydrodynamic model runs as well as from direct measurements of current velocities at

More information

A Report on a Statistical Model to Forecast Seasonal Inflows to Cowichan Lake

A Report on a Statistical Model to Forecast Seasonal Inflows to Cowichan Lake A Report on a Statistical Model to Forecast Seasonal Inflows to Cowichan Lake Prepared by: Allan Chapman, MSc, PGeo Hydrologist, Chapman Geoscience Ltd., and Former Head, BC River Forecast Centre Victoria

More information

Investigation on Dynamics of Sediment and Water Flow in a Sand Trap

Investigation on Dynamics of Sediment and Water Flow in a Sand Trap Investigation on Dynamics of Sediment and Water Flow in a Sand Trap M. R. Mustafa Department of Civil Engineering Universiti Teknologi Petronas 31750 Tronoh, Perak, Malaysia R. B. Rezaur Water Resources

More information

Brief outline of the presentation

Brief outline of the presentation EGS AGU - EUG Joint Assembly, Nice, France, April 2003 Session HS9 - Sediment dynamics and channel change in rivers and estuaries Channel change and sediment movement after a major level drawdown at Kremasta

More information

Technical Memorandum No

Technical Memorandum No Pajaro River Watershed Study in association with Technical Memorandum No. 1.2.10 Task: Evaluation of Four Watershed Conditions - Sediment To: PRWFPA Staff Working Group Prepared by: Gregory Morris and

More information

1. Evaluation of Flow Regime in the Upper Reaches of Streams Using the Stochastic Flow Duration Curve

1. Evaluation of Flow Regime in the Upper Reaches of Streams Using the Stochastic Flow Duration Curve 1. Evaluation of Flow Regime in the Upper Reaches of Streams Using the Stochastic Flow Duration Curve Hironobu SUGIYAMA 1 ABSTRACT A stochastic estimation of drought evaluation in the upper reaches of

More information

mountain rivers fixed channel boundaries (bedrock banks and bed) high transport capacity low storage input output

mountain rivers fixed channel boundaries (bedrock banks and bed) high transport capacity low storage input output mountain rivers fixed channel boundaries (bedrock banks and bed) high transport capacity low storage input output strong interaction between streams & hillslopes Sediment Budgets for Mountain Rivers Little

More information

Experimental Investigation on Density Currents Propagating over Smooth and Rough Beds

Experimental Investigation on Density Currents Propagating over Smooth and Rough Beds Experimental Investigation on Density Currents Propagating over Smooth and Rough Beds Reza Nasrollahpour 1, Mohamad Hidayat Bin Jamal 2*, Mehdi Ghomeshi 3, Peiman Roushenas 4 1,2,4 Faculty of Civil Engineering,

More information

Summary. Streams and Drainage Systems

Summary. Streams and Drainage Systems Streams and Drainage Systems Summary Streams are part of the hydrologic cycle and the chief means by which water returns from the land to the sea. They help shape the Earth s surface and transport sediment

More information

RESERVOIR SEDIMENTATION MANAGEMENT WITH BYPASS TUNNELS IN JAPAN. Keywords: Reservoir sedimentation, Sediment bypass, Diversion tunnel, Abrasion damage

RESERVOIR SEDIMENTATION MANAGEMENT WITH BYPASS TUNNELS IN JAPAN. Keywords: Reservoir sedimentation, Sediment bypass, Diversion tunnel, Abrasion damage Proceedings of the Ninth International Symposium on River Sedimentation October 18 21, 2004, Yichang, China RESERVOIR SEDIMENTATION MANAGEMENT WITH BYPASS TUNNELS IN JAPAN Tetsuya SUMI Graduate School

More information

Impact assessment on disasters

Impact assessment on disasters The 5th International Coordination Group (ICG) Meeting GEOSS Asian Water Cycle Initiative (AWCI), Dec. 16, 2009. Impact assessment on disasters Eiichi Nakakita Disaster Prevention Research Institute Kyoto

More information

Upgrading Feasibility Study on the Upper Seti Storage Hydroelectric Project in Nepal

Upgrading Feasibility Study on the Upper Seti Storage Hydroelectric Project in Nepal 6.5 Evaporation Evaporation is measured at No. 815 meteorological station, EL. 5 m, in the Seti River basin. The average monthly evaporation from 1977 to 1997 is as shown in Table 6.5-1. Table 6.5-1 Average

More information

PRELIMINARY DRAFT FOR DISCUSSION PURPOSES

PRELIMINARY DRAFT FOR DISCUSSION PURPOSES Memorandum To: David Thompson From: John Haapala CC: Dan McDonald Bob Montgomery Date: February 24, 2003 File #: 1003551 Re: Lake Wenatchee Historic Water Levels, Operation Model, and Flood Operation This

More information