Ecological Restoration Plan Of WaWuZui River,MaoLi Lake In Jinshi City

Along with our country social economy rapid development,the environmental pollution problem increasingly prominent,especially in rural areas,as a result of the production activities of agricultural non-point source pollution,aquaculture and random of rural domestic sewage discharge of pollutants,has seriously deteriorated ecological environment of the countryside.This article take this opportunity to combine relevant theory foundation and ecological restoration measures,for WaWuZui creek watershed ecological restoration planning,mainly including the management of all kinds of pollution source in the basin,river restoration and basin in the form of natural vegetation restoration and protection.First through preliminary analysis,based on the analysis of the status quo and pollution load estimation,it is concluded that the following data:WaWuZui creek valley area of 29.34 km2,total population of about 3720 people,predicts that by 2037 the total population will reach 4450 people;The main sources of pollution in the river basin are living source pollution,agricultural source pollution and endogenous pollution,and the flow loss is approximately COD168.79t/a,tn8.14t/a,TP0.72t/a,nh3-n34.94 t/a.To effectively control of various pollution sources in the basin,restore original streams rivers natural form,the original forest vegetation,river flood control and disaster reduction ability,thus improving mauri as planning the overall goal of lake water environment,in the surface water environment quality standard"COD 15mg/L ? class of water quality standards,BOD3mg/L,NH3-N0.5 mg/L,TN0.5 mg/L,TP0.1 mg/L water quality target,after dealing with the artificial wetland drainage to reach this standard.Then according to the actuality of.WaWuZui creek watershed characteristic and pollution source distribution,determine the "four zones" a creek two laps,planning structure of the basin is divided into the river ecological restoration area,Liu Wenqiao ecological restoration area,taiping village ecological restoration area and estuary tidal flats wet areas.The following is the special planning content:the ecological restoration plan of the river mainly involves the widening of the channel,the setting of the mudflat wetland,the restoration of the upstream small gully and the river dredging works.The vegetation buffer zone is mainly distributed on both sides of the river,and the main channel is 10m,and the upstream side is 5m.The artificial wetland of domestic sewage is planned and utilized to treat domestic sewage with vertical submerged flow artificial wetland.There are 24 processing units,and the average sewage treatment scale is 100m3/d.The wetland type selected by the agricultural face source pollution artificial wetland is the horizontal submerged artificial wetland with a total area of 221448m2;The watershed is divided into four regions in the vegetation ecological restoration plan,including 1.274km2 of water conservation forest,4.245km2 ecological transformation forest and 8.025km2 of the original vegetation reserve.To establish the wetland protection ring and water source protection circle,the area of the water source protection zone is 300m around the reservoir.The main conclusions of this paper are as follows:(1)It is better to use multi-level artificial wetland to control agricultural surface pollution.WaWuZui creek watershed in farmland area is large,wide distribution,pollution control is the difficulty of pollutant dispersion,difficult to focus on,and the concentration of the pollutants vary with the size of the precipitation change,so in control of agricultural non-point source pollution in the process of using artificial wetland multistage treatment can obtain good governance effect.(2)It is difficult to collect sewage in rural areas,and it is suitable for sewage treatment.According to current WaWuZui creek watershed conditions,all the sewage processing in the basin is divided into 24 processing units,each processing unit is equipped with corresponding to the artificial wetland and sewage recycling.(3)Source control should be taken seriously.On the control of endogenous pollution source control should be paid great attention to,such as banning fat farmed fish farms,will WaWu mouth creek watershed large-scale aquaculture breeding all demolition and enclosures,and dredging the precipitation of a large number of pollutants river dredging,will deposit in the bottom of the river silt pollutants removal.(4)Restoring the natural form of river channel is an important way of ecological restoration of small watershed.The hydrological analysis and river water capacity calculation method,all streams within WaWu mouth creek watershed of river ecological restoration,such as restoring the upstream small gulley,increasing the estuary channel width,etc.,improve the storage capacity of the channel,and improve the ability of river flood control and mitigation,but also to accelerate small watershed ecological environment recovery.(5)Restoration and protection of plant community is the basis of ecological restoration ins small watershed.All bare hills and wasteland in the basin is planned for water source conservation forests,will present situation there is sparse,types of plant communities lack of trees and plants,single of regional planning for ecological reconstruction,Lin repair their ecological problems step by step;At the same time,the forest vegetation is protected by the use of the forest and the prohibition of all exploitation and utilization.It is hoped that this paper can provide useful experience for the application of ecological restoration and artificial wetland sewage treatment technology in the future.