一前言平原湖区通常有两种排水方式。一种是将涝水直接提水外排的一级排水方式;另一种是在较低地区建小站(二级电排站)将涝水排入河网或湖泊,再由一级电排站提排出江的两级排水方式。一级排水方式适用于排水面积小,扬程不大的涝区;对排水面积大,地 A Preamble There are usually two types of drainage in the plain lake area. One is to raise waterlogging water directly to the external drainage of a drainage system; the other is to build small stations in the lower regions (secondary drainage station) to drain water into the river network or lake, Row of stations to discharge the river two drainage methods. A drainage method is suitable for small drainage area, head lift is not large area; on the drainage area, ground