三角洲型感潮河口泥沙输移规律研究

A Study of Sediment Transport in Delta Tidal Estuary

采用了数值模拟的方法对三角洲型河口在不同来流流量、不同来沙中值粒径的条件下泥沙输移规律进行了研究。结论表明:三角洲型感潮河口在丰水期、中水期和枯水期的变化规律基本相似,中值粒径对水位影响较小,潮水位影响较大,起主导作用。在丰水期,三角洲两侧为冲刷区,三角洲洲头、洲尾部形成淤积区;在中水期,三角洲两侧和三角洲尾部正中形成冲刷区,在洲头和尾部两端形成淤积区;在枯水期,进水口至洲头区域形成冲刷区域,出口两端是淤积区。

In this paper, a numerical simulation method is used to study the sediment transport law of delta type estuary under the conditions of different incoming flow rates and median diameters of incoming sediments. The conclusion shows that the variation pattern of delta type tidal estuary is similar to that in wet seasons, middle water periods and dry seasons, and the median particle size has less influence on the water level, and the tidal position is more important and plays a leading role. In the wet season, the delta erosion area on both sides of the head, tail, Delta Chau Chau formation sedimentation area. In water phase, delta is formed in the center of the tail on both sides of the scour area, sedimentation area is formed in delta front and rear ends. In the dry season, the water inlet to the delta head region of scour area, sedimentation area is exit end.