MISSION CREEK WATERSHED (2002 Report Year 4)

Transcription

1 Stream Channel Monitoring Program for the MISSION CREEK WATERSHED (2002 Report Year 4) (Penticton Forest District) Prepared for RIVERSIDE FOREST PRODUCTS LTD. Prepared by DOBSON ENGINEERING LTD. #4, 1960 Springfield Road Kelowna, BC V1Y 5V7 March 2003

2 Mission Creek/Channel Monitoring Program - Year 4 i Table of Contents 1.0 INTRODUCTION METHODS MONITORING SUMMARY HYDROMETRIC DATA FOREST DEVELOPMENT CONCLUSIONS RECOMMENDATIONS... 6 File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

3 Mission Creek/Channel Monitoring Program - Year 4 ii Tables Table 1 Average Channel Dimensions ( ) Table 2 Particle Size Distribution ( ) Table 3 Maximum Daily Discharge at Mission Creek Near East Kelowna WSC Stn. #08NM134 ( ) File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

4 Mission Creek/Channel Monitoring Program - Year 4 iii APPENDICES APPENDIX A Channel Monitoring Procedures APPENDIX B Hydrometric Data File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

5 Stream Channel Monitoring Summary for the MISSION CREEK WATERSHED (2002 Report - Year 4) (Penticton Forest District) 1.0 INTRODUCTION The intent of the channel monitoring program is to help quantify channel change over time and to determine the potential effects future forest development might have on stream channels. The monitoring program is designed to help guide future management decisions within the watershed and the results of this program are intended to compliment other watershed research and restoration efforts including the Watershed Assessment Procedure, Channel Assessment Procedure, and Watershed Restoration Program. Forest Renewal British Columbia (FRBC) funded this project from , however, the funding for 2002 was provided by the Forest Investment Account (FIA). Five permanent channel monitoring sites and two photo monitoring sites were established in the Mission Creek watershed in Two channel monitoring sites are located on Mission Creek (one upstream from Fish Hawk Creek and one upstream from Pearson Creek). Three other sites are located on tributaries to Mission Creek (one on Fish Hawk Creek, one on Pearson Creek and one on Belgo Creek). The two photo sites are located on Lees Creek and Unnamed Creek [refer to site map and location descriptions]. Annual site assessments have been conducted from The channel monitoring data collected to date can serve as baseline information that future channel conditions can be compared against. Future channel monitoring surveys should be conducted if there are significant changes in watershed conditions (extensive forest development, wildfire, extreme peak flow conditions, etc.). 2.0 METHODS Each monitoring site was established according to the procedures outlined in Appendix A. Data from each site includes a plan diagram, representative site photographs, a channel measurement summary sheet, a grain size distribution chart and cross section plots. Pebble count data (grain size distribution data) was not collected in 2002 due to stream bed ice formation. Data collected at Mission Creek above Fish Hawk Creek and at Fish Hawk Creek was limited to photographs only as the channel was frozen over. File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

