昆明市东川城区后山泥石流危险性评价

HAZARD ASSESSMENT OF DEBRIS FLOWS AROUND DONGCHUAN CITY OF KUNMING

云南省是中国遭受泥石流灾害最严重的省区之一,而对危险范围和危险程度进行划分和评估是泥石流减灾的重要内容。以昆明市东川城区后山泥石流为例,应用泥石流沟危险度综合评价法对泥石流危险度进行了评价;接着应用流域背景预测模型对泥石流危险范围进行预测,在这些数据和已构建的东川城区数字高程模型数据的基础上,应用GIS生成了以上泥石流危险范围预测图,研究成果为东川城区减灾防灾提供了科学依据。

Yunnan is one of the provinces seriously suffering from debris flow hazards. The hazard degree assessment and the hazard range prediction are important content of debris flow prevention. The study area was located in the around area of Dongchuan. Using the methodology of hazard degree synthetic assessment, author calculated and obtained the hazard degrees of the above three debris flow gullies. “The Drainage Area Background Model” was also used for predicting hazard range. On the basis of the above data and the DEM data of the Dongchuan area, a map of the hazard range of debris flow in the around area of Dongchuan was completed using GIS. The research results provided scientific basis for the prevention and reduction of hazard in Dongchuan .