长江科学院院报2018，Vol.35Issue(2)：33-37,5.DOI:10.11988/ckyyb.20161162
天津蓟县泥石流区域预报模型
Prediction Model of Regional Debris Flow in Jixian County, Tianjin
摘要
Abstract
In the aim of predicting debris flow in Jixian county of Tianjin,some townships in the county were taken as study area,and area grid was automatically divided,then the node-cell-channel information was generated.By analyzing the formation conditions of debris flow,7 risk factors of debris flow were selected,namely occurrence frequency of debris flow,24 h rainfall,1 h rainfall,geological lithology,average slope gradient,vegetation cover type and population density.In association with fuzzy weighting method,the weight of each risk factor was calculated and a prediction model of debris flow was established.Furthermore,the debris flow occurred in Shuang'an area of Jixian county in 2012 was simulated according to the calculated risk level of each grid.Results show that in the northern mountainous area of the county,the hazard degree of debris flow Rd varies from 0.4 to 0.8,indicating medium risk and high risk.The hazard point of Shuang'an debris flow is located at a high-risk area,and the simulated results are in accordance with the actual conditions.The model has certain reliability and can be used to forecast the debris flow in the mountainous area of northern Jixian county of Tianjin.关键词
泥石流/危险因子/权重/模糊赋权法/预报模型Key words
debris flow/risk factor/weight/fuzzy weighting method/forecast model分类
建筑与水利引用本文复制引用
李大鸣,姚志帆,刘训平,陈硕,张弘强,卜世龙,熊明明..天津蓟县泥石流区域预报模型[J].长江科学院院报,2018,35(2):33-37,5.基金项目
国家自然科学创新研究群体科学基金项目(51321065) （51321065）
天津地质灾害风险预警技术集成与应用项目(CMAGJ2015M03) （CMAGJ2015M03）
天津市科委应用基础与前沿技术研究计划项目(15JCYBJC22300) （15JCYBJC22300）
