粤港澳大湾区前山河排涝格局演变及治理方案研究

Study on drainage pattern evolution and treatment scheme of Qianshan intercity border River in Guangdong-Hong Kong-Macao Greater Bay Area

前山河为粤港澳大湾区典型跨市界河,其排涝能力直接关系珠海、中山两市的安全。依据历史资料分析了前山河流域跨界区域的排涝格局演变情况,并从水利工程、河床演变、下垫面变化等方面分析了现状排涝格局存在的问题。针对存在的问题,从“蓄、挡、滞、导、排”角度提出相应的排涝治理方案,并采用一维水动力数学模型,对方案的有效性进行计算分析,结果表明应用所提出的针对性治理措施后,前山河流域跨市界河内涝洪水位有较大下降,排涝不畅问题得到解决。

Qianshan River is a typical intercity border river in Guangdong-Hong Kong-Macao Greater Bay Area,and its drainage capacity directly inpacts the safety of Zhuhai and Zhongshan.Based on the historical data,the drainage pattern evolution in Qianshan River Basin is analyzed,and the existing problems of drainage pattern are analyzed from the aspects of water conservancy engineering,river bed evolution and underlying surface change.Aiming at the problems,from the"storage,block,hysteresis,guide,drainage"point,this paper puts forward the corresponding drainage treatment scheme,calculations and analyses the effectiveness of the scheme using one-dimensional hydrodynamic mathematical model.The results show that after the application of the proposed targeted treatment measures,the waterlogging and flood level of Qianshan intercity border River has decreased greatly,and the problem of poor drainage has been solved.