简介:Aimingrespectivelyatthetwoproblemsindesertiflcationareas,namelywatershortageandserioussoilerosion,thepolymermaterialsforcombatingdesertiflcationmaybeclassifiedaswaterabsorbing-retainingpolymers(WARPs)andsandysoilstabilizingpolymers(SSSPs).Theirfurtherclassificationsandcurrentresearcflsituationswereintroduced.ItissuggestedthatthemajorhindrancefortheirwideappHcationisthehighcost.Theauthors'newestresearchresuitsoncuttingcostandenhancingef...
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简介:一个大问题在世界上影响大多数这些国家的Desertification过程。这个过程在干旱、半干旱的区域有高率。今天,人的社会作为引起各种各样的不可弥补的损坏到经济、社会的部门的一个严重问题正在遇到desertification现象。为了在另一个区域为他们的申请在不同地区性的模型的生产估计desertification结果,索引应该是re-investigated并且适应本地条件。几个模型为desertification评估被开发了。现在的学习,估计desertification过程在一个区域有的份量上的尝试在伊朗平凡的Sistan定位了(是的Niatak区域案例研究)由使用修改MEDALUS方法。获得的结果显示了整个学习区域的(包括4819.6英亩),2651.56英亩(55%)位于中等desertification紧张班,1269.48英亩(26.34%)在严重desertification紧张班上被放,并且898.54英亩(18.64%)被放在改变严重desertification紧张班。
简介:在Bashang区域的自然条件被容易被自然灾难影响并且加强了人的活动的带的转变描绘。极其易碎的eco环境也是容易的把desertification形成并且发展。在从1978~1996的18年里,在地图的范围以内的Bashang的desertified陆地区域将近加倍,2199.11km的全部的增加,每年平均122.17km2的增加。而且,严重,desertified区域很快增加。在Bashang的陆地desertification是自然因素和荒谬的人的经济活动的联合结果。栽培陆地扩大,人口生长,和过度放牧的aggrevatedesertification开发。
简介:Basedonasystematicanalysisaboutthedesignprinciples,systematicobjectives,clients'demandsandfunctionalmodulesoftheregionalkarstdesertificationdisasterinformationsystem,asystematicapplicationplanwasproposedinthispaperthatthemainstreamtechnologieslikeCOMGIS,etc.canbeusedforsecondarydevelopment,andDu'anYaoAutonomousCountyofGuangxiwastakenasanexampletoillustratetheapplicationofgeographicalinformationsystemindevelopmentofkarstdesertificationdisasterinformationsystem,andtoprovideafeasibleplanforrealizationofaccessorydecisioninformationaimingforsustainabledevelopmentofkarstdesertificationarea.
简介:ThelinkbetweenclimatechangeanddesertificationisanimportantglobalproblemfortheUnitedNationsFrameworkConventiononClimateChange(UNFCCC)andtheUnitedNationsConventiontoCombatDesertification(UNCCD).ThecoastalprovincesinSouthernCentreVietnamarestronglyinfluencedbydesertification,whichisfurtherexacerbatedbyclimatechange.TheDelphimethodwasusedtoselectsustainabilityindicatorsandthenamethodofananalyticalhierarchyprocesswasappliedtoprioritizesustainablesolutionsinBinhThuanexpertstoelicitthecausesandeffectsofdesertification.Accordingtothepanelof23experts,27cause(e.g.rainfallandsunshineduration)and22effect(e.g.riceandagriculture)indicatorswereofparticularimportancetodesertificationanddroughtintheprovince.Thehighestprioritiesforcausearegiventoemigration,followedbyincomefromindustryandwatersupplyforhouseholduse.Thehighestprioritiesforeffectintheareaaregiventosocioeconomiccriteria,andinparticulartothesub-criteriaresettlementduetodevelopmentprojects,buildinghydropowerreservoirs,andimplementingirrigationschemes.Thesystemofindicatorsprovidesusefulinformationforthefuturestudies.Thisstudyprovidesameanstouncoverthemostimportantcriteriaperceivedasmajorcontributorstodesertificationandassuchenablespolicy-makerstoprioritizesolutionsforBinhThuan(Vietnam)by2015andavisionin2020.
简介:ThewestsandylandoftheNortheastChinaPlainislocatedintheeasternhugesandybeltofmid-latitudeinEurasiaandtheeasternfringeofdesertifiedlandwithbestbio-climaticconditionsinChina.Withrapideconomicdevelopment,thedeteriorationofeco-environmenthasoccurredandthedesertificationbecomesveryobvious.Thefirstpartofthispaperstudiestheregionaldifferencesoflandscapepatternsandexplorestheregionaldifferencesofdesertification.Thesecondpartaimstorevealthedynamicsofdesertificationinthe1990sbyusingNOAA/AVHRRdataandthematicdatainGISdatabase.Thisworklaysascientificbasisfortherehabilitationanddevelopmentofthesandylands.
简介:Vietnamisacoastalcountryprojectedtobeheavilyaffectedbyclimatechange.BinhThuanProvinceispartofthedriestregionofVietnamandispronetodesertification.AnexpertpanelparticipatedindevelopingaLeopoldmatrixwhichallowedforidentificationofdesertificationimpactfactorsontheprovince’ssocioeconomicactivitiesandassessmentofthestrengthofcause-effectrelationshipsintermsofmagnitudeandimportance.Landuseplanning,surfacewater,andthelengthofthedryseasonareconsideredthemostimportantcauses,withtheoverallhighestscoresforbothmagnitudeandimportanceinthecause-effectrelationship.Thelargesteffectsofthedifferentfactorsareperceivedonwatersupplyforagricultureandhouseholduse.Wateravailabilityandlanduseplanningareimportantremedialactiondomains,whiledroughtandlandcoverrequiremonitoringtoassessimpacts.Theindicatorsofcauseandeffectcanbeusedinalonger-termgeneralmonitoringandassessmentframeworktocombatdesertificationinthearea.
简介:ThiscasestudyoutlinestheproblemsfacedbythepeoplesoftheHexiCorridor.Theseproblemsareseriousandurgent,andarerepresentativeofthosefacedbyothercommunitiesrightacrosswesternChina.Therootcausesareoutlinedandsomeremediesaresuggested.ThepracticalmeasuresproposedunderChina'sNationalActionPlantoCombatDesertificationaredescribedanddiscussed.
简介:ThepolicyoftheChinesegovernmentconcerningthehorizontalexpansionofthecultivatedlandthroughthereclamationofdesertsoilsresultinatotalincreaseof665.985km2duringtheperiod1987-1999inNorthShaanxi.Thisincreaseislessthanthelossinarablelandbyurbanization.Theacceleratedrateofchangeinagriculturalareascallsformorerapidsurveysofurbanizationandlossofarableland.Remotesensinghasanumberofadvantagesoverground-basedmethodsforsuchsurveys.Themulti-scaleconceptofremotesensingdatahelpusstudytheprobleminfourtowns.Severalmapswereproducedtoanalyzethesituationofurbancoverageindifferenttimes.Theevaluationofthestatus,rateandriskofurbanizationarebasedonanacceptedaverageofurbanincreaseas2%ofpopulationgrowthperyear.