6 Mission Creek/Channel Monitoring Program - Year 4 Page MONITORING SUMMARY Channel monitoring fieldwork is typically conducted during late summer or early fall. In 2002, with the change in funding sources, approval to proceed with this project was delayed until mid fall, which delayed the fieldwork start date. In October and November of 2002 the seven channel monitoring sites in the Mission Creek Watershed were re-assessed. The 2001 monitoring report recommended that future channel monitoring only be completed when significant annual peak flows occur (>5 year events) or when other significant watershed conditions exist. Although the 2002 peak flow in Mission Creek was a 4 year event, the channel monitoring update was still conducted. Dobson Engineering Ltd. staff was aware that several streams in the Okanagan with similar peak flow magnitudes, experienced channel changes. This prompted the channel monitoring work on Mission Creek to continue in 2002 to identify what physical channel changes may have occurred. The effects that annual peak flows have on the streams are better understood when overview field observations are made during the peak flow period. This report includes only the 2002 photographs; the photographs from are in the previous annual reports. The 2002 data set (stream cross sections only) has been plotted with the 2000 and 2001 data sets. In 1999 a less quantitative survey methodology was used therefore detailed cross-sections for 1999 are not available. Refer to the following paragraphs as well as Tables 1 and 2 for site specific channel information. Mission Creek above Fish Hawk Creek Collecting detailed stream measurements at this site was not feasible because the creek was frozen, however, photographs were taken at this site. Although the channel was frozen over, visual observations do not indicate any significant channel changes. Based on field observations and the photographs, the channel bed, banks and LWD all remain stable. Fish Hawk Creek The creek at this site was frozen as well, and detailed field measurements were not collected. As in past years, the several small slope failures on the right bank are continuing to erode and are depositing fine sediment into the creek. No significant change in channel morphology was noted during the field visit or in a photo comparison, however due to the eroding bank failures, this channel section remains unstable. Mission Creek above Pearson Creek Bank erosion has not increased dramatically at this site since As noted in the 2001 update report, sand and small gravel sized particles appear to be flushed through the system, while small cobble material appears to be deposited at this site. Subtle changes in LWD formations upstream from the site are possibly releasing sediment, which is transported into File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

7 Mission Creek/Channel Monitoring Program - Year 4 Page 3 the study site. As a result of the infilling the W/D ratio has been increasing since Channel conditions at this site remain dynamic, however, continued vegetation growth on the mid channel islands will improve channel stability. Pearson Creek Continued LWD and bedload movement and minor bank erosion are still evident at this site. This channel section remains dynamic and slightly disturbed. Belgo Creek Overall, this channel section remains stable. The bankfull width at cross section 5 increased by 15cm in Small cobble material has eroded from the bank, and does not constitute a significant channel change, as the erosion is limited to this cross section. Additional LWD has accumulated at the jam at cross section 1 and the new side channel is expanding along the right side of the debris jam, downstream from the study site. Lees Creek and Un-named Creek These two sites are photograph-only sites. Based on the visual observations only, these two sites have remained stable from The following tables provide a summary of the channel and streambed particle size measurements. Bankfull Measurements *Width (m) *Depth (m) *Area (m2) W/D Ratio Table 1 Average Channel Dimensions ( ) Mission Creek above Fish Hawk Fish Hawk Creek Mission Creek above Pearson Pearson Creek Belgo Creek *Each of the values reported are derived from the average measurements from each survey site. See also the cross sectional data and plots for each site in this report. File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

8 Mission Creek/Channel Monitoring Program - Year 4 Page 4 *D16 (mm) *D50 (mm) *D84 (mm) Mission Creek above Fish Hawk Table 2 Particle Size Distribution ( ) Fish Hawk Creek Mission Creek above Pearson Pearson Creek Belgo Creek *Additional details on D16, D50 and D84 are provided in the procedures section of this report. See also the particle size distribution plots for each site in this report data was not collected due to stream bed ice formation. 4.0 HYDROMETRIC DATA The Water Survey of Canada (WSC) collects discharge data at Mission Creek Near East Kelowna (WSC Station #08NM116). Channel monitoring visits were conducted from ; discharge data for Mission Creek during this time is presented in Table 3 (refer to Appendix B for the entire data set). Table 3 Maximum Daily Discharge at Mission Creek Near East Kelowna WSC Stn. #08NM134 ( ) Year Maximum Daily Discharge Return Period m 3 /s 2 year m 3 /s 3 year m 3 /s 1 year m 3 /s 4 year Based on the 50 years of data, the mean maximum daily discharge at Mission Creek is 51 m 3 /s, which equates to a 2-year return period. Since 1999, no significant channel changes have occurred at any of the sites, therefore based on the above return periods, flows with less than 5-year return periods are not likely to cause channel changes. File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

