长江口岸带冲淤及后备土地资源的沉降效应——以上海崇明东滩为例

The Case of East Beach on Chongming Island in Shanghai:Evolution of Bank Erosion and Deposition at the Yangtze Estuarine and Subsidence Effects on Reserve Land Resources

长江口入海泥沙的淤积是上海后备土地资源的重要来源,分析岸带冲淤的演变,有助于对岸带经济圈特别是围垦促淤地区因经济工程活动引发的地面沉降问题的剖析。本文以上海崇明东滩为例,分析30年来的冲淤变化及未来趋势,并据此对新近沉积土的地面沉降效应作简要阐述。

Deposition at the Yangtze Estuarine supplies the very important substance for Shanghai＇ s reserve land resources. It is helpful to analyze the evolution of bank erosion and deposition for understanding the mechanics of land subsidence caused by human construction activities in and around the economic zone of the coast, especially in the polder areas. Taking East Beach on Chongming Island in Shanghai as a case, this paper studied the patterns of erosion and deposition in the last 30 years and made a prediction for its future tendency. Based on this, subsidence effects on the new deposits were explained in brief.