20508.基于ca模型的小江流域水蝕荒漠化變化趨勢研究

1、扉頁：獨(dú)創(chuàng)性聲明本人聲明所呈交的論文是我個人在導(dǎo)師指導(dǎo)下進(jìn)行的研究工作及取得的研究成果。除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人或集體已經(jīng)發(fā)表或撰寫過的研究成果，對本文的研究做出貢獻(xiàn)的集體和個人均己在論文中作了明確的說明并表示了謝意。研究生簽名：、一切劃內(nèi)寺、論文使用和授權(quán)說明日期：列多gI弓本人完全了解云南大學(xué)有關(guān)保留、使用學(xué)位論文的規(guī)定，即：學(xué)校有權(quán)保留并向國家有關(guān)部門或機(jī)構(gòu)送交學(xué)位論文和論文電子版；允許論文被查閱或借

2、閱；學(xué)?？梢怨颊撐牡娜炕虿糠謨?nèi)容，可以采用影印、縮印或其他復(fù)制手段保存論文。(保密的論文在解密后應(yīng)遵循此規(guī)定)研究生簽名：型墾＆煎∑導(dǎo)師簽名：一＼7日期：矽／多‘侈本人及導(dǎo)師同意將學(xué)位論文提交至清華大學(xué)“中國學(xué)術(shù)期刊(光盤版)電子雜志社”進(jìn)行電子和網(wǎng)絡(luò)出版，并編入CNKI系列數(shù)據(jù)庫，傳播本學(xué)位論文的全部或部分內(nèi)容，同意按《中國優(yōu)秀博碩士學(xué)位論文全文數(shù)據(jù)庫出版章程》規(guī)定享受相關(guān)權(quán)益。研究生簽名：盈導(dǎo)師簽名：日期：巡侈ABSTRACTA

3、satypeofdeserfification，watererosiondesertificationlargelyreflectstheregionalsoilerosionanddeteriorationoflandqualityTheresearchofwatererosiondesertificationpresentsituationandchangetrendnotonlycomplywiththegoalof”ecolog

4、icalcivilizationconstruction”fowardedbythe18thNationalPartyCongress，butalsorelatedtothesustainabledevelopmentofsocialeconomy。InthispapertheXiaojiangriverbasininwhichwatererosiondesertificationdevelopsveryseriouslywaschos

5、eastheobjectThedistributionsituationandchangesofwatererosiondesertificationdatain1975and2000and2008inXiaojiangriverbasinwasveryfullycollectedFirstly，therelationshipbetweenwatererosiondesertificationandthelithology，remote

6、sensinglineament，elevation，slope，gullydensity，precipitationwereanalyzeddeeplyThecontrolconditionofwatererosiondesertifieationdevelopmentevolutionwereRevealedThirdlythispapersimulateswatererosiondesertificationdistributio

7、nin2008basedonwatererosiondesertificationin1975and2000withCA—MarkovmodelThemodelaccuracywasevaluatedbytheactualsurveyofwatererosiondesertificationin2008。ThemodelparameterswereoptimizedFinallytheoptimizedmodelissuccessful

8、lyappliedtopredictwatererosiondesertificationinXiaojiangriverbasinin2015TheresearchresultsshowthatthecorrelationbetweenwatererosiondesertificationandfracturestructureandsurfacegullydensityishighinXiaojiangriverbasinSegme

9、ntationrelationsbetweenwatererosiondesertificationdevelopmentandthelithology，elevation，slopefactorareclearTheresultsofwatererosiondesertificationsimulationandprediction、^，ithCAMarkovmodelishigherreliabilitywhichKappacoef

10、ficientwas06468betweenthesimulationresultsofthe2008andtheactualsituationin2008From2008to2015，thechangeofwatererosiondesertificationwillbemainlydeepenedItmainlyshowsthatnowatererosiondesertificationtomildwatererosiondeser

11、tificationandheavywatererosiondesertificationareaiSincreasedThekeytopreventandcontrolwatererosiondesertificationisslopingfieldsonbothsideofXiaojiangRiverinthenorth，alsotheupstreamareainthesouthTosumup，thisarticle’Sresear