9 Mission Creek/Channel Monitoring Program - Year 4 Page FOREST DEVELOPMENT In 2001/2002, Dobson Engineering Ltd completed an update Interior Watershed Assessment Procedure (IWAP) report for the Mission Creek Watershed. The report states, A total of ha of timber are proposed for harvest in the Mission Creek watershed during the period of 2002 to 2007 representing 5.3% of the watershed area. The blocks are generally well distributed between all of the sub-basins. The report also suggests that proposed forest development is unlikely to affect channel stability, as the proposed development is well removed from the channel system. Equivalent clear-cut areas (ECA s) in the majority of sub-basins are forecast to increase only slightly from , and all the sub-basin ECA s will remain below 20%, which is considered low. The study basin with the largest ECA increase is Pearson Creek, which is forecast to increase from 12.2% in 2001 to 15.4% in CONCLUSIONS Recent forest development in the Mission Creek watershed has not resulted in physical channel change. Mission Creek above Fish Hawk Creek and Belgo Creek are both stable sites and show no significant channel changes since The photo monitoring sites (Lees Creek and Un-named Creek) also remain stable. Fish Hawk Creek, Mission Creek above Pearson Creek and Pearson Creek are all dynamic channels with active bedload movement and localized minor bank erosion. All three of these sites continue to show signs of minor instability with the absence of significant peak flows, or significant watershed events/occurrences. Based on flow data from Mission Creek (WSC Station O8NM116) the annual peak flow return periods have been calculated as a 2 year event for 1999, a 3 year event for 2000, a 1 year event for 2001, and a 4 year event for Flows for these return periods alone are not expected to result in detectable channel changes, however, peak flow events with return periods 5 years may cause channel changes. The effects that peak flows have on channel conditions are better understood when overview field observations are made during the peak flow period. The occurrence of any other event that may affect channel stability (forest fires, mass wasting, significant forest development, etc.) may also cause channel changes. File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

10 Mission Creek/Channel Monitoring Program - Year 4 Page RECOMMENDATIONS It is not critical to continue with routine annual channel monitoring updates, however annual channel monitoring updates help link changes on the landscape and changes in annual stream flow conditions to channel conditions. Consideration should be given to continue routine annual monitoring for the Fish Hawk site, the Pearson site and the Mission above Pearson site, as they continue to show signs of instability, even in the absence of significant peak flow events. If peak flows (annual maximum daily discharges) increase significantly ( 5 year return periods) monitoring updates should be conducted during the year of occurrence. Dobson Engineering Ltd. will notify Riverside Forest Products Ltd. when peak flow return periods are 5 year events. This will help ensure a channel monitoring update is conducted within the year of occurrence. Monitoring updates should also be conducted if there are other events in the watershed that may affect channel stability (forest fires, mass wasting, significant forest development, etc). Overview field observations should be recorded during the peak flow period, however the physical measurement work should be conducted in late summer or early fall. In the absence of any peak flow or other watershed events that may affect channel stability, monitoring updates should be conducted every 5 years or in conjunction with future watershed assessment updates. This will help quantify any natural changes that may occur over time. Future channel monitoring update work could become part of Riverside Forest Products Ltd. Sustainable Forest Management Plan. Ensure future survey methods stay consistent with current survey methods. File: Project: Date: March 2003 DOBSON ENGINEERING LTD.

11 Mission Creek Monitoring Sites Site Locations and Access Site Name Co-ordinates Access Mission Creek above Fish Hawk N W Fish Hawk Creek Mission Creek above Pearson N W N W Pearson Creek N W Belgo Creek N W Lees Creek N W Un-named N Creek W The site is located approximately 215 m upstream of the Fish Hawk confluence. The survey reach proceeds 100 m upstream from the benchmark. The benchmark is located on the south bank at The site is located approximately 160 m upstream from the Mission Creek confluence. The survey reach proceeds 100 m upstream. The benchmark is located on the west bank at The site is located on the Mission Creek mainstem off Greystoke Forest Service Road at the recreation site. This is approximately 1.5 km past the Greystoke Road bridge crossing on Mission Creek. The survey reach proceeds 100 m upstream from the benchmark. The benchmark is located on the east bank. The site is located approximately 118 m upstream from the old weir near the mouth of Pearson Creek. The survey reach proceeds 100 m upstream from the benchmark. The benchmark is located on the south bank. The site is located on Belgo Creek approximately 10.5 km up Philpott Road. To reach the site, hike off the road at the 10.5 km mark heading SE for 200m. Then proceed 95 m upstream to the location. The survey reach proceeds 100 m upstream past the benchmark. The benchmark is located on a cedar (1 m diameter) near the northwest bank at This is a photo site only. The photo location is approximately 50 m upstream from the road crossing. This is a photo site only. The creek is located 600 m east of Lees Creek. The photo location is approximately 40 m upstream from the road crossing.

