The Huong River the nature, climate, hydro-meteorological issues and the AWCI demonstration project 7th GEOSS AP Symposium, the AWCI parallel session May 27, 214, Tokyo National Centre for Hydro-Meteorological Forecasting (NCHMF), NHMS of Vietnam Dr.Dang Ngoc Tinh
1. Briefing on the Huong river basin Total area of the Huong basin is 283km 2, representing 56% of the total area of the Thua Thien Hue province. The river forms a central part of the economic and social development of the province, with many people depending on it for their livelihood.. With the area 22, ha, the Tam Giang-Cau Hai Lagoon is recognized as a particularly valuable asset and an important part of the life of its many users. The main issues associated with the Huong River Basi are flooding in the rainy season and saline water intrusion in the dry season.
Hydro-Meteorological Observation system 1 rain gauge stations and 6 water level measurement stations, some of local stations. In flood season available 6-hourly rainfall and water level data from these stations, report 4 times/day. In flood situation: 1-hourly data from these stations.. There is no water quality observation at these stations. Hydro-Meteorological Network in Thua Thien Hue Province
Runoff in flood season from October to December consists of 7 75% total annual runoff, while dry season lasting 9 months, including the period of early small floods in May June, has only 25 3% total annual runoff 25 Observed monthly multi-years average discharge (m 3 /s) 2 TaTrach River at ThuongNhat (1981-27) HuuTrach River at BinhDien (1976-27) 15 Bo River at CoBi (1977-27) 1 5 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
In the dry season, there are 2 driest period: from March to April and from July to August. The lowest monthly flow is April. 18 Monthly multi-year average runoff distribution in dry season on main rivers of the Huong river basin 16 14 Ta Trach -Thuong Nhat Bo - Co Bi W (MCM) 12 1 Huu Trach - Binh Dien 8 6 4 2 Jan Feb Mar Apr May Jun Jul Aug Sep
At the present, to response to flooding and saline water intrusion, number of control structures has been constructed as reservoirs like Co Bi, Ta Luong, Truoi, Ta Trach, Huu Trach, A Luoi as well as barriers to prevent saline water intrusion, the most notable of which is the Thao Long Barrage. These structures strongly have change hydrological regime of the Huong river basin. A Luoi Reservoir
2. The AWCI demonstration project Spatial distribution of TRRM 3-35 mm/yr, Rainy season: Oct-Nov
Application of Satellite Data for the Vietnamese River Systems Calibration of the DHM with satellite rainfall data at Kim Long St. Huong River 16 12 Streamflow [m 3 /s] 8 4 1/1 1/7 1/13 1/19 1/25 1/31 11/6 24 Raingauge Observed TRMM HRM GPV
Application of Satellite Data for the Vietnamese River Systems 24-3 November Simulation Discharge [m 3 /s] 7 6 5 4 3 2 1 Difference due to overflow during Inundation 23 24 25 26 27 28 29 3 Nov, 24 Gauge Obs TRMM HRM-6hr GPV
Application of Satellite Data for the Vietnamese River Systems At Kim Long Station Huong River (Sour: University of Tokyo) 35 3 25 m 3 /s 2 15 1 5 9/26 9/28 9/3 1/2 1/4 1/6 1/8 1/1 1/12 26
Other activities of the Huong River Basin Demonstration Project + Joint Vietnam-Japan Workshops on Sustainable Water Management in Hue city, Vietnam, March 9-1, 29 and in Tokyo, 212 + Finished data uploading, verified for period from 24 to 21 + Simulated hydrograph for period Oct. 9 Nov.5, 28 and forecasted hydrograph for period Aug. 21 Sep.5, 29 using distributed model GBHM (Geomorphology-based Hydrological Model University of Tokyo) and High Resolution Model (HRM, Vietnam): - Made some modification of GBHM in sources code for running from month to month, read HRM forecasted rainfall input file in ASCII format. + Improvement of warning flood forecasting system for the Huong river using DHM with satellite data and numerical weather forecasts, including reservoir operations. Dr. Oliver Saavedra and his team (Tokyo Institute of Technology + Climate change impact assessment to the Huong river water resources
45 4 35 Observed and forecast hydrographs at Kim Long station (1/9/28-11/5/28) Observe Ob Rainfall Hrm Rainfall 3 25 2 15 1 5 1 24 47 7 93 116 139 162 185 28 231 254 277 3 323 346 369 392 415 438 461 484 57 53 553 576 599 622 645 668
Observed and forecast hydrographs at Kim Long station (8/21/29-9/5/29) 4 35 forecast Observed 3 25 2 15 1 5 1 7 13 19 25 31 37 43 49 55 61 67 73 79 85 91 97 13 19 115 121 127 133 139 145 151 157 163
Huong Preliminary Q Comparison 5 GCM Models from CMIP3 45 4 35 3 25 2 15 1 5 4 35 3 25 2 15 1 5 Highest 2 Rank of Daily Discharge 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Rank Qrank GFDL (1981-2) Qrank GFDL (246-265) 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Rank Qrank GISS (1981-2) Qrank GISS (246-265) 5 45 4 35 3 25 2 15 1 5 5 45 4 35 3 25 2 15 1 5 9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Rank Qrank MIROC_H (1981-2) 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Rank Qrank MIROC_M (1981-2) Qrank MIROC_M (246-265) 1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 Rank Qrank MIUB (1981-2) Qrank MIUB (246-265)
6 5 4 3 2 1 6 5 4 3 2 1 Average Daily Discharge for each month (Climatology) GFDL (1981-2) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC GISS (1981-2) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 6 5 4 3 2 1 6 5 4 3 2 1 6 5 4 3 2 1 MIROC_H (1981-2) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MIROC_M (1981-2) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC MIUB (1981-2) MIUB (246-265) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
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