珠海市前山河流域水闸调度试验分析

Experimental Analysis of Sluice Operation in Qianshan River Basin in Zhuhai City

闸坝是重要的水利工程,通过闸坝控制蓄泄水量可以实现水质水量联合调度,改善流域生态与环境。广昌水闸、洪湾水闸和石角咀水闸是控制前山河(珠海段)排入磨刀口的水闸,常规用于挡水和排水。现对前山河进行水闸调度试验,由广昌水闸控制引水,洪湾、石角咀水闸控制排水,根据外江径流条件和潮汐活动情况,掌握控制水闸启闭最佳时机,在保障区域防洪排涝安全的基础上,让外江水量最大限度由广昌水闸通过广昌涌,经沙心涌进入前山河,改善前山河水系水质后排入磨刀口。该试验结果表明,通过调度前山河流域的广昌涌水质有一定的改善,但由于水动力不足,沙心涌和前山河水质改善效果不明显。

As important water conservancy facility, sluices can realize water joint scheduling and improve the watershed ecology and environment. Guangchang sluice, Hongwan sluice and Shijiaoju sluice are to control Qianshan River( zhuhai) into Modaokou, routinely used in blocking water and drainage. Qianshan river sluice scheduling test was carried out. In the changed programof Guangchang sluices routine operation, Guangchang sluice controls diversion and Hongwan sluice and Shijiaoju sluice controls drainage. According to the conditions of the river runoff and tidal activity, the timing to control gate opening and closing is arranged. On the basis of the regional flood control and drainage security, the river water is diverted to the greatest extent by Guangchang sluices through Guangchang channel, to improve the water quality of the river water environment in Qianshanhe River. The experimental study on dynamic scheduling was proved to improve the drainage water quality in Qianshanhe River, but the effect is not obvious on Shaxin Waterway and QianshanheRiver because the water is underpowered.