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潮汐作用下的往复式弯道环流与径流式弯道环流的结构特征应有区别。该文建立三维水动力数学模型模拟黄浦江吴淞口弯道环流,提出涡度作为环流强度指标,对吴淞口弯道环流时间和空间分布进行统计分析。结果显示,吴淞口弯道环流强度分布呈现弯道中段小、进出口两端大;在一个潮周期中涨潮期间环流强度大于落潮;涨潮时环流强度变化大,变化快,落潮时环流强度较稳定,变化小。
The tidal effect of reciprocating curve circulation and radial flow curve of the structural characteristics of the circulation should be different. In this paper, a three-dimensional hydrodynamic model is established to simulate the circulation of the Wusongkou bend in the Huangpu River. The eddy is proposed as the index of the circulation intensity to make a statistical analysis of the time and space circulation of the circulation in the Wusongkou bend. The results show that the circulation distribution in the bend of Wusongkou is small in the middle part of the curve and large in both ends of the inlet and outlet. The circulation intensity is greater than that in ebb tide in one tidal cycle, while the circulation intensity changes rapidly at high tide, and the circulation intensity is relatively stable at low tide Change is small.