Farmland Drainage Ditch-pond Wetland System's Construction and Its Operation Management of Ecological Irrigation Districts

The construction of ecological irrigation district is an important content of the modern irrigation district development.Based on the present situation that agricultural non-point source pollution is increasingly serious at traditional irrigation district,research progress in the removal of agricultural non-point source pollution by using farmland drainage ditch-pond system is summarized.The construction method of new farmland drainage ditch-pond wetland system based on pollution reduction is discussed,the essential characteristic includes water conservancy project attribute(the requirement for waterlogging drainage,the noneroding and non-silting velocity of ditch),building drainage sluice(low dams) at the tail end of ditch(pond),planting preponderant vegetation,constructing ecological revetment(bottom protection),designing the working conditions of pollution reduction of drainage sluice(escape sluice) and other hydraulic structure.The operation management of the new drainage ditch-pond wetland system is analyzed.