城鎮(zhèn)地質(zhì)災(zāi)害風(fēng)險(xiǎn)調(diào)查評(píng)價(jià)斜坡單元?jiǎng)澐址椒ㄑ芯?/h1>
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中圖分類號(hào)：P642 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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(zhì)災(zāi)害風(fēng)險(xiǎn)調(diào)查評(píng)價(jià)通常為選取某種評(píng)價(jià)單元，對(duì)某一特定區(qū)域，在某種特定條件下發(fā)生地質(zhì)災(zāi)害時(shí)造成的人員、經(jīng)濟(jì)等損失的可能性預(yù)測(cè)。（剩余3743字）