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首页> 外文期刊>Journal of Geoscience and Environment Protection >GIS Based Landslide Susceptibility Mapping with Application of Analytical Hierarchy Process in District Ghizer, Gilgit Baltistan Pakistan
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GIS Based Landslide Susceptibility Mapping with Application of Analytical Hierarchy Process in District Ghizer, Gilgit Baltistan Pakistan

机译：巴基斯坦吉尔吉特地区Ghizer基于GIS的滑坡敏感性图及层次分析法

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摘要

District Ghizer is a rugged mountainous territory which experiences several landslides each year. There are 16 major landslide areas and 53 villages that are at high risk to hazards. Keeping in view the severity of natural hazards, the present study was designed to generate landslide susceptibility map based on twelve causative factors viz., slope, aspect, elevation, drainage network, Stream Power Index (SPI), Topographic Wetness Index (TWI), lithological units, fault lines, rainfall, road network, land cover and soil texture. Soil texture was determined by particle size analysis and data for other factors were acquired from freely available sources. Analytical Hierarchy Process (AHP) was employed to identify major landslide causative factors in the district Ghizer. Further, a temporal assessment from 1999 till 2015 was generated to assess the impact of land cover change on landslides. It indicated that the barren soil/ exposed rocks and glaciers have reduced while the vegetation and water classes have shown increment. The total area that lies in moderate to very high landslide susceptible zones was 74.38%, while slope is the main landslide causative factor in the district Ghizer. Validation of the susceptibility map showed 88.1% of the landslides in the study area had occurred in the moderate to very high susceptible zones.
机译：Ghizer区是一个崎mountain的山区，每年都会发生数次滑坡。有16个主要的滑坡区和53个村庄处于高危险区。考虑到自然灾害的严重性，本研究的目的是根据坡度，坡向，高程，排水管网，溪流功率指数（SPI），地形湿润指数（TWI），岩性单位，断层线，降雨，路网，土地覆盖和土壤质地。通过粒度分析确定土壤质地，并从免费来源获得其他因素的数据。使用层次分析法（AHP）来识别Ghizer地区的主要滑坡成因。此外，从1999年到2015年进行了时间评估，以评估土地覆被变化对滑坡的影响。这表明，贫瘠的土壤/裸露的岩石和冰川减少了，而植被和水位却增加了。位于中度到非常高的滑坡易感区的总面积为74.38％，而坡度是Ghizer地区的主要滑坡成因。磁化率图的验证显示，研究区域中88.1％的滑坡发生在中度至非常高的敏感地区。

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