城镇地质灾害风险调查评价斜坡单元划分方法研究

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中图分类号：P642 文献标志码：A 文章编号：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

城镇地质灾害风险调查评价通常为选取某种评价单元，对某一特定区域，在某种特定条件下发生地质灾害时造成的人员、经济等损失的可能性预测。（剩余3743字）