城鎮(zhèn)地質災害風險調查評價斜坡單元劃分方法研究

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中圖分類號：P642 文獻標志碼：A 文章編號：2095-2945（2025）19-0144-05

Abstract：Throughtheivestigationofslopeunitdivisionmethodsandaplication，wecolecteddataonthequalityandeicincyof slopeunitdivisionfrom15projectgroups，andanalyedthatthemainreasonsforthepoorqualityandloweficiencyofslopeunitdivision are DEM data accuracy，division method，and threshold setting.Aiming at the above reasons： ① 5，8，and 12.5 m precision DEM data are used respectively; ② Global Mapper software optimizes the slope unit division method; ③ Compare the countermeasures for dividing the 1000，2000，Oo4，O00，ndotresldvluesinhsmearea.nalltatisticalalysisasedoutby comparingtheareadistributionof slopeunits，perimetersquareandarearatio.Atthesametime，therationalityandtimeconsumptionof 15projectgroups todivideslopeunitswerecounted.Theresultsshowthattheimprovementofslopenitdivisionmethodissimpleand easytooperate，andhasgoodqualityandeconomicbenefits.Itcanmettherequirementsofurbangeologicaldisasterisksurveyand evaluationprojectsfurterimproveteaccuracyofevaluatiosultsndbeerprovidesupportforgologicaldisasterskautio.

Keywords：slope unit; geological disaster;ArcGIS；Global Mapper;risk investigation and evaluation

城鎮(zhèn)地質災害風險調查評價通常為選取某種評價單元，對某一特定區(qū)域，在某種特定條件下發(fā)生地質災害時造成的人員、經(jīng)濟等損失的可能性預測。（剩余3743字）