陕西陇县地质灾害危险性分区评价

    Assessments of geohazard danger zoning in Longxian County, Shaanxi

    • 摘要: 在陇县地质灾害详细调查的基础上,通过统计分析确定了各类主要影响因素,采用信息量法和定性评价方法分别进行了地质灾害的危险性评价。建立了地质灾害评价指标体系,确定了地质灾害危险性判别标准,进行了地质灾害危险区划。共划分为高危险区、中危险区、低危险区和极低危险区4个等级,在此基础上,又划分了12个亚区。其中高危险区面积为619.19km2,占总面积的25.79%,中危险区面积为509.74km2,占总面积的21.23%,低危险区面积为711.75km2,占总面积的29.65%,极低危险区面积为559.87km2,占全区面积的23.32%。

       

      Abstract: Based on investigation of geohazards in Longxian County and various main influence factors determined by statistical analysis, danger assessments of geohazards were carried out using the integrated information method and qualitative assessment method. The authors set up the indicator system of geohazard assessments, determined the discrimination criteria of geohazards, and performed geohazard danger regionalization. China is divided into the high danger region, moderate danger region, low danger region and very low danger region. On that basis, 12 subregions were distinguished. Of these region, the high danger regions cover an area of 619.19 km2, accounting for 25.79% of the total area; the moderate danger regions have an area of 509.74 km2, making up 21.23% of the total area; the low danger regions have an area of 711.75 km2, taking up 29.65% of the total area; and the very low danger regions occupy an area of 559.87 km2, accounting for 23.32% of the total area of the whole county.

       

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