(1) The Huaihe River Commission of the Ministry of Water Resources, China
The Hongru River was originated from the Funiu Mountains, located in northwest of the Huaihe River Basin (HRB), flows to the Huaihe River main channel at the boundary between Henan and Anhui Provinces. It is one of the largest branches of the Huaihe River Basin, with a drainage area of 12,380km^2, a length of 325km. The water yielded in the Hongru River Basin played a very important role in water resources development of HRB. The paper focused on the water budget components in accordance with the principle of water balance. The total inflow of the sub-basin was precipitation, whereas the outflow included a lot of components, such as discharge at the outlet, agricultural, industrial and domestic water supplies, evapotranspiration, and the water diverted to neighbor basins.
In this research, total 25 rain-gauges daily rainfall series and 8 stations daily discharge series were applied, and all the data series were from 1956 to 2000. The investigated monthly data series of agricultural, industrial and domestic water supplies, collected by the Hydrological Bureau of Henan Province, were also used to the water budget analysis. A conceptual basin hydrological model was built to analyze the precipitation distribution among the runoff, evapotranspiration, basin storage change and water supplies. The time series of the water budget components were analyzed also. Some parameters of the hydrological model, such as the maximum soil moisture (SM), field moisture capacity (Fc), and so on, were estimated by the method of trial and error. The efficiency coefficient of simulated runoff series to natural runoff series, which was the sum of the measured discharge, water supplies, the diverted water to outside of the sub-basin, and etc., was selected as the objective function of the modeling.
According to the analyzed result, the long-term average annual precipitation of Hongru River Basin was 915mm (or 11.3 x 10^9 m^3) and the runoff 244 mm (or 3.02 x 10^9 m^3). Corresponding to the year with an exceedance probability of 90% (P), annual precipitation of Hongru River Basin was 89.1mm (or 1.10 x 10^9 m^3), the runoff 47.5mm (or 0.59 x 10^9 m^3). The preliminary analysis shows that there is a tendency of decrease about precipitation and runoff during 1956-2000. The long-term annual precipitation and runoff over 21 years (1980-2000) was smaller than that of over 24 years (1956-1979). In the sub-basin, the temporal and spatial distributions of precipitation and runoff in one year were uneven, and more than 50% precipitation and runoff concentrated in summer from June to August.
The long-term average agricultural, industrial and domestic water supplies were 116 x 10^6 m^3, 3 x 10^6m^3, and 2 x 10^6 m^3 respectively. The agricultural water supplies accounted for 85% of total water supplies roughly. The trend of water supplies was increase, especially after 1980 due to the quickly local economics development and increase of population. Therefore, the conflict between water demand and water supply was gradually serious.
Finally, a general water resources development strategy for the sub-basin was presented based on the water balance analysis. The objective of development strategy was to ensure the water environment sustainability.
Submittal Information
Name :
Date :
Mr. Chen Hongyu
30-Jul-04-20:40:21
Organization :
Theme :
The Hydrological Bureau of the Huaihe River Commission, MWR, P.R.China
Theme 5
Address :
Presentation :
No 41 West Fengyang road, Bengbu, 233001, Anhui Province, P.R.China