基于水交换改善的大铲湾海闸调度优化设计

Optimal design of Dachanwan harbour sluice gate dispatching based on water exchange improvement

以深圳市大铲湾为研究对象,针对其潮流特征提出将原设计方案“一渠双闸”优化为“一渠一闸”,并基于MIKE21二维数学模型对海闸调度优化后大铲湾的水交换情况进行了数值模拟。结果表明:受西乡河影响的湾尖区域水质,无降雨情况下在第9 h恢复到初始值;初小雨情况下在第106 h(降雨结束后第3.4 d)恢复到初始值。即海澜路闸保持原运行方式,取消湾顶闸对湾尖区域水交换改善几乎无影响。该优化方案节约了工程投资,也为类似海湾水交换改善的海闸调度方案设计提供了参考。

Dachanwan Harbour in Shenzhen was taken as the research object,according to the characteristics of tidal current,the original design scheme“one canal and two gates”is optimized to“one canal and one gate”,based on the MIKE21 two-dimensional mathematical model,the water exchange in Dachanwan Harbour was simulated.Results show that the water quality in the area affected by Xixiang River returned to its initial value at 9 h without rainfall.In the case of light rain,the initial value was restored at 106 h(3.4 days after the end of rainfall).Hailan Road gate to maintain the original mode of operation,the removal of the headgate has little effect on the improvement of water exchange in the harbour tip area.The optimization scheme can save the project investment and also provide a reference for the design of the regulation scheme of gate similar to the harbour water exchange improvement.