土地利用類型對花崗巖紅壤區(qū)坡面土壤侵蝕量的影響——以湖南省衡陽縣武水流域為例.pdf

1、湖南師范大學碩士學位論文土地利用類型對花崗巖紅壤區(qū)坡面土壤侵蝕量的影響——以湖南省衡陽縣武水流域為例姓名：賴奕卡申請學位級別：碩士專業(yè)：水土保持與荒漠化防治指導教師：韓廣20080501ABSTRACTModemsoilerosioniSadynamicprocessundernatureandhumanactivities，andbecomeoneofmainproblemofresourcesandenvironmentnowada

2、ysThesoilerosiononslopenotonlycauseslandfragmentationandecologicalimbalancebutalsoleadstosedimentdepositioninriverlakeandreservoirThedamageismoreseriousinredsoilareawithgraniteTheresearchismadeinWushuibasinofHengyangCoun

3、tyHunanAndthesoilpropertieswereinvestigatedinwoodlands，openwoodlands，abandonedlands，slopingfarmlands，anddrylands，respectivelyThesoilanti—erodibilitywasanalyzed，andthefeaturesofrunoffandsedimentwerestudiedinfivelandusetyp

4、esin19precipitationeventsTheregressionequationsofrunoffandsoilerosionbasedonrainfallcharacteristicparameterswereestablishedThelawofsoilandwaterlosswasobtainedaboutfivelandusetypesTheresultsofthisthesisCanprovidescientifi

5、cbasesforlocallandusemanagementTheresultsshowedthat：1)TheeffectoflandusetypesonsoilpropertiesareobviousComparedwithabandonedlands，drylandsandslopingfarmlands，boththesoilbulkdensityandthesandcontentsaresmallerwithrespectt

6、othecontentsoflargewaterstable—aggregatesincreasing，whilecapillaryporosityandwatercapacityareenhancedforwoodlandsandopenwoodlands2)Therearesignificantdifferencesinsoilanti—erodibilityindifferentlandusesTheorderofthePCAan

7、alysiscomprehensiveindexiswoodlands，openwoodlands，abandonedlands，slopingfarmlands，anddryland3)TheamountofwaterandsoillossisdifferentinfivelandusetypesinprecipitationeventsTheabandonedlandsrankedfirst，followedbyslopingfar