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17 Monitoring Site Data Summary (2002) Mission Creek above Fish Hawk Creek *Pebble Count Data Size Range (mm) Total % In Class Cumulative % Particle Description 0-2 Sand 2-4 Very Fine Gravel 4-8 Fine Gravel 8-16 Medium Gravel Coarse Gravel No Data Collected due to frozen stream bed Very Coarse Gravel Small Cobble Large Cobble Small Boulder Medium Boulder Large Boulder Very Large Boulder *A minimum of 100 particles was measured along the survey reach. Also see chart at end of this section. Particle Size Distribution d16 d50 d84 *Cross Section Data CS1 CS2 CS3 CS4 CS5 Average *Bankfull Area (m 2 ) *Bankfull Width (m) *Mean Bankfull Depth (m) Unable to survey cross-sections due to iced in channel *Width to Depth Ratio Gradient (%) % *Information Derived from Cross Section Data Sheet at the end of this section. Channel Characteristics Channel type and disturbance *Bed materials (visual estimate) *Bank materials (visual estimate) level CPc/b:S b/c b/c/g *R=bedrock, B=boulder, C=cobble, G=gravel, S=sand. For channel types, refer to the Channel Assessment Procedure Field Guide. *Riparian Vegetation - (Seral Stage Coniferous Old Growth Forest) Level of Functioning (Low/Moderate/High) Disturbance Indicators (Yes/No) LWD H Beaver Activity N Insects/Disease N Shade H Blowdown N Fire N Channel stability H Bank Failure N Landslide N Bank stability H Bridge/culvert N Road N

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22 Monitoring Site Data Summary (2001) Fish Hawk Creek *Pebble Count Data Size Range (mm) Total % In Class Cumulative % Particle Description 0-2 Sand 2-4 Very Fine Gravel 4-8 Fine Gravel 8-16 Medium Gravel Coarse Gravel No Data Collected due to frozen stream bed Very Coarse Gravel Small Cobble Large Cobble Small Boulder Medium Boulder Large Boulder Very Large Boulder *A minimum of 100 particles was measured along the survey reach. Also see chart at end of this section. Particle Size Distribution d16 27 mm d mm d mm *Cross Section Data CS1 CS2 CS3 CS4 CS5 Average *Bankfull Area (m 2 ) *Bankfull Width (m) *Mean Bankfull Depth (m) Unable to survey cross-sections due to iced in channel *Width to Depth Ratio Gradient (%) % *Information Derived from Cross Section Data Sheet at the end of this section. Channel Characteristics Channel type and disturbance *Bed materials (visual estimate) *Bank materials (visual estimate) level CPc/b:D3 c/b b/c/g *R=bedrock, B=boulder, C=cobble, G=gravel, S=sand. For channel types, refer to the Channel Assessment Procedure Field Guide. *Riparian Vegetation - (Seral Stage Coniferous Old Growth Forest) Level of Functioning (Low/Moderate/High) Disturbance Indicators (Yes/No) LWD L Beaver Activity N Insects/Disease N Shade L Blowdown Y Fire N Channel stability L Bank Failure Y Landslide Y Bank stability L Bridge/culvert N Road N

