Impact of Recent Rapid Decrease of Fluvial Discharge from Large Rivers on Sedimentary Environment in the Western Yellow Sea-from Numerical Perspective

东海陆架的特点是大量河流排出的沉积物；尽管陆架海面积仅占总海域的0.35%，但黄河和长江两条中国河流提供的悬浮沉积物却高达世界河流提供的悬浮沉积物的12%。因此，了解这些沉积物的命运对了解陆架海的生态系统和形态至关重要。目前的研究主要集中在陆架沉积物再悬浮的发生上，这在空间尺度和时间尺度上都没有研究过。对近十年来由潮流、风浪和潮下流引起的海底应力的估计表明，不仅冬季风暴，而且夏季台风的通过似乎对再悬浮过程有很大的影响。

The East China Sea Shelf is characterized by an enormous amount of sediments discharged from rivers; suspended sediments supplied from two Chinese Rivers, the Huanghe and the Chang jiang were as large as 12 percent of those supplied from world rivers, even though the area of the shelf sea occupies only 0.35 percent of total sea area. It is therefore essential to understand the fate of such sediments to understand the ecosystem and morphology of the shelf sea. The current study focused on the occurrence of sediment resuspension on the shelf which had not been investigated in the shelf scale in space and in year-round scale in time. Estimates on the bottom stress induced by tidal currents, wind waves, and subtidal currents for the last ten years have shown that not only winter storms but also passage of typhoons in summer seems to have a large impact on the resuspension process.