Preliminary Study on the New Way for Non-point Source Pollution Abatement in Rice-based Irrigation District

The excessive application of fertilizer and pesticide and its losses have exerted a great threat on the water environment.This paper introduces the Wetland-Reservoir-Subirrigation System(WRSIS),which is developed by Ohio State University and supplies a kind of water environment restoring technology,mainly based on hydraulic measures,for the control,reduction and solution of the problem of agricultural non-point source pollution.Considering the current status of irrigation and drainage systems in China,the WRSIS is re-designed and experimental studied in Guilin City of Guangxi Autonomous Region.The results show that the importation and re-design of WRSIS will be a practical and promising way to deal with the non-point source pollution in rice-based irrigation system.