江湖关系演变对洞庭湖区水资源影响机制研究
Research on the Impact Mechanism of Changes in River-Lake Relations on Water Resources in Dongting Lake Area

洞庭湖不仅是长江洪水的天然调蓄场所、全球重要的湿地，还是长江经济带、洞庭湖生态经济区等国家战略的重要依托。以洞庭湖区为研究对象，以三峡水库运用为时间节点，分为运行前(1960~2002年)和运行后(2003~2019年)2个阶段，根据洞庭湖湖区水位站、出湖水文站的实测资料，对比分析三峡水库建库前后湖区入湖水量、湖区水位、出湖水量的变化特征及趋势。结果表明，洞庭湖枯水期水位呈总体下降趋势，水位降低是水库调度、河道冲刷及前期江湖槽蓄量减小等因素共同作用结果。
Dongting Lake is not only a natural flood regulation lake for Yangtze River and global important wetland, but also an important support for major national strategies such as the Yangtze River Economic Belt and Dongting Lake Ecological Economic Zone. Taking the Dongting Lake area as the research object, this study is divided into two stages: before (1960~2002) and after (2003~2019) the operation of the Three Gorges Reservoir. Based on the measured data from the hydrological stations in the Dongting Lake area, the study analyzes the characteristics and tendency of changes in the inflow, water level, and outflow of the Dongting Lake area before and after the operation of the Three Gorges Reservoir. The results indicate that the water level of Dongting Lake shows an overall downward trend during the dry season, which is the result of the combined effects of reservoir operation, river channel erosion, and the reduction of water storage capacity in the river and lake.