基于分流比法对河网水系排涝泵站规模的拟定分析——以广州市增城区十字海、百花涌、龙湖西涌泵站工程为例

Analysis on the Scale of Drainage Pumping Station in River Network Based on Diversion Ratio Method-Taking the pumping station projects of Shizihai,Baihuachong and Longhuxichong in Zengcheng District,Guangzhou City as an example

为保障增城区东江北干流沿线围内洪涝水安全,应对近年极端天气增多、外江洪潮水位抬升、城市化程度加大等不利情况,同时避免排涝分区不协调、泵站规模不匹配等问题,统筹协调合理确定内河涌河网水系各排涝出口泵站规模至关重要。通过实地踏勘、资料分析等方式,合理概化河网水系并划分排涝片区,确定分流口分流比,并基于分流比最终确定排涝入流量,采用“平湖法”确定各泵站规模,可为类似工程提供借鉴。

In order to ensure the safety of flood water along the north main stream of the Dongjiang River in Zengcheng District,it is essential to cope with the increasing extreme weather,the rising flood tide level of the outer river,the increasing urbanization and other adverse conditions in recent years,while avoiding the problems of uncoordinated drainage zones,mismatched pump station scale and so on.It is important to ensure the scale of each drainage outlet pump station in the inland river network through overall coordination and reasonable determination.By means of field survey and data analysis,the river network system is reasonably generalized and the drainage area is divided,the diversion ratio of the diversion port is determined,and the drainage inflow is finally determined based on the diversion ratio.After that,the scale of each pumping station is determined by the“Pinhu Method”.The analytical method and idea of scale determination can provide reference for the planning and design of drainage pump stations in river network with few data.