安徽泾县地质灾害风险调查与评价(1∶50000)遥感解译应用效果探讨

A discussion on remote-sensing image interpretation applied in the investigation and evaluation(1:50000)of geo-hazard risks in Jingxian County,Anhui

本次利用卫星遥感和地理信息技术手段,结合地质、环境、遥感等信息,在工作区的地质、地貌、环境地质条件、已知地质灾害点特征基础上,建立了遥感解译标志,对本区地质环境背景条件(孕灾背景)和地质灾害进行了解译。本文重点介绍和探讨地质灾害解译工作流程和解译效果。本次对泾县范围内解译了120个点,经野外现场验证,其中42个为滑坡灾害点,12个为道路切坡点,4个为建房切坡点。实际地质灾害点42个,正确率35%。

In this study,remote-sensing interpretation signs were established to interpret the geo-environment background conditions(hazard-inducing background)and geo-hazards in the area by using satellite remote-sensing and geographic information technology,combined with the geological,environmental,remote-sensing and other information,as well as the geological,topographic,environmental geological conditions,including the features of the known geo-hazard spots in the working area.This paper focuses on introduction and discussion of the workflow and the effect of geo-hazard interpretation,which covers120 spots in Jingxian County.After field investigation,42 of them are landslides,12 road slope cuttings,and 4 house-building slope cuttings.So,42 of 120 spots are actually geo-hazards,with the accuracy rate of interpretation being 35%.