摘要
沙湾河截排工程是深圳水库饮用水源保护区优化调整的要求,工程建设后可能增加深圳河流域的防洪排涝压力,因此有必要进行工程建设前后对流域防洪排涝的影响研究。利用城市洪涝数值模拟技术,选取不同的沙湾河截排方案,研究其对深圳水库和沙湾河防洪排涝的影响。结果表明:(1)源头调蓄和复合型雨洪调蓄湖相结合的截排方案相较于流域内分洪和地下调蓄湖相结合方案对沙湾河流域洪涝排除优化效果较明显;(2)在源头调蓄和复合型雨洪调蓄湖相结合的截排方案下,沙湾河遭遇100年一遇洪水时,沙湾水闸泄洪的洪水总量、洪峰流量随着深圳水库起调水位的降低呈现增加趋势且深圳水库调洪压力得到一定程度缓解。结果揭示了河流截排工程对流域防洪排涝的优化作用,对截排工程规模和工程方案决策有一定指导性作用。
The Shawan River Interception and Drainage Project is the requirement of the drinking water source protection zone in the Shenzhen Reservoir for its optimization and adjustment.The construction of the project may increase the flood control and drainage pressure of the Shenzhen River Basin.Thus,it is necessary to study the influence of the project on the flood control and drainage of the basin.Using the numerical simulation technology of urban flood,this paper investigates the influence of different Shawan River interception schemes on the flood control and drainage of Shenzhen Reservoir and Shawan River,with the following results obtained.(1)Compared with the combination of flood diversion in the basin and an underground reservoir lake,the combination of source regulation and a composite rainwater-flood reservoir lake has an obvious optimization effect on the flood control and drainage in the Shawan River Basin.(2)Under the interception and drainage scheme of combining the source regulation and a composite rainwater-flood reservoir lake,when the Shawan River encounters a once-in-a-century flood,the flood volume and peak discharge during flood discharge by the Shawan sluice will be enhanced with the lowering of the initial dispatch stage of the Shenzhen Reservoir,and the flood control pressure on the Shenzhen Reservoir will be alleviated.The results indicate the optimization effect of the river interception and drainage project on flood control and drainage of the basin,being of guiding significance for the decision-making regarding the scale and scheme of the interception and drainage project.
作者
陈丽贵
李天晓
CHEN Ligui;LI Tianxiao(Shenzhen Guanghuiyuan Environment&Water Co.,Ltd.,Shenzhen 518000,China;School of Hydraulic Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《人民珠江》
2022年第6期78-85,共8页
Pearl River
基金
深圳市水务发展专项资金(深水计[2020]5号)。
关键词
防洪排涝
截排工程
城市洪涝数值模拟
沙湾河流域
深圳水库
flood control and drainage
interception and drainage project
numerical simulation of urban flood
Shawan River Basin
Shenzhen Reservoir
