The Change and Effect Factors of Water Level in Jingjiang River

Abstract

Based on the measured data from 1957 to 2007 in Jingjiang river, this paper analyzed the water level change in Jingjiang river in low water and bank-full discharge, and then established the relationship between the value of water level change and river sediment scour-silt amount with the measured topographic data after the cut-off. The results show that the relations are well at Shashi and Xinchang stations while the correlation is not obvious at Jianli station. Finally, the paper analyzed the influencing factors of water level change in Jingjiang river in view of the water and sediment changes before and after the impoundment of Three Gorges reservoir and found that the recent water level change in Jingjiang river is mainly caused by the incoming sediment concentration change in the main stream of Changjiang river.