遥感解译的泥石流固体径流物质定量分析

Quantitative analysis of debris flow solid runoff by remote sensing interpretation

针对传统的泥石流评价方法仅考虑已堆积的泥沙量,而泥石流通常与崩塌、滑坡等地质灾害同时发生的问题,该文以楞古水电站库区为研究区域,采用遥感、工程地质分析原理和灾害评价分析相结合的手段研究库区主要工程地质问题,解译出不良地质现象70处。结果表明:在提高水库工程地质测绘、分析及研究工作的效率、工作质量上有很大的理论和实践意义。基于遥感解译结果,现场调查、地形地质等资料,最终计算力邱河坝段在降水量达到最大250mm时,力邱河产生的可能泥石流泥沙量约为15 850 115m^3。依据降雨量概率分布估算,力邱河流域由于不良地质条件所产生的泥石流物源(推移质)年均约6.58×10^5 m^3。

Aiming at the problem of traditional landslide evaluation methods only considered the accumulation of sediment,but debris flow,collapse,landslides and other geological disasters often occured at the same time.The article took reservoir area of Lenggu Hydropower Station as the study area,70 adverse Geological phenomena were interpreted.The results showed that it was of great theoretical and practical significance to improve the efficiency and work quality of reservoir engineering Geological mapping,analysis and research.Based on remote sensing interpretation results,field investigation,topography and geological information,finally calculating the possible debris flow solid runoff quality was approximately 15 850 115 m^3 when the precipitation reached a maximum of 250 mm.According to the probability distribution of rainfall,the debris flow solid in the Liqiuhe dam section was estimated to be about 6.58×10^5 m^3 per year.