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1、http://www.paper.edu.cnHydraulicconductivitydeterminationandleakagelossestimation,acasestudyofBeitangreservoirLIWeiCollegeofWaterResourcesandEnvironmentHohaiUniversity,Nanjing,210098，Chinasliv@hhu.edu.cnAbstractThemagnitudeofleakagelossofBeitangreservoir,TianjinCity,wasdet
2、ermined;thiswasoneoftheobjectivesofthestudy.TheAlyamani&SenEquation,whichisanempiricalequationbasedonrepresentativegrain-sizedistributionparameters,wasusedinhydraulicconductivity,K,determinationandKrigingmethodwasappliedtoestimatingthespatialvariationofpermeabilityoftheres
3、ervoirbed.Theresultsshow-5-1thattheaverageKvaluesofthereservoirbottomsedimentis3.96×10cms,the3-1leakagelossestimatedbyDarcyequationis1375.87md,andthenorthcentralpartofthereservoirdisplayshigherriskofleakageloss.TheresultsindicatethatthemethodofdeterminingKbyusinggrain–size
4、distributionanalysisandAlyamani&SenEquationissuitablefortheareawiththesimilarcondition,andcouldprovidesomeusefulsuggestionsforthefuturework;especiallywhenthetraditionalmethodwerecouldn’tused.Keywords:hydraulicconductivity;groundwater-surfacewaterinteraction;reservoirbottom
5、sediment;grain–sizedistributionanalysis1STUDYAREA1.1IntroductionTheBeitangreservoir,whichisaplainreservoir,liesbetweenlongitude117°38′Eand117°41′E,latitude39°06′Nand39°08′N,eastofnorthernChinaplain,westcoastofBohaiSea,andthelower2courseofYongdingRiver(Fig.1).Itcoversanarea
6、ofabout7.31km,2.2～3.1kmlonginnorthandsouth,2.5～2.8kmwideineastandwest,andwithadamof8.5mhigh.ThewaterlevelofBeitangreservoirrangesfrom5.6to7.1m,whichismuchhigherthanbothshallowgroundwaterandtheadjacentgroundsurface,whichvariesfrom2.7to5.5m.Consequently,thewaterinthereservoi
7、rseepstorechargetheadjacentgroundwater.43Before2002,thewaterlossofthereservoir,includingleakagelossandevaporation,was7.0×10min73threedaysaveragely,istoomuchcomparedwiththetotalvolume,1.58×10m,respectively.WatershortageinthecoastalareaofTianjinCityhasnecessitatedtheplanning
8、andimplementationoftheBeitangreservoirasmeansofregulatingwatersupplyandasastandbyreservoi
