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.