新疆西昆仑地区泥石流灾害分析与评价

[目的]评价研究区泥石流的危险性,找出适合新疆西昆仑地区泥石流灾害研究的技术和方法。[方法]以新疆西昆仑山脉西段马尔洋地区为研究对象,在充分收集、研究前人资料和有效利用其他信息源的基础上,通过对研究区ETM+影像数据的研究,对研究区泥石流灾害点进行了判读。结合DEM数据,对该区地形地貌进行了研究。[结果]选取了合适的泥石流灾害危险性评价指标体系。一般危险区、中度危险区、高度危险区、极度危险区,面积分别为:31.69,40.70,38.31,25.83km2,所占比例分别为:23.21%,29.81%,28.06%,19.92%。[结论]研究区泥石流灾害极度危险区和高度危险区占总面积的47.98%,主要分布在研究区的中部和西北部区域,为泥石流灾害高度危险性易发区。

Analysis and Evaluation on Debris Flow Disaster in West Kunlun Area of Xinjiang Region

[Objective] To explore the technology and method of the analysis and evaluation of debris flow disaster in the west Kunlun area of Xinjiang Region. [Methods] Taking Maeryang area of Xinjiang Region as the research area, and studied the characteristics of the geological environment in the region with the collected previous data and other information sources. Through interpretation of ETM⁺ images on the study area, the debris flow sites were identified. The terrain and topographic characteristics were also analyzed with DEM data. [Results] The appropriate indicators were selected for debris flow hazard assessment, and an index system was developed for risk assessment. The general risk area, medium risk area, high-risk area and extremely dangerous area were 31.69 km², 40.70 km², 38.31 km² and 25.83 km², with an area ratio of 23.21%, 29.81%, 28.06% and 19.92%, respectively. [Conclusion] Extremely and high danger zone in the study area account for 47.98% of the total area, mainly distribute in the northwest and central regions, and which is highly dangerous geologic disaster occurrence areas.