%0 Journal Article
%T Ecological Engineering of Drawdown Wetlands Based on Water-level Fluctuation-Baijia Stream in the Three Gorges Reservoir as a Case Study
%A YUANXing-zhong
%A XIONGSen
%A LIUHong
%A LIBo
%A WANGQiang
%J 重庆师范大学学报(自然科学版)
%P 114-116
%D 2012
%R 10.11721/cqnuj20120321
%X TheThreeGorgesReservoir(TGR)providesthebenefitsoffloodcontrol,electricitygenerationandimprovedtransportationalongtherivercorridor.Forthepurposeoffloodcontrol,thereservoirheightvariesbetween145mand175mabovesealevel,creatingareservoirlittoralzoneofabout350km2intotalareadistributedalongmorethan1200kmofshoreline.MostofthelittoralzoneisfloodedduringOctobertoMayandrelativelydryduringtheremainderoftheyear.WaterlevelregulationhascausedmarkedecologicalchangesinthelittoralzoneofTGR.ThelittoralzoneformedafterimpoundedbyTGRnotonlyisthecrucibletous,butalsotheecologicalopportunity.Thevegetationoflarge-scalehydro-fluctuationbeltisaveryvaluableresource,ifproperlyused,canturnharmintoadvantage.InviewofthecurrentstatusandexistingproblemsofthelittoralwetlandinTGR,weshouldfocusonutilizingresourcesofthelittoralwetlandeco-friendly.Basedontheneedsforthelittoralwetlandtransformintothemultifunctionalecologicaleconomicbenefitsuchasincreasingcarbonsources,biologicalproduction,andenvironmentalpurification,wemustdeveloptheecologicalengineeringmodelofsustainableutilizingthewetlandresourcesofthelittoralzone.InviewoftheenvironmentproblemsofTGRanditscharacteristicsofwaterlevelfluctuation,theecologicalengineeringfocusingonrestorationoflittoralwetlandshavebeencarriedoutsince2008.Theeco-logicalengineeringwasmainlyconductedatlittoralwetlandsinBaijiastreamofPengxiRiverofTGR,includingdike-pondsystem,submergencetolerancewetland-woodsandwaterfowlhabitatsrecreateprojects.Thedesignprincipleandprocessfortheecologicalengineeringoflittoralwetlandsrestorationundertheconditionoftheperiodicwaterlevelchangewasdescribedindetailsinthispaper.Effectsoftheecologicalengineeringandthebenefitstotheenvironmentswereassessed.Intheendofthearticleweproposedthattheecologicalengineeringfocusontherestorationoflittoralwetlands,alsoshouldconsideruti.
%K waterlevelfluctuation
%K littoralwetland
%K ecologicalengineering
%K PengxiRiver
%K ThreeGorgesReservoir
%U http://cqnuj.cqnu.edu.cn/oa/DArticle.aspx?type=view&id=120321