Geological Environmental Quality Assessment Of The Topographic MAP Area Of Anren Town, Shaanxi Province

In recent years,with the acceleration of the construction of national economy and urbanization in China,the change of geological environment has gradually become one of the main factors restricting the economic construction and development of our country.How to coordinate the relationship between human development and geological environment has become a hot topic in today's society.Only by thoroughly understanding the geological environment,studying its influence mechanism on human economic construction activities,analyzing its allowable limit allowable value of geological environment state,and evaluating the impact of human activities on geological environment,can the relationship between human and geological environment be coordinated.Based on the project of Geological Hazard Survey of Ground Fissures in Weinan Area of Guanzhong Basin,this paper collects and collates the basic geological data of Anren Town Amplitude in Dali County and the existing research data.At the same time,it carries out the comprehensive geological survey of hydraulic environment,and comprehensively analyses the main problems affecting the geological environment in Anren Town area and their mechanism of action.In this paper,10main factors affecting the geological environment of Anren Town map are selected as evaluation indexes,including landform type,topographic change,bearing capacity of foundation soil,depth of groundwater table,groundwater pollution,active faults,ground fissures,land subsidence,collapsible loess and liquefaction of sandy soil.The index system divides the geological environment quality of Anren Town into four grades:good,good,medium and poor,and classifies each index quantitatively.Mapgis spatial analysis function is used to realize the comprehensive analysis and evaluation of 10 indicators,and to complete the geological environment quality evaluation of Anren Town.The results show that the area with good geological environment quality in Anren Town is 110.5km~2,accounting for 26%of the total area,mainly distributed in the southwest of Liangyi Town,the west of Anren Town and the Loess plateau;the area with good geological environment quality is 78.2km~2,accounting for 18.4%of the total area,mainly distributed in the north and northeast of Anren Town,near Fanjia Town,near Caibaorei Village and on the first terrace of the Yellow River.The area with medium geological environment quality is about 201km~2,accounting for 47.3%of the total area,mainly distributed in the floodplain of the Yellow River,the northeast of Anren Town,the area near Fanjia Town,the area near Caibao Lei Village,and the area near Quanxing Zhai Village;the area with poor geological environment quality is about 35.3km~2,accounting for 8.3%of the total area,mainly distributed in the over-topographic areas of the Loess Plateau and Weihe River terrace,and along the steep cliff of the Yellow River.Line,along Beilongchi-Beibei Village.By comparing the results of geological environment quality evaluation with field survey data in Anren Town,it is found that the results of zoning evaluation basically conform to the actual situation,which indicates that the evaluation index and method are reasonable and feasible,and can be replicated to the evaluation work in other areas with strong practicability.