为了调整上荆江河势及预测三峡工程兴建后上荆江河势变化趋势，分阶段进行了上荆江实体模型河势调整试验和河床冲刷试验研究工作。试验结果表明：在上荆江河势调整试验中，通过系列工程布置，对改善沙市、郝穴河弯的河势，促使主泓南移起到较好效果；三峡工程运用初期30年内，上荆江陈家湾至新厂段河床冲刷自上而下沿程发展，整体河势基本保持不变，局部河势有所调整。

n order to adjust Upper Jingjiang stretch fluvial regime and predict its change tendency after completion of TGP,a hysical model study on Upper Jingjiang Stretch was carried out at various stages. The experimental results indicated that Shashi and Haoxue stretches fluvial regime would be ameliorated and their main stream line would be moved to south by means of serial regulating works laying out in Upper Jingjiang Stretch;that river bed from Chenjiawan to Xinchang would scour throughout whole distance from up-stream to downstrean, but the overall fluvial regime remain stable basically except local ones during 30 years after TGP being completed and operated initially