黄河口垦东12区块海域泥沙输运的数值模拟

NUMERICAL SIMULATION OF SEDIMENT TRANSPORT IN KENDONG 12 AREA OFF THE YELLOW RIVER MOUTH

采用三维数值模型对垦东12区块海域流场变化、悬浮泥沙浓度分布进行了潮流周期内的数值模拟分析。研究结果表明,进海路修建后截断了现行清8汊河河口南侧的沿岸流通道,阻隔了入海径流和泥沙由现行河口的向南传输,导致河口入海泥沙在现行河口南侧沙嘴与进海路之间的区域快速淤积;同时,废弃的清水沟河口由于缺乏泥沙供应,海岸侵蚀加剧。数值模拟的结果与卫星遥感解译的岸线变化基本一致。

A three dimensional numerical model was established to assess the impacts of a cross-shore groin on the suspended matter dispersal off the Yellow River Mouth. The numerical results indicate that the groin cuts off the pathway of long shore sediment transport off the present Yellow River Mouth, prevent the river sediment dispersing southward and result in rapid sediment accumulation in the south of the river mouth. Meanwhile, the abandoned Qingshuigou River Mouth was subjected to serious erosion due the cutting off of the sediment supply from the present river mouth. The numeri cal results fit the changes of shoreline from 2000 to 2013 as acquired from the LANDSAT imageries.