Coastal erosion and its environmental effect in the Modern Yellow River Delta

The coast of Modern Yellow River Delta belongs to silt muddy coast,and it is impacted together by the volume of water and sand of Yellow River and marine coastal hydropower,its erosion is serious and the change has obvious temporal and spatial characteristic.In 1976,the Yellow River changed its flow along Qingshuigou,the coast of Diaokou outfall,which is the old course of Yellow River,began to erode.At the early years,the velocity of erosion is fast,recent ten years,the velocity is slower obviously.To the contrary,in the current outfall area occurs silting up.Since 1990s,especially recent years,the sediment discharge in the Yellow River was becoming less and less,so the area of siltation is limited around of current course,and the erosion occurs at large area in coast.As a typical coastal wetland of China,the environment of Modern Yellow River Delta is degraded because of the erosion.We should systematically and roundly research the complexity of coastal erosion in order to establish an integrated management system to mitigate it and improve the environment of coastal wetland.