简介：Sand-duststormsaretheresultoftheintegratedinfluencesofclimate,geography,societyandhumanfactors.Atheoreticalframeworkisbuilttoexplainthecoherenceofpopulationgrowth,agriculturechangeandenvironmentaldegradation.Onthebasisoftheanalysisofthecausesofthesand-duststormintermsofhumanfactors,adiscussionwillbegiventoshowthatthesefactorsareinternallyconsistentwiththetheoreticalframework.Afterthat,itwilllookatChina'sAgenda21andtrytofindrelevantmeasurestoreducesuchlargesand-duststormshappeninginNorthwestChinaandeventuallymakethisareadevelopsustainably.

简介：ThemainpurposeofthisstudyistoputforwardareasonableideaofthegeneralprotectionforSingingSandMoun-tainandCrescentMoonSpring,arareanduniquedesertwonder,andofsustainabletourismdevelopmentbasedontheresearchontheecologicalenvironmentaround.Methodsofdocumentation,casestudyandcomparisonwereemployed.Finally,aimingatsolvingtheproblemsofnaturalenvironmentandthoseexistingaftertheexploitationofSingingSandMountainandCrescentMoonSpringtheauthorputsforwardthreemeasures:thecom-prehensivetreatmentforCrescentMoonSpring(broadeningre-sourcesofwaterandreducingexpenditures,checkingthede-creasingdepthofCrescentMoonSpring,andimprovingthegeo-graphicalenvironment),thegeneralprotectionenvisionsforSingingSandMountainandCrescentMoonSpringandestablish-ingadynamicmonitoringandearly-warningsystemofregionalecosystem.