基于GIS与信息量模型的沟谷密度与滑坡发育关系的研究

Relationship between gully density and landslide based on GIS and information value model

本文以ArcGIS为平台,利用信息量模型,重点分析了研究区沟谷密度对滑坡发育的影响,定量地给出了二者的相关关系。通过对研究区内718个滑坡样本点的细致分析,结果表明,沿河谷两岸、山脉和平地接合的坡脚部位,地表破碎程度较高,沟谷密度值较大,对滑坡的产生最为有利。所得研究结果与实际情况较吻合,为该区滑坡灾害防治和生态环境保护等提供参考依据。

In this paper, the information value model with ArcGIS was used to analyze how gully density contributed to landslide in the study area, and the relationship between gully density and landslide was quantified. Through analyzing the data of 718 landslide examples, it was found that the contact zone between ridge and flat ground or along the valley which is high degree of fragmentation of the Earth surface and is high gully density values made a significant contribution to most landslide. The research results correspond to the actual condition very well and it can be provide guide for landslide disasters and eco-environment protection in the study area.