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29 Monitoring Site Data Summary (2002) Mission Creek above Pearson Creek *Pebble Count Data Size Range (mm) Total % In Class Cumulative % Particle Description 0-2 Sand 2-4 Very Fine Gravel 4-8 Fine Gravel 8-16 Medium Gravel Coarse Gravel No Data Collected due to frozen Very Coarse Gravel stream bed Small Cobble Large Cobble Small Boulder Medium Boulder Large Boulder Very Large Boulder *A minimum of 100 particles was measured along the survey reach. Also see chart at end of this section. Particle Size Distribution d16 d50 d84 *Cross Section Data CS1 CS2 CS3 CS4 CS5 Average *Bankfull Area (m 2 ) *Bankfull Width (m) *Mean Bankfull Depth (m) *Width to Depth Ratio Gradient (%) % *Information Derived from Cross Section Data Sheet at the end of this section. Channel Characteristics Channel type and disturbance *Bed materials (visual estimate) *Bank materials (visual estimate) level RPg/c-w:A2 G/c g/c/s *R=bedrock, B=boulder, C=cobble, G=gravel, S=sand. For channel types, refer to the Channel Assessment Procedure Field Guide. *Riparian Vegetation - (Seral Stage Coniferous Old Growth Forest) Level of Functioning (Low/Moderate/High) Disturbance Indicators (Yes/No) LWD M Beaver Activity N Insects/Disease N Shade M Blowdown N Fire N Channel stability M Bank Failure N Landslide N Bank stability M Bridge/culvert N Road N

30 Mission Creek above Pearson Creek - Cross Section 1 ( ) Right Pin ground Left Pin ground Elevation (m) BF 2001 Data BF 919 LEGEND Data Distance from right pin (m) 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

31 Mission Creek above Pearson Creek - Cross Section 2 ( ) Right Pin ground BF 2000 Data BF Left Pin ground Elevation (m) Data Distance from right pin (m) LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

32 Mission Creek above Pearson Creek - Cross Section 3 ( ) Right Pin ground Left Pin ground BF BF Elevation (m) Data 2001 Data Log jam Vegetated Island Distance from rightpin (m) Vegetated Island LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

33 Mission Creek above Pearson Creek - Cross Section 4 ( ) Right Pin ground o Logs gone in 2002 Left Pin ground 921 BF o o o BF Elevation (m) x 2000 Data Vegetated Island Vegetated Island 2001 Data 919 LEGEND Distance from right pin (m) 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

34 Mission Creek above Pearson Creek - Cross Section 5 ( ) Right Pin ground BF Left Pin ground BF Elevation (m) Data Distance from right pin (m) 2001 Data LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

35 Creek: Mission above Pearson Date: 29-Oct-02 CS1 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Thalweg Bottom of bank Bank full Top of bank Average depth Area Left pin, ground Left pin, top Width W/D Ratio 92

36 Creek: Mission above Pearson Date: 29-Oct-02 CS2 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Thalweg Bottom of bank Bank full Top of bank Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 77

37 Creek: Mission above Pearson Date: 29-Oct-02 CS3 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Thalweg Edge of jam Top of jam Top of jam Edge of jam Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Bottom of bank Bank full Top of bank Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio

38 Creek: Mision above Pearson Date: 29-Oct-02 CS4 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Thalweg Rock top Edge of veg. Island Edge of wood pile Top of wood pile Edge of wood pile Edge of wood pile Edge of wood pile Edge of wood pile Edge of wood pile Edge of wood pile Edge of wood pile Edge of veg. Island Edge of log Top of log Edge of log Edge of veg. Island Edge of veg. Island Edge of veg. Island Edge of veg. Island Bottom of bank Bank full Average depth Area Top of bank Width Left pin, ground Left pin, top W/D Ratio Turn point Turn point

39 Creek: Mission above Pearson Date: 29-Oct-02 CS5 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Thalweg Bottom of bank Bank full/top of bank Left pin, bottom Left pin, top Average depth Area Width W/D Ratio 42

