1、華中農(nóng)業(yè)大學(xué)博士學(xué)位論文小流域綜合治理模式研究姓名：趙愛(ài)軍申請(qǐng)學(xué)位級(jí)別：博士專(zhuān)業(yè)：農(nóng)業(yè)經(jīng)濟(jì)管理指導(dǎo)教師：李崇光20050501華中農(nóng)業(yè)大學(xué)20雌屆博士學(xué)幢論文AbstractWaterisoriginoflife，soilisrootofthesurvivalWaterandsoilresources，thebasicconditionsforhuman’ssurvivalanddeveloparebasicresourcescould

2、notbereplacedBeingadevelopingcountrywithlargepopulation，andwaterandsoilresourcespercapitaisrelativelyscarce，Chinahavetofeed22％oftheworldpopulationwithonly7弼oftheworldfarmlandWaterresourcesharepercapitainChinaisonly2，200m

3、3，whichisequalto32％oftheworld’Saverage，itisnearlyapproachingtOinternationallyacceptedalertlineWaterandsoilresourcesdeficiencyisaprimaryproblemwearefacinginourcountry’SdevelopmentSoilerosionisoneofthemainreasonsthatourcou

4、ntry’SwaterandsoliresourcesweredestroyedAtpresenttheareaofwaterandsoilerosioninChinais3，560，0130km2，whichaccountsfor37弼ofourcountry’Sterritorialarea。Theseverewaterandsoilerosionlcadsthecroplanddecreased，theproductivityof

5、farmlanddropped，ecosystemunbalancedandfloodanddroughtdisasterfrequentappeared。Thesumoflostsoilannuallyisupto5billionton，whichmeansthat66，700hm2oftillagelayerwaslost，thishasretardtheprogressofsustainabledevelopmentoftheag

6、riculture?；economiclosscausedbysoilerosionisover10billionRMBeveryyearinChina，andsoilerosionhasbecomeChina’SnumberoneenvironmentalproblemThereforeit’sallinevitablechoiceforChina’Ssustainabledevelopmenttocarryoncomprehens

7、ivecontrolonwaterandsoilerosioninunitofsmallwatershedTheresearchoncomprehensivecontrolmodelinsmallwatershedisacomplicatedsystemsproject，itisnotonlyatechnicalproblem，itisalsoimportanttoorganizeandcoordinaterelationshipofe

8、verycomponentinthesystemWeshouldstudytheproblemofcomprehensivecontrolinsmallwatershedinsystemthinkingandanalyzeitspresentobstaclesinmanagementsystemandtechnologyInordertoacceleratetheprogressandenhancethelevelofpreventio

9、nandcontrolofwaterandthesoilerosion，weshouldexploreandestablishthenewcomprehensivecontrotmodelinsmallwatershedfromseveralaspectssuchaslegalpolicycapitalinvestment，techniquesupport，evaluationofharnesseffect，roleofnation，p

10、easantsandsocialorganization，etc。ltneedsmanysubjects’supportincludingagriculture，forestry，animalhusbandry，ecology，resourcescience，environmentalscienceandsocialscience。Hence，weshouldfurtherresearchesonthecomprehensivecont

11、rolmodelofsmallwatershedfromsystemicandintegratedangle，especiallyresearchesoncouplingruleofvariouselements，optimizationplanningonstructureandobjectiveevaluationmethodsshouldbestrengthenedThispaperappliedprincipalandmetho