The Feasibility Research Of Lake Water Environment Treatment And Ecological Engineering Intervene

Human beings reside chaseing water resources since ancient times,or build reservoir in order to live, It's patently obvious that human activities effect on these water. the influence existing in great quantity in region that people and environment interactive strong——lake,reservoir around city. The development had a reciprocal impact,hostage to water pollution and people's living environment. This article's study target Qinggeda Lake is a typically exurban lake, human activities vomits out amount of sewage into Qingeda Lake. Made Water quality deterioration, to be in a eutrophic condition, affects lake landscape,irrigate farmland and fishery breed.Conventional water environment treatment means: 1. pollution source treatment, non point pollution become more and more serious; 2.lake regulation, investment is high, Conventional Ecological Engineering is too slowly, and not suit for some region. this article adjust measures to local conditions, make the most use of crude self-purification resources, try to define a new ideal for lake water environment treatment.This research through field investigation,bedload adsorption sedimentation experiment in lab and technology design to discuss the Feasibility of cofferdam engineering of Qinggeda Lake. Try to adopt estuarine regulation mode:seting cofferdam engineering at the main pollutant source Shuimo River estuarine , make use of bedload adsorption ,take the pollution out of the lake, demarcation a part of treatment cell, Give for cantlet lake water to make the entirety lake water quality improvementThrough the bedload adsorption sedimentation experiment,the main results have been attained as follows:(1)the suspended sediment has obviously effect on concentration of COD in water,it shows adsorption that bedload adsorb COD is obvious,along with the sedimentation of suspended bedload,the concentration of COD is reduced.(2)adsorption that bedload adsorb total Cr is obvious , the average removing percentage of each bedload sample is 62.88%.(3)the suspended sediment can restrain the alga grow in water.(4)add bedload can increase the water turbidity transitorily,after sedimentation 24h,the concentration of suspended sediment has dropped to the concentration of suspended sediment did not add bedload in water,water turbidity debased,so we can know add bedload will not obviously affect water landscape.Meanwhile,this article also discussed the management measures with the sustainable of estuarine cofferdam engineering technology. Has important theoretical and realistic significance for water environment treatment,eco-environment construction and sustainable development.