Distribution And Preventive Improvement Regionalization Of Geological Disasters In Shenmu City

Based on the detailed investigation project of geological disasters in Shenmu County,Shaanxi Province,this paper divides and evaluates the geological disaster-prone areas and dangerous areas in Shenmu County on the basis of analyzing the types,development characteristics and distribution laws of geological disasters,and Finally,put forward countermeasures and suggestions for geological environment protection and geological disaster prevention.The main conclusions are as follows:(1)According to the on-the-spot investigation,in Shenmu County,except for Erlin Rabbit Town,Dabaodang Town and Jinjie Town,the other 12 towns and 6 offices have geological disasters,and there are 264 geological disasters.The main types of geological disasters include landslides,collapses,mand ground collapses,including 200 collapses,34 landslides,and 30 ground collapses.(2)(2)According to the prediction and evaluation,there are 214 unstable landslides,collapses and ground collapses in the existing geological disasters in Shenmu City,41 stable and stable,and 9 stable and high-risk geological disasters...There are 180 geological disaster points,34 low-risk,and 40 non-hazardous..(3)The distribution characteristics of geological disasters in Shenmu County are as follows:there are 206 geological disasters in the eastern hilly area,followed by 56 in the valley area,and the least in the western desert beach area.(4)Topography,stratigraphic lithology and rock and soil structure types and human engineering activities are the main factors determining the devel'opment of geological disasters in Shenmu County.Geological structures and water are the secondary factors responsible for the development of geological disasters.responsible for the development of geological disasters.(5)The GIS system is used to delineate the geological disaster-prone areas and dangerous zones in Shenmu County.Among them,High-prone district mainly includes the area along the Yellow River in the south of the territory,the area around the Middle Cave and the Daliuta in the north;the high-risk areas of geological disasters are mainly distributed along the 204 provincial highway,the northeast and south of the Yellow River,the northern part of the Kuye River,and the Tuwei River.Along the line and areas where population is densely populated and human engineering activities are strong.The prone areas and high-risk areas are the key areas for the prevention and control of geological disasters.(6)The prevention and control of geological disasters in Shenmu County can be divided into four key prevention and control areas and three general prevention and control areas.The key prevention and control areas are located in the area along the Yellow River and the Kuye River in the south,along the Tuwei River,in the Sunjiatun-Shenmu area,and in the northern part of the Daliuta.