Appraisal of Beijing Wetlands Water Purification Value

Wetland is a kind of land resources and also a kind of ecological environment, it play more important role in people daily lives. Wetland has the vital role in the ecosystem such as storage of water, transformation of nutrients, especially its water purification function, which has important economy and ecological value. The wetlands water purifies mainly aims at nitrogen and phosphorus which causes water body eutrophication pollutant, the wetlands together with the soil, the microorganism and vegetation removes the pollutant. This research mainly aims at the economic value of Beijing wetlands water quality to carry on the appraisal, according to Beijing wetland division standard, through to the different types of wetlands field survey, finally identifying the type of water purification is: The rivers wetlands, the water reserve wetlands, the marsh wetlands, and select 5 typical wetlands areas to take the water quality sampling area, finally applies the type the value of water purification unit area applied to the corresponding types of wetlands, thus obtains Beijing wetlands water purification value.