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45 Monitoring Data Summary (2002) Pearson Creek *Pebble Count Data Size Range (mm) Total % In Class Cumulative % Particle Description 0-2 Sand 2-4 Very Fine Gravel 4-8 Fine Gravel 8-16 Medium Gravel No Data Collected due to frozen Coarse Gravel stream bed Very Coarse Gravel Small Cobble Large Cobble Small Boulder Medium Boulder Large Boulder Very Large Boulder *A minimum of 100 particles was measured along the survey reach. Also see Grain Size Distribution Chart in this section. Particle Size Distribution d16 d50 d84 Cross Section Data CS1 CS2 CS3 CS4 CS5 Average *Bankfull Area (m 2 ) *Bankfull Width (m) *Mean Bankfull Depth (m) *Width to Depth Ratio Gradient (%) % *Information Derived from Cross Section Data Sheet at the end of this section. Channel Characteristics Channel type and disturbance *Bed materials (visual estimate) *Bank materials (visual estimate) level CPc-:A2 C/b G/c *R=bedrock, B=boulder, C=cobble, G=gravel, S=sand. For channel types, refer to the Channel Assessment Procedure Field Guide. *Riparian Vegetation - (Seral Stage Mixed Pole Sapling Forest) Level of Functioning (Low/Moderate/High) Disturbance Indicators (Yes/No) LWD L Beaver Activity N Insects/Disease N Shade M Blowdown N Fire N Channel stability M Bank Failure Y Landslide N Bank stability M Bridge/culvert N Road N

46 Pearson Creek - Cross Section 1 ( ) Top of Levy 2000 Data Left Pin ground Elevation (m) Right Pin ground BF 2001 Data LEGEND Distance from right pin (m) 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

47 Pearson Creek - Cross Section 2 ( ) Right Pin ground BF o BF Left Pin ground Elevation (m) o o 2000 Data 2001 Data Distance from right pin (m) LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

48 Pearson Creek - Cross Section 3 ( ) Right Pin ground Elevation (m) BF Left Pin ground BF changed in 2002 Bank erosion Data 2001 Data LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration) Distance from right pin (m)

49 Pearson Creek - Cross Section 4 ( ) Left Pin ground new BF Elevation (m) Right Pin ground old BF BF LEGEND Data 2001 Data Distance from right pin (m) 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

50 Pearson Creek - Cross Section 5 ( ) Elevation (m) 942 BF Right Pin ground 2001 Data BF Left Pin ground Data Distance from right pin (m) LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

51 Creek: Pearson Date: 29-Oct-02 CS1 Assessor: Gary V. / Gaucher B. Station BS HI FS Elevation Comments (q) Right pin, top Average Depth Width at Depth W x D = A Top of levy (m) (m) (m2) Thalweg Bottom of bank Bank full Left pin bottom Left pin top Average depth Area Turn point Turn point Width W/D Ratio 34

52 Creek: Pearson Date: 29-Oct-02 CS2 Assessor: Gary V. / Gaucher B. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, bottom Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Edge of jam Top of jam Edge of jam Thalweg Bank full Top of bank Left pin, bottom Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 42

53 Creek: Pearson Date: 29-Oct-02 CS3 Assessor: Gary V. / Gaucher B. Station BS HI FS Elevation Comments (q) Right pin, top Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank New Bank full Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 20

54 Creek: Pearson Date: 29-Oct-02 CS4 Assessor: Gary V. / Gaucher B. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, bottom Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Thalweg Bottom of bank old Bank full New BF Top of bank Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 30

55 Creek: Pearson Date: 29-Oct-02 CS5 Assessor: Gary V. / Gaucher B. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, bottom Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank Thalweg Bottom of bank Bank full Top of bank Left pin, ground Average depth Area Left pin, top Width 9.70 W/D Ratio 26

