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Characteristic Rainfall for Warning of Debris Flows

ISSN号：1672-6316
期刊名称：山地科学学报(英文版)
时间：0
页码：52-56
语言：中文
分类：P332.1[天文地球—水文科学;水利工程—水文学及水资源;天文地球—地球物理学] P642.23[天文地球—工程地质学;天文地球—地质矿产勘探;天文地球—地质学]
作者机构：[1]Key Laboratory of Mountain Hazards and Earth Surface Processes, Chinese Academy of Sciences, Chengdu, 610041, China, [2]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Conservancy, Chengdu, 610041, China, [3]Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100080, China
相关基金：This work has been funded by the National Program on Key Basic Research Project （973 Program）（Grant No. 2008CB425802）, the Knowledge Innovation Program of Chinese Academy of Sciences （Grant No. KZCX2-YW-302）, and the National Natural Science Foundation of China （Grant No. 40701014）. The authors thank the Dongchuan Debris Flow Observation andResearch Station, CAS, for providing the rainfall data.
相关项目：泥石流阵性波状运动的动力学研究

作者：胡凯衡|

关键词：降雨量, 泥石流, 预警, 流动特性, 中国西南部, 雨量数据, 雨量分布, 物理特性, Debris flow, Wenchuan earthquake, warning rainfall threshold, statistics of daily rainfalldistribution

中文摘要：

典型降雨被介绍克服在为触发碎片流动决定批评降雨价值遇到的困难。典型价值被定义为碎片流动出现概率在显示出快速的增加的降雨，并且能为碎片流动被用作警告降雨阀值。在 Jiangjia 盆的记录碎片流动和 24 小时的降雨数据的调查，在西南的中国，云南省表明如此的典型降雨的存在。典型降雨由分析盆日报降雨直方图对应于 90% 累积概率的每日的降雨，这被发现。结果为从每日的降雨分发估计碎片流动警告降雨阀值提供一个简单、有用的方法。为 Subaohe 盆估计碎片流动警告降雨阀值被使用，在有 Jiangjia 盆的类似于那些的许多物理特征的 2008 Wenchuan 地震地区的一个分水岭。

英文摘要：

A characteristic rainfall is introduced to overcome the difficulties encountered in determining a critical rainfall value for triggering debris flow. The characteristic value is defined as the rainfall at which debris-flow occurrence probability shows a rapid increase, and can be used as a warning rainfall threshold for debris flows. Investigation of recorded debris flows and 24-hour rainfall data at Jiangjia basin, Yunnan Province, in southwestern China, demonstrates the existence of such a characteristic rainfall. It was found that the characteristic rainfall corresponds to the daily rainfall of 90% cumulative probability by analyzing the basin＇s daily rainfall histogram. The result provides a simple and useful method for estimating a debris-flow warning rainfall threshold from the daily rainfall distribution. It was applied to estimate the debris-flow warning rainfall threshold for the Subaohe basin, a watershed in the 2008 Wenchuan earthquake zone with many physical characteristics similar to those of the Jiangjia basin.

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