天山阿拉沟泥石流沟危险度的划分研究  

THE CLASSIFICATION OF DANGEROUS DEGREES OF DEBRIS FLOW OF ALA CREEK,TIANSHAN MOUNTAINS

作　　者：杨发相[1] 穆桂金[1] 陈亚宁[1] 乔木[1] 李卫红[1] 韩丹[1] 

机构地区：[1]中国科学院新疆地理研究所

出　　处：《干旱区地理》1991年第S1期90-99,共10页Arid Land Geography

摘　　要：随着阿拉沟区域开发与经济建设的发展.暴雨型泥石流灾害愈加严重.特别是1988年6月24日发生的泥石流灾害损失达600万元.本文据该区泥石流的基本特点。提出泥石流危险度划分的主要因素,将泥石流沟划分为最危险、危险、中度危险、轻度危险和无危险等5类.并进行危险性综合评价,探讨干旱区泥石流危险度的划分.The debris flow of Ala creek belong to hearyraining, which occur is summer seasons,the flows is low offrequence, all of a sudden, serious of the disasters. The 12 main factors are suggestedd based on the overall analyse of debris flow form-ing factors. 1 The hard rain, the haracteristic of gully-bed, slope, material wealth, the heightof landform and catchment area etc., which are bear relationship with forming scale of debrisflow; 2 The harmful degrees of debris flow, and this is including harmful types and harmfulcomdition and latent harmful-degrees; 3 The developing trend of debris flow, which con-sists of the amount of material wealth and hand rain location and developing trend of dis-aster. According to the dividing principle of harmful degrees and forming dimensions andsame formation of debris flow, and the main facters of dividing dangerous degrees, the 5kinds were divided by synthesize analysing method that comparison of determine the na-ture and fixed quantity of debris flow gully.l Most danger, 2 Dangerous, 3 Middingdanger, 4 Trifling danger, 5 No dangerous. The synthesize appraisal of dangerous degrees of debris flow gully, and to point outthere are 3 most danger's debris flow gully that will be at present preventing and curingstress in Ala creek, the others will be progressively planing administer on the basis of thedangerous degrees and need of developing building. The rational utilizing land and buildingmust avoid dangerous area of debris flow are emphasized, which are important way of pre-venting calamity in arid land.

关 键 词：泥石流危险度划分 主要因素分析 危险性评价 天山阿拉沟 

分 类 号：P9[天文地球—自然地理学]