利用潮汐动力减轻深圳河污染的水力条件计算分析

建立了深圳河非恒定流数学模型，模型中考虑了过闸水头突变的计算方法，采用拉格朗日法研究深圳河上游的罗芳污水处理厂和滨河污水处理厂所排出污水沿深圳河的运动过程，计算分析了利用潮汐动力减轻深圳河污染的水力条件。结果表明，深圳河口建闸3种不同调控方案下污水运移至深圳河口的总时间有所增加，这对于减轻深圳河的污染情况不利；从大鹏湾抽调清水以增加上游来水量则会大大缩短污水运移至深圳河口的时间，从而减轻深圳河的污染状况。

Numerical Study on Engineering Measures to Mitigate Pollution in Shenzhen River by Use of Tidal Flow

A one-dimensional numerical model of non-steady tidal flow motion in the Shenzhen River was established, in which the change of water head through the waterlocks was taken into account to study the effects of two engineering measures to mitigate pollutions in the Shenzhen River. The first engineering measure was to construct the waterlocks nearby the Shenzhen River mouth, and the other one was to transfer the water from the Dapeng Bay to the upstream of the Shenzhen River. The Lagranrine tracing method was used to study the moving path of the sewage water particle from the Luofang sewage treating plant and the Binhe sewage treating plant, and to analyze the hydraulic conditions to mitigate the pollution in the Shenzhen River. It was found that the time of the sewage water particle moving to the Shenzhen River mouth would increase for the first engineering measure, indicating that it was useless to mitigate pollution; contrarily, the moving time of the sewage water particle would decrease remarkably for the second engineering measure, indicating that it was useful to mitigate pollution.