Impact of Water Projects on River Flow Regimes and Water Quality: A Case Study in Huaihe River Basin of China
Research on the impact of water projects (dams or floodgates) on river hydrology and environment is an entirely new and important issue in river basin management in China as well as an international research. However, it is a difficult scientific research issue due to its complexity. Huaihe River basin is a unique area in China with highest density in both population and water projects, experiencing also the most serious pollution problem. This paper takes the middle and upper reaches of Huaihe River basin as example and develops a distributional SWAT model coupling with a water quality - quantity balance model. The impact of water projects on water quantity and quality is assessed against some key indices. Due to the lack of information before dam and floodgate construction, the research is a type of PUB issues (prediction for ungauged basins). Scenario analysis was then conducted in order to derive the water quality and quantity results in the case of non -dams. The results show that water project construction will tend to reduce runoff, decrease peak value and shift peaking time. The contribution of water projects to river water quality is only between 0 - 40％ while the exceeding pollutant discharge contribute 60％- 100％ of water pollution. Therefore, pollution control is the key to reduce water pollution in the basin.
water projects flow regimes water environment Huaihe River Basin
Xia Jun Zhang Yongyong
Key Laboratory of Water Cycle and Related land Surface Processes, Chinese Academy of Sciences State Key Laboratory of Water Cycle and Related land Surface Processes, Chinese Academy of Sciences State
国际会议
三峡
英文
157-169
2008-10-01（万方平台首次上网日期，不代表论文的发表时间）