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四川省“5.12”地震影响区,诱发了大量滑坡、崩塌、泥石流等地质灾害,给人民生命财产造成了重大损失。震后要相当长的余震期,加之降雨大,地质灾害还有进一步恶化的趋势。运用地面调查方法很难满足要求,尤其是很难满足时效性,结合研究区地质背景特征和多源遥感数据解译结果,确定地质灾害评价的指标体系,综合运用数学方法、GIS技术,对平武、青川县进行了地质灾害分布规律分析及危险性评价,提高了数据处理的时效性。其研究成果对灾区风险评估、灾后重建,尤其是高山峡谷地震多发区的防灾减灾研究具有借鉴意义。
Sichuan Province “5.12” earthquake affected area, induced a large number of landslides, landslides, landslides and other geological disasters, to the people’s lives and property caused heavy losses. After a long aftershock earthquake period, coupled with heavy rainfall, geological disasters and further deterioration of the trend. It is difficult to meet the requirements by using surface survey method, especially it is difficult to meet the timeliness. According to the geological background characteristics of the study area and interpretation results of multi-source remote sensing data, the index system of geological hazard assessment is determined. By comprehensively using mathematical methods and GIS technology, Wu, Qingchuan County conducted a geological hazard distribution analysis and risk assessment, improve the timeliness of data processing. The research results have reference significance to risk assessment in disaster areas, post-disaster reconstruction, especially for disaster prevention and reduction in areas prone to earthquakes in alpine gorge.