The Huong River – the nature, climate, hydro-meteorological issues and the AWCI demonstration project 7th GEOSS AP Symposium, the AWCI parallel session May 27, 2014, Tokyo National Centre for Hydro-Meteorological Dr.Dang Ngoc Tinh Forecasting (NCHMF), NHMS of Vietnam
1. Briefing on the Huong river basin Total area of the Huong basin is 2830km 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 22,000 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 10 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 70 – 75% total annual runoff, while dry season lasting 9 months, including the period of early small floods in May – June, has only 25 – 30% total annual runoff 250 Observed monthly multi-years average discharge (m 3 /s) 200 TaTrach River at ThuongNhat (1981-2007) HuuTrach River at BinhDien (1976-2007) Bo River at CoBi (1977-2007) 150 100 50 0 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. 180 Monthly multi-year average runoff distribution in dry season on main rivers of the Huong river basin 160 Ta Trach -Thuong Nhat 140 Bo - Co Bi W (MCM) Huu Trach - Binh Dien 120 100 80 60 40 20 0 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 3000-3500 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 1600 1200 3 /s] Streamflow [m 800 400 0 10/1 10/7 10/13 10/19 10/25 10/31 11/6 2004 Raingauge Observed TRMM HRM GPV
Application of Satellite Data for the Vietnamese River Systems 24-30 November Simulation 7000 6000 3 /s] Difference due to 5000 overflow during Discharge [m Inundation 4000 3000 2000 1000 0 23 24 25 26 27 28 29 30 Nov, 2004 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) 3500 3000 2500 2000 m 3 /s 1500 1000 500 0 9/26 9/28 9/30 10/2 10/4 10/6 10/8 10/10 10/12 2006
Other activities of the Huong River Basin Demonstration Project + Joint Vietnam-Japan Workshops on Sustainable Water Management in Hue city, Vietnam, March 9-10, 2009 and in Tokyo, 2012 + Finished data uploading, verified for period from 2004 to 2010 + Simulated hydrograph for period Oct. 9 – Nov.5, 2008 and forecasted hydrograph for period Aug. 21 – Sep.5, 2009 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
Observed and forecast hydrographs at Kim Long station (10/9/2008 - 11/05/2008) 4500 Observe 4000 Ob Rainfall Hrm Rainfall 3500 3000 2500 2000 1500 1000 500 0 1 24 47 70 93 116 139 162 185 208 231 254 277 300 323 346 369 392 415 438 461 484 507 530 553 576 599 622 645 668
Observed and forecast hydrographs at Kim Long station (08/21/2009 - 09/05/2009) 4000 forecast Observed 3500 3000 2500 2000 1500 1000 500 0 1 7 13 19 25 31 37 43 49 55 61 67 73 79 85 91 97 103 109 115 121 127 133 139 145 151 157 163
5000 Huong Preliminary Q Comparison Qrank MIROC_H (1981- 4500 Daily Discharge, m 3 /s 2000) 4000 5 GCM Models from CMIP3 3500 3000 2500 2000 Highest 20 Rank of Daily Discharge 1500 1000 4500 500 Qrank GFDL (1981-2000) 4000 Daily Discharge, m 3 /s 0 Qrank GFDL (2046-2065) 3500 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 3000 Rank 2500 5000 Qrank MIROC_M (1981-2000) 2000 4500 Daily Discharge, m 3 /s Qrank MIROC_M (2046-2065) 4000 1500 3500 1000 3000 500 2500 0 2000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1500 Rank 1000 500 4000 0 Qrank GISS (1981-2000) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Daily Discharge, m 3 /s 3500 Qrank GISS (2046-2065) Rank 3000 2500 9000 Qrank MIUB (1981-2000) 2000 8000 Daily Discharge, m 3 /s Qrank MIUB (2046-2065) 1500 7000 6000 1000 5000 500 4000 0 3000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 2000 Rank 1000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Rank
600 MIROC_H (1981- Average Daily 2000) Daily Discharge, m 3 /s 500 400 Discharge for each 300 month (Climatology) 200 100 600 GFDL (1981- 2000) Daily Discharge, m 3 /s 0 500 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 400 300 600 MIROC_M (1981- 200 2000) Daily Discharge, m 3 /s 500 100 400 0 300 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 200 100 600 GISS (1981- 0 2000) Daily Discharge, m 3 /s 500 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 600 MIUB (1981-2000) 400 MIUB (2046-2065) Daily Discharge, m 3 /s 500 300 400 200 300 100 200 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 100 0 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Thank you for or you our kin r kind d atte attenti ntion !
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