监利河段是下荆江变化最剧烈的河段之一，三峡工程运用后，下泄含沙量减小，该河段冲淤调整将更为明显。采用河道平面二维水沙数学模型，对监利河段在三峡工程蓄水运用初期可能产生的河床冲淤及河势变化进行了计算分析研究。结果表明：监利河段总体河势变化不大，但河床冲淤较为剧烈，断面冲深扩大，局部岸段和乌龟洲右缘部位崩退，乌龟洲左汊萎缩右汊扩大，新沙洲边滩有切滩的趋势。

 As one of the regimes subject to dramatic changes in lower Jingjiang reach, Jianli reach is to see a more obvious erosion and deposition adjustment due to reduced release of sediment after the operation of the Three Gorges Project(TGP). In this paper, the possible erosion and deposition of riverbed and regime change in Jianli reach during the initial operation stage of TGP were computed and studied using a 2-dimensional mathematic model of flow and sediment. The study showed that the overall regime changed slightly, while there were drastic erosion and deposition of riverbed as well as deepened scour depth of the crosssection. In addition, parts of the bank section and the right edge of Wugui sandbar declined and collapsed, and the left branch of Wugui sandbar shrinked while the right branch expanded，and the point bar of new sandbar was showing a tendency of being cut-off.