12355.基于gis洋縣地質(zhì)災(zāi)害危險性區(qū)劃研究

1、論文題目：基于GIS洋縣地質(zhì)災(zāi)害危險性區(qū)劃研究專業(yè)：地質(zhì)工程碩士生：王振雷(簽名)指導(dǎo)老師：楊梅忠(簽名)摘要洋縣位于秦嶺主脊南坡腹地紫柏山南麓。近年來，由于區(qū)內(nèi)地質(zhì)環(huán)境條件差且伴隨著降雨、地震及人類工程活動等不良因素的影響，縣區(qū)地質(zhì)災(zāi)害呈明顯上升趨勢，嚴(yán)重威脅著人民的生命財產(chǎn)安全。地質(zhì)災(zāi)害危險性區(qū)劃是通過對地質(zhì)災(zāi)害未來發(fā)生的可能性及危害范圍進行預(yù)測，圈定出地質(zhì)災(zāi)害的危險區(qū)域，不僅可以減少和避免地質(zhì)災(zāi)害對人們生命財產(chǎn)的危害，指導(dǎo)洋縣移民

2、搬遷選址工作，同時為洋縣經(jīng)濟發(fā)展規(guī)劃與生態(tài)環(huán)境保護提供科學(xué)的參考依據(jù)。本文依托于陜西省地質(zhì)調(diào)查院下達洋縣等13縣地質(zhì)災(zāi)害野外調(diào)查任務(wù)，通過對洋縣地質(zhì)環(huán)境條件，地質(zhì)災(zāi)害發(fā)育等情況的實地調(diào)查和研究，總結(jié)出縣域地質(zhì)災(zāi)害發(fā)育的類型、特征及規(guī)律，篩選出地形坡度、地貌類型、巖土體類型、地質(zhì)構(gòu)造、植被覆蓋率、年均降雨量、人類工程活動7個主要因素指標(biāo)。以GIS為技術(shù)支撐，建立了洋縣地質(zhì)災(zāi)害危險性區(qū)劃評價指標(biāo)體系，實現(xiàn)了各評價指標(biāo)的量化處理，通過對地質(zhì)災(zāi)

3、害危險性區(qū)劃方法的比對和研究，最終選取了信息量法作為洋縣地質(zhì)災(zāi)害危險性評價模型。同時，建立了洋縣空間數(shù)據(jù)庫，完成了各評價因子圖層的提取及柵格化，將縣區(qū)按1km1km的規(guī)則網(wǎng)格劃分為3429個單元。結(jié)合信息量評價模型，在建立洋縣地質(zhì)災(zāi)害空間數(shù)據(jù)庫的基礎(chǔ)上借助MAPGIS軟件輸入編輯、屬性庫管理、空間分析、工程輸出等功能對評價因子指標(biāo)的不同狀態(tài)進行信息量計算，通過空間疊加分析最終得到各評價單元的綜合信息量值，實現(xiàn)了洋縣地質(zhì)災(zāi)害危險性區(qū)劃。將

4、全區(qū)分為地質(zhì)災(zāi)害高危險區(qū)、中危險區(qū)、低危險區(qū)和極低危險區(qū)4大區(qū)14個亞區(qū)，并繪制出了洋縣地質(zhì)災(zāi)害危險性區(qū)劃圖。關(guān)鍵詞：地質(zhì)災(zāi)害；危險性區(qū)劃；GIS；信息量法研究類型：應(yīng)用型Subject:ResearchonGeologicalDisasterRiskZoneinYangCountyBasedonGISSpecialty:GeologicalEngineeringName:WangZhenLei(Signature)Instruct:Y

5、angMeizhong(Signatrue)ABSTRACTYangCountyislocatedinthehinterlofthesouthernslopeoftheQinlingmainridge.InrecentyearsduetothepoconditionsoftheregiontheadversefactssuchasrainfallearthquakeshumanengineeringactivitiesGeologica

6、ldisastersinYangCountyshowedaclearupwardtrend.Itisaseriousthreattothelivespropertyofthepeople.Geologicalhazardzoningisthroughtherangeofpossibilitieshazardsofgeologicaldisastersoccurinthefuturetopredicttheriskarea.Itisnot

7、onlyusedtoreduceavoidthehazardsofgeologicaldisastersonpeopleslivespropertyguidethewkofYangCountyrelocationsitebutalsotoprovidescientificbasisfYangCountyeconomicdevelopmentplanningenvironmentprotection.Thispaperreliesonth

8、eGeologicalSurveyofYangCountyShaanxiProvince.ThroughthereganizationoftheinvestigationresultsofgeologicalenvironmentgeologicalhazardsconditionsinYangCountythispaperhasobtainedthethetypesacteristicslawsofthegeologicalhazar

9、dsinYangCounty.Basedonthesubtopic—“TheacteristicslawsofthegeologicalhazardsinYangCounty”Thispaperhasedterrainslopelfmengineeringgeologicalrocksgeologicalstructurevegetationcoveragetheaverageannualrainfallhumanfactsengine

10、eringactivitiesthesevenmajindexes.WiththeGIStechnicalsupptThispaperhasestablishedYangCountygeologicalhazardevaluationsystemultimatelyedtheinfmationquantitymethodtoachievegeologicalhazardzoning.MeanwhileThispaperhasestabl

11、ishedYangCountyspatialdatabasecompletedtheextractionoftheevaluationfactsrasterizedlayer.Asaresultthatthecountyrulesby1km1kmgridisdividedinto3429units.CombinedtheinfmationquantitymethodwiththeYangCountyspatialdatabasethis

12、paperobtainstheinfmationquantityofthesevenmajindexesindifferentconditionsfinallygetsthecomprehensiveinfmationvaluesfeachevaluationunittoachievethegeologicalhazardzonationbymeansofMAPGISsoftwareinputeditingpropertydatabas