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EvolutionlawofwatersurfaceareaintheBeijing - Tianjin - Hebeiplainfrom 1985to2020
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WANGQingming,ZHANGYue,DOUPeng,ZHAOYong,LIEnchong,MAMengyang
(1.ChinaInstituteofWaterResourcesandHydropowerResearch,Beijing 100038,China;
2.GeneralInstituteofWaterResourcesandHydropowerPlanningandDesign,MinistryofWaterResources,Beijing 100120,China;
3.BeijingWaterScienceandTechnologyInstitute,Beijing 100048,China)
Abstract:Undertherequirementofthenationalrecoveryoftheecologicalenvironmentofriversandlakes,the
analysisofthehistoricallongseriesofwatersurfaceareachangesintheBeijing - Tianjin - HebeiPlainareaandthe
causesofchangesishelpfulforscientificformulationofregionalecologicalwaterrechargeandpredictionofwater
rechargeeffect.Inthisstudy ,thewaterareaoftheBeijing - Tianjin - Hebeiplainwasdeterminedbythreeperiods
oflandusedatafusion.ThewatersurfaceareaoftheBeijing - Tianjin - Hebeiplainfrom1985to2020wasextracted
basedonGEE(GoogleEarthEngine)cloudplatform,andthefillingrateofwaterareaandthereasonfortheevo
lutionofwatersurfaceareawereanalyzed.TheresultsshowthatthewatersurfaceareaoftheBeijing - Tianjin -
HebeiPlainhasbeenincreasingsince1985 ,andthefillingrateofthewaterareahasincreasedfrom1985to2020.
Ecologicalwaterrefillisthemainreasonfortheincreaseofthewatersurfaceareaoftheriverandlake.In2020,
2
thewatersurfaceareaofthecentralplainhasincreasedby176km comparedwith2001.Thecontributionoflocal
andexternalecologicalwaterreplenishmentaccountedfor84%.Aimingattherecoveryofriversandlakes ,differ
entscenariosweresetupfromtheperspectiveofwaterareafillingrate ,andtheecologicalwaterrequirementsofriv
ersandlakesunderdifferentscenarioswereestimatedrespectively.Theresearchresultssystematicallyanalyzedthe
watersurfacestatusandtheeffectofecologicalwaterreplenishmentintheBeijing - Tianjin - HebeiPlain ,whichisof
greatsignificanceforcarryingoutreasonableriverandlakerecoverymeasuresintheBeijing - Tianjin - HebeiPlain.
Keywords:waterbodiesspace;watersurfacearea;GEEcloudplatform;fillingrate;ecologicalwaterdemand
(责任编辑:于福亮)
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