简介：Itissignificantforthestudyonthesustainabledevelopmentofregionalagriculturetomonitorandmeasurethetrendofagriculturaldevelopmentwithaneffectivemethod.Thesustainabledevelopmentofregionalagricultureshouldaccordwithregionalpopulation,ruraleconomicdevelopment,socialprogress,resourceandenvironmentalsupport.Thispaperestablishestheevaluatingindicatorssystemofsustainabledevelopmentofregionalagriculture,evaluatestheagriculturalsustainabledevelopmentinShaanxiProvincewithacomprehensivemulti-indicatormethod,analyzesthesupportofresourceandenvironmentforregionalagriculturebytheresource-developmentindexandtheenvironment-developmentindex,andgetstheconclusionthattheindicators,suchaseducationlevel,theincomegapbetweenurbanandruralresidents,thepercapitaareaundercultivationandtheconsumptionofpesticidesandchemicalfertilizersperhectare,arethemainfactorstorestrictagriculturalsustainability,andthatthepressureofthedevelopmentofsubsystemsofpopulation,economyandsocietyonthesubsystemsofresourceandenvironmentturnsouttobestrongerandstronger.Agriculturalenvironmentgetsbetter,butresourcebecomesoneoftheimportantfactorstorestrictthedevelopmentofregionalagriculture.Inaword,thispaperhighlightsthepotentialsandlimitationsofsustainableagricultureofShaanxiandhelpsidentifythedevelopmentdirectioninthefuture.

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简介：Climatechangeisaninevitabletrend,whichchallengessecurityofwaterresourcesinChina,especiallyincities.Assessingvulnerabilityofwaterresourcetoclimatechangeincitieshasimportantroleforpolicymakers.Thepaperconstructsavulnerabilityfunction,includingexposure,sensitivityandadaptivecapacity,accordingtothevulnerabilityconceptproposedbyIPCC,establishesanassessmentindicatorssystemofwaterresourcestoclimatechangeincities,andanalyzesvulnerabilityfeaturesofChinesecitesbasedon655cities'datain2006.Thevulnerabilityassessmentresultsshowthattherearedistinctivedifferencesamongallthecities,betweeneast,centralandwestcities,betweenordinary,bigandmegacities,whilethereisnostatisticalsignificantdifferencebetweennorthandsouthcities.Basedontheresearch,thepapersuggeststhatstrategicemphasisshouldfocusonthecentralcitiesandordinarycities

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简介：ThestructureofPb,Zn,CuandCdinleadzincoretailingsoilsinYongzhou,HunanisanalyzedbytheoptimizedBCRsequentialextractionprocedure.Thecontentandproportionofheavymetalsoftheminearemeasured.Meanwhile,theecologicalrisksareevaluatedwiththeLarsHakanson’spotentialecologicalriskexponentialmethod.Theanalysisshowsthatthecontentofheavymetalsisveryhigh,reachingthelevelofseriouspollution.TheorderofmetalpollutiondegreesareCd>Pb>Cu>Zn.Ontheotherhand,itisverypossiblethattheheavymetalsmaycombinetogetherascompoundsorclingtothecrystalformofclay.Sincetheformofsolubleacidandfreemetalsareverylittle,itisnotaneasyjobformetalelutingorrestorationofplants.Yetitispossibletotakeoutthoseheavymetalsadoptingthechemicalextractiontechnology.DTPAandEDTA,indicatedbyaresearch,bothhaveiterativevalueandstrongconformityeffect.Sotheyareeffectiveelutriantstorestorethepollutedsoil.Achemicalextractionmethodisputforwardinthispaper.

简介：SinceKyotoProtocolcameintoforceonFebruary16,2005,theendeavorbyinternationalsocietytocombattheclimatechangehassteppedintoanewmilestone.Thegreenhousegas(GHG)abatementmechanismsinKyotoProtocolhaveservedaremarkablefunctionbutalsobeenquestionedduringthepracticesofpastthreeyearsaboutitsenvironmentaleffectiveness.AlotofnewinternationalGHGemissionreductionproposalsareproposedfrommanynewaspects,someofwhichespeciallyimposepressureondevelopingcountries.SoitisofgreatimportancetoresearchonthesenewproposalsintimefornegotiationbeyondKyotoandinstitutionofChineserelevantclimatepolicies.Asthispaperfocusesonthewayofcommitmentdistributionofmechanisms,themechanismsherearecategorizedinoneoftwotypes:thosedistributecommitmentbasedoncountriesandthosebasedonsectors.Someofthetypicalmechanismsareselectedtobeanalyzedcomparatively,especiallyabouttheirinfluenceondevelopingcountries.

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简介：Mountainousregionsfaceaseriesofconflictsbetweenthenaturalresourcesconservationandtheeconomicdevelopment,especiallyinprotectedareas,wherearethehometosomeofthepoorestpeopleintheworld.InChina,theProtectedAreasAuthorities(suchasProtectedAreasAuthoritiesofWuyiMountain)transferredthemountainouspeopleoutoftheprotectedareas.Wefoundthatitisnotagoodapproachofimmigrationproject,asfaraseconomicandecologicaleffectisconcerned.Althoughremoteandmajesticbeautyattractedmanytourists,masstourismisnotagoodapproachtosolvethedevelopmentprobleminmountainousareasbecauseitcannotprovideenoughopportunitiestomakelocalpeopleliveacomfortablelife,andthehighvolumeoftouristsindicatesthattheresourcesfacesignificantthreats.Becausemanylandscapesarerunbyprivateenterprises,localresidentsandgov-ernmentonlygetlimitedbenefits.Althoughecotourismprinciplesexpatiateoneconomicdevelopmentandresourcesconservation,localpeopleincomeandtouristsfeelings,ithasdiscordancebetweenthetheoryandthepractice.Therefore,thetermof'integratedecotourism'wascoinedinthepaperbasedontheecotourismtheory.Integratedecotourismmeansabroadlytourismresourcesandpendulumspatialpatternwhichwillcomeintobeingwiththemovementoflocalpeopleandtouristsfromprotectedareastothenearbytownorcity;anditalsotriestosolvethepropertyrightconflictofmountainlandbetweenthelocalpeopleandtheprivateenterprisesaccordingtopropertyrighttheory.