长江如皋沙群演变与整治

Rugao sediment shoals evolution of the Yangtze river and its regulation

长江澄通河段上自江苏省江阴市黄山下至南通市东方红农场 (对岸徐六泾 ) ,全长 80余千米。如皋沙群位于澄通河段中上部 ,处于河口潮汐与径流交汇区。该段长江江面宽阔 ,宽度达 1 0多千米 ,水流流路分歧多变 ,为典型的多汊型河段。其变化直接影响到下游河势的稳定 ,故称之为河段中下部的“龙头”。依据历史资料和近期情况 ,研究探讨其演变规律 ,总结整治经验及教训 ,提出了整治措施 ,以便控制河势向有利方向发展 。

The Chengtong reach of the Yangtze river, totally more than 80 km, stretches from Huangshan of Jiangyin city to Dongfanghong farm (to the opposite bank of Xuliujing) of Nantong city, Jiangsu province. Rugao sediment shoals are located at the middle-upper part of this reach, in the confluent area of estuary tidal current and river flow. The river of this section is wider than 10 thousand meters and is braided complicatedly and changeably, being a typical multi-branch river type. The variation of this reach gives a direct influence on the stability of down stream river regime, so it is called as control section of the lower river reach. According to the historical data and present state, the evolution law of the reach and harnessing experiences and lessons are summarized and some regulation measures are put forward to control the river regime evolution and create favorable condition for the golden waterway development of the Yangtze river.