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61 Monitoring Site Data Summary (2002) Belgo Creek *Pebble Count Data Size Range (mm) Total % In Class Cumulative % Particle Description 0-2 Sand 2-4 Very Fine Gravel 4-8 Fine Gravel 8-16 Medium Gravel Coarse Gravel No Data Collected due to frozen stream bed Very Coarse Gravel Small Cobble Large Cobble Small Boulder Medium Boulder Large Boulder Very Large Boulder *A minimum of 100 particles was measured along the survey reach. Also see chart at end of this section. Particle Size Distribution d16 d50 d84 *Cross Section Data CS1 CS2 CS3 CS4 CS5 Average *Bankfull Area (m 2 ) *Bankfull Width (m) *Mean Bankfull Depth (m) *Width to Depth Ratio Gradient (%) % *Information Derived from Cross Section Data Sheet at the end of this section. Channel Characteristics Channel type and disturbance *Bed materials (visual estimate) *Bank materials (visual estimate) level RPc-w:A1 g/c G/c *R=bedrock, B=boulder, C=cobble, G=gravel, S=sand. For channel types, refer to the Channel Assessment Procedure Field Guide. *Riparian Vegetation - (Seral Stage Coniferous Old Growth Forest) Level of Functioning (Low/Moderate/High) Disturbance Indicators (Yes/No) LWD H Beaver Activity N Insects/Disease N Shade H Blowdown Y Fire N Channel stability H Bank Failure Y Landslide N Bank stability H Bridge/culvert N Road N

62 Belgo Creek - Cross Section 1 ( ) New 2002 log jam LEGEND 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x Elevation (m) Right Pin 2001 Data (10:1 Vertical Scale Exageration) 2000 Data Bankfull Distance from right pin (m)

63 Belgo Creek - Cross Section 2 ( ) Elevation (m) old debris jam Right Pin ground BF o BF Left Pin ground LEGEND Data 2001 Data Log gone in Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration) Distance from right pin (m)

64 Belgo Creek - Cross Section 3 ( ) Right Pin ground Left Pin ground o Elevation (m) BF 2001 Data o o BF LEGEND Data debris jam shifted Log gone in Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration) Distance from right pin (m)

65 Belgo Creek - Cross Section 4 ( ) Left Pin ground Elevation (m) BF Right Pin ground 2001 Data BF Bank erosion noted in field LEGEND Data 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration) Distance from right pin (m)

66 Belgo Creek - Cross Section 5 ( ) Elevation (m) 952 Right Pin ground New BF o BF Left Pin ground LEGEND Data 2000 Data Log gone in Distance from right pin (m) 2000 Data 2001 Data 2002 Data Bankfull BF Log o Boulder x (10:1 Vertical Scale Exageration)

67 Creek: Belgo Date: 01-Nov-02 CS1 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, bottom Average Depth Width at Depth W x D = A (m) (m) (m2) New log jam start Ice End New Log Jam Bottom of bank Bank full Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 58

68 Creek: Belgo Date: 01-Nov-02 CS2 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bank full Top of bank Average depth Area Width W/D Ratio Left pin, ground Left pin, top Turn point Turn point

69 Creek: Belgo Date: 01-Nov-02 CS3 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Edge of log Top of log Edge of log Thalweg (?) Edge of log Top of log Edge of log Edge of debris (small jam) Top of jam Edge of jam Bottom of bank Bank full Top of bank Average depth Area Left pin, ground Left pin, top Width Turn point Turn point W/D Ratio 25

70 Creek: Belgo Date: 01-Nov-02 CS4 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Average Depth Width at Depth W x D = A Bank full (m) (m) (m2) Bottom of bank ice on stream Bottom of bank Bank full Top of bank Left pin, ground Average depth Area Left pin, top Turn point Width Turn point W/D Ratio 23

71 Creek: Belgo Date: 01-Nov-02 CS5 Assessor: Gary V. / Brian G. Station BS HI FS Elevation Comments (q) Right pin, top Right pin, ground Top of bank Average Depth Width at Depth W x D = A New Bankfull (m) (m) (m2) Bottom of bank log gone log gone Edge of tree Bank full Left pin, ground Left pin, top Average depth Area Width 8.2 W/D Ratio 18

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