基于GIS技術(shù)和頻率比模型的三峽地區(qū)秭歸向斜盆地滑坡敏感性評價(jià)
發(fā)布時(shí)間：2018-07-20 19:12
【摘要】：以三峽地區(qū)秭歸向斜盆地為研究區(qū),在野外滑坡編圖的基礎(chǔ)上,選擇地形坡度、地層巖性、河流、道路、坡向、坡型結(jié)構(gòu)6個因子參與滑坡敏感性評價(jià),運(yùn)用GIS空間分析技術(shù),引入頻率比模型,分別計(jì)算評價(jià)因子的貢獻(xiàn)率,并進(jìn)行疊加分析,最終劃分為4個敏感性分區(qū)。評價(jià)結(jié)果表明:極高敏感性區(qū)面積占21.39%,滑坡發(fā)生面積占61.44%;高敏感性分區(qū)面積占24.99%,滑坡發(fā)生面積占21.67%;中敏感性分區(qū)面積占30.66%,滑坡發(fā)生面積占13.19%;低敏感性分區(qū)面積占22.93%,滑坡發(fā)生面積占3.69%�；旅舾行悦娣e累計(jì)百分比曲線圖表明評價(jià)結(jié)果具有較高的準(zhǔn)確度和可靠性。研究成果可為政府部門減災(zāi)防災(zāi)工程提供科學(xué)支持,為滑坡災(zāi)害的預(yù)測和管理提供科學(xué)依據(jù)。
[Abstract]:Taking Zigui syncline basin in the three Gorges area as the study area, based on the mapping of landslide in the field, six factors, including terrain slope, stratigraphic lithology, river, road, slope direction and slope structure, are selected to participate in the landslide sensitivity evaluation, and GIS spatial analysis technique is used. The frequency ratio model was introduced to calculate the contribution rate of the evaluation factors, and the superposition analysis was carried out. Finally, four sensitive zones were divided. The results show that the area of extremely high sensitivity area is 21.39, the area of landslide occurrence is 61.4444; the area of highly sensitive zone is 24.99, the area of landslide occurrence is 21.67; the area of middle sensitive zone is 30.66, the area of landslide occurrence is 13.19; the area of low sensitive zone is 24.99; the area of landslide occurrence is 21.67; 22.93, the area of landslide is 3.69. The cumulative percentage curve of landslide sensitivity area shows that the evaluation results have high accuracy and reliability. The research results can provide scientific support for the engineering of disaster reduction and prevention of government departments and provide scientific basis for the prediction and management of landslide disasters.
【作者單位】： 中國地質(zhì)調(diào)查局武漢地質(zhì)調(diào)查中心;
【基金】：中國地質(zhì)調(diào)查局“三峽庫區(qū)巴東段岸坡改造調(diào)查”項(xiàng)目(12120114079301)
【分類號】：P642.22
本文編號：2134488
[Abstract]:Taking Zigui syncline basin in the three Gorges area as the study area, based on the mapping of landslide in the field, six factors, including terrain slope, stratigraphic lithology, river, road, slope direction and slope structure, are selected to participate in the landslide sensitivity evaluation, and GIS spatial analysis technique is used. The frequency ratio model was introduced to calculate the contribution rate of the evaluation factors, and the superposition analysis was carried out. Finally, four sensitive zones were divided. The results show that the area of extremely high sensitivity area is 21.39, the area of landslide occurrence is 61.4444; the area of highly sensitive zone is 24.99, the area of landslide occurrence is 21.67; the area of middle sensitive zone is 30.66, the area of landslide occurrence is 13.19; the area of low sensitive zone is 24.99; the area of landslide occurrence is 21.67; 22.93, the area of landslide is 3.69. The cumulative percentage curve of landslide sensitivity area shows that the evaluation results have high accuracy and reliability. The research results can provide scientific support for the engineering of disaster reduction and prevention of government departments and provide scientific basis for the prediction and management of landslide disasters.
【作者單位】： 中國地質(zhì)調(diào)查局武漢地質(zhì)調(diào)查中心;
【基金】：中國地質(zhì)調(diào)查局“三峽庫區(qū)巴東段岸坡改造調(diào)查”項(xiàng)目(12120114079301)
【分類號】：P642.22
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