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1、LandUseChangeandEffectsonWaterQualityandEcosystemHealthintheLakeTahoeBasin,NevadaandCaliforniaByWilliamForney1,LoraRichards2,KennethD.Adams3,TimothyB.Minor3,TimothyG.Rowe4,J.LaRueSmith4,andChristianG.Raumann1OPEN-FILEREPORT01-4182001Anyuseoftrade,product,
2、orfirmnamesisfordescriptivepurposesonlyanddoesnotimplyendorsementbytheU.S.Government.U.S.DepartmentoftheInteriorU.S.GeologicalSurvey___________________________1U.S.GeologicalSurvey,MenloPark,California2Raytheon,workperformedunderU.S.GeologicalSurvey,Contr
3、act1434-CR-97-CN-40274313DesertResearchInstitute,UniversityandCommunityCollegeSystemofNevada,Reno,Nevada4U.S.GeologicalSurvey,CarsonCity,Nevada31LandUseChangeandEffectsonWaterQualityandEcosystemHealthintheLakeTahoeBasin,NevadaandCaliforniaABSTRACTHumanact
4、ivityintheLakeTahoeBasinhasincreasedsubstantiallyinthepastfourdecades,causingsignificantimpactsonthequalityandclarityofthelake'sfamousdeep,clearwater.ProtectionofLakeTahoeandthesurroundingenvironmenthasbecomeanimportantactivityinrecentyears.Avarietyofagen
5、cies,includingtheTahoeRegionalPlanningAgency,TahoeResearchGroupoftheUniversityofCaliforniaatDavis,DesertResearchInstituteoftheUniversityandCommunityCollegeSystemofNevada,U.S.GeologicalSurvey(USGS),andahostofState(bothNevadaandCalifornia)andlocalagenciesha
6、vebeenmonitoringandconductingresearchintheBasininordertounderstandhowthelakefunctionsandtowhatextenthumanshaveaffecteditslandscapeandecosystemprocesses.Inspiteofalloftheseactivities,thereremainsalackofcomprehensivelandusechangedataandanalysisfortheBasin.A
7、projectisunderwaythatunitesthelandcovermappingexpertiseoftheUSGSNationalMappingDisciplinewiththehydrologicexpertiseoftheWaterResourcesDisciplinetoassesstheimpactsofurbangrowthandlandusechangeintheLakeTahoeBasin.Threeactivitiesareplannedoverthenext3years:(
8、1)mappingthecurrentandhistoricstateofthelandsurface,(2)conductinganalysistodocumentpatterns,rates,andtrendsinurbanization,landusechange,andecosystemhealth,and(3)assessingthecausesandconsequencesoflandusechangewithre
