三峡水库蓄水前后洞庭湖区主要水文站泥沙变化趋势分析

摘要

洞庭湖是调节湘、资、沅、澧四水和分蓄长江洪水的重要天然湖泊，三峡水库蓄水后，对长江上游来水来沙进行了有效调节。通过分析洞庭湖区5个控制站在三峡水库蓄水前后的泥沙变化趋势，揭示了三峡水库蓄水对洞庭湖的影响情况。%Dongting Lake is the key of Yangtze River flood diversion and storage and effective ad-j ustment of River Xiang,Zi,Yuan and Li.After the Three Gorges reservoir filling,it has adj us-ted the upper reaches inflow and sediment effectively.Through analyzing five control stations sediment variation trend in Dongting Lake district,we can discover the influence to Dongting Lake caused by Three Gorges reservoir filling.