gis技术在泥石流防治工程流量计算中的应用研究——以北川县苏保河为例-research on application of gis technology in flow calculation of debris flow prevention project - a case study of su bao river in beichuan county.docx

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gis技术在泥石流防治工程流量计算中的应用研究——以北川县苏保河为例-research on application of gis technology in flow calculation of debris flow prevention project - a case study of su bao river in beichuan county.docx

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gis技术在泥石流防治工程流量计算中的应用研究——以北川县苏保河为例-research on application of gis technology in flow calculation of debris flow prevention project - a case study of su bao river in beichuan county

关键词：GIS泥石流防治流量计算MATLAB自动提取AbstractApplicationonFlowCalculationofDebrisFlowinControlEngineeringbyGISTechnology——TakeSu-BaoRiverinBeiChuanCountyasanexampleIntroductionoftheauthor：ZengFan-ru,female,wasborninNovember,1985whosetutorwasProfessorHeZheng-wei.ShegraduatedfromChengduUniversityofTechnologyinthenaturalgeographymajorandwasgrantedtheMasterDegreeinJune,2010.AbstractItislikelytoforecastthatpreventingthehazardofdebrisflowonthe“5-12”earthquake-strickenareaisformidablebasedontheexperienceofSong-Panearthquakehappenedin1976.Thecalculationofpeakflowisconsideredtobethekeyparameterofcontrolengineeringindebrisflow,nowadaysitisgenerallytocomputethepeakflowvaluethroughtheequalstreamline’calculationrulewhichisoriginatedfromtraditionhydrology,firstlytheparametersofdebrisflow’drainageareaareacquiredbymeasuringthepapermapsordigitalmapsmanually,then,lookthroughthehydrologyhandbookandfollowtheDrainagebasinmodelstoobtainthefinalpeakflowvalue.ObviouslyitiscomplicatedtocarryoutthisprocessionandtheworkingEfficiencyoraccuracyisdifficulttocertify,andlastitseriouslyaffectthedesignationofcontrolengineering.Inthispaper,theparametersandpeakflowvalueareobtainedautomaticallyandintelligentlybasedonthealgorithmsdevelopedinMATLABandGIStechnology;asaresult,thedesignationofpreventionengineeringfordisastercanbecarriedoutinamoreefficientway.Thestatusofdebrisflowcalculationworkathomeandabroadarebothattheexploratorystage,inordertoestablishahighestaccuracyDEMcalledHc-DEMwhichcanmostlyreflectthetruebasincharacteristics,theauthorhastestedandcertified4calculationmethodstoidentifythebestresolutionofHc-DEMinstudyareabasedoncomprehensivequantitativeanalysisoftopographicindices,andthesinkfillalgorithmin3directionisimplementedinMATLABtoeliminatetheparalleledriverswhichthetraditionmethodcannotdo.Meanwhile,thispaperexploitstheexistingGISspatialanalysisfunctionofthesoftwareandusesdrainagedensityinestimatingthestartingpointtoobtainariverwatershedsthreshold,andtheriverswhicharemoreconsistentwiththeactualofdigitalwat