2002年黄河调水调沙试验河口形态变化

近年来黄河河口水沙条件基本处于维持不断流状态，汛期非汛期界限已非常不明显，河口形态变化基本特征发生明显改变。调水调沙试验前河口径流作用微弱，河口沙嘴长时间主要受潮流侵蚀作用逐渐向临界平衡状态调整。但是2002年7月调水调沙试验河口有一个14天的0．664亿t泥沙人海口门快速堆积过程，河口形态又形成一个不稳定的快速堆积状态。本文通过2001年6月与2002年7月两次拦门沙测验地形与相关水文资料，计算输海泥沙的数量及其分布，分析了该次调水调沙试验后河口形态特征变化。

Regime variation of the Yellow River Estuary during 2002' water and sediment regulation test

In recent years, the main shape character of the Yellow River Estuary has been changed apparently due to the low incoming flow and sediment, as well as the obscure flood season and non-flood season. Before the regulation test of water and sediment, the action of flow from the Yellow River is very weak and the sand bar in the river mouth is eroded mainly by the tide for a long time and gradually turns to a new balance. However, the quick sedimentation of 66.4 million ton sediment in the river mouth during the 2002' water and sediment regulation test has completely changed the stable shape of the river mouth. Based on the two set of measured terrain of sand bar of June 2001 and July 2002 and related data, authors calculated the amount and distribution of sediment entering the sea and analyzed the variation of the Yellow River Estuary after the regulation test.