长江口南汇东滩水域水流挟沙力计算公式比选

Selection and comparison of formulas for flow sediment-laden capacity in water zone of Nanhui East Shoal in Yangtze River Estuary

上海市南汇东滩水域位于长江口和杭州湾交汇处,受径流、潮流、波浪等综合因素的影响,该水域水流挟沙力计算比较复杂。为了确定适用于南汇东滩水域的水流挟沙力计算公式,比较分析了河口区域常用的挟沙力计算公式,选取统计拟合方法、张瑞瑾挟沙力公式以及邓家泉挟沙力公式,分不同潮期,采用实测资料进行分析拟合验证。结果表明,邓家泉挟沙力计算公式较适宜该水域水流挟沙力计算。

The water zone of Nanhui East Shoal in Shanghai City is sited at the intersection of Yangtze River Estuary and Hangzhou Bay. Influenced by comprehensive factors of runoff,tide flow and wave etc.,the calculation for flow sediment- laden capacity in the water zone is complicated. In order to determine the flow sediment- laden capacity formula suitable for the water zone,we analyze and compare the common- used flow sediment- laden capacity formulas for estuary area and select the statistical fitting method,Zhangruijin Formula and Dengjiaquan Formula for flow sediment- laden capacity to carry out analysis- fitting and verification of the suitability of the formulas in different tide periods by the measured data in the water zone. The analysis and verification result shows that Dengjiaquan Formula is more suitable for calculation of flow sediment- laden capacity in the water zone of Nanhui East Shoal.