金陵景区牛皋沟泥石流灾害特征  

Formation Conditions and Source Characteristics of Niugao Ditch Debris Flow in Jinling Scenic Spot

作　　者：郭英[1] 刘晓晓[1] 申健[1] 

机构地区：[1]北京市地质研究所,北京100120

出　　处：《城市地质》2017年第3期50-54,共5页Urban Geology

摘　　要：牛皋沟位于北京市周口店镇金陵景区,2012年"7·21"特大暴雨期间暴发泥石流。本文在现场调查、综合地质测绘、勘探等的基础上,对景区泥石流的形成条件、物源分布及特征进行了探讨分析。研究表明,牛皋沟岸坡陡峻、物源丰富、水动力足,具备泥石流形成的基本条件,且景区内频繁的人类工程活动也为泥石流发育创造了条件;对牛皋沟泥石流的基本特征值进行计算,泥石流流体重度约为1.550 t/m^3,定性为稀性泥石流;50年一遇洪峰流量值为28.33m^3/s,一次泥石流固体冲出物1.85×10~4 m^3,其爆发的规模属于中型泥石流。Niugao ditch is located in Jinling Scenic Spot in Zhoukoudian, where the debris flow took place suddenly on July 21, 2012 for rainstorm. On the basis of site investigation and exploration, the authors analyze the formation conditions and source distribution characteristics of the debris fow in Jinling Scenic Spot. The result show that Niugao Ditch with steep hill, has basic conditions of the mudslide such as more rich loose deposits, and plenty of water power, meanwhile, frequent human engineering activities in the scenic spot is favorable for the formation of debris fow. In this paper, we calculate the basic characteristics of the debris fow： its density is 1.550t/m3, belonging to diluent debris fow; the peak fow is 28.33m3/s under the condition of once-50-year rainstorm, and the debris fow solid volume is 1.85×104m3, belonging to medium-scale debris fow as for bursting scale.

关 键 词：泥石流 灾害 基本特征 牛皋沟 

分 类 号：P642.23[天文地球—工程地质学]