青藏高原东南缘复杂地形条件下降水特征分析

发布时间：2018-07-02 11:16

  本文选题：山地灾害 + 垂直气候特征　； 参考：《人民长江》2017年10期

【摘要】：针对青藏高原东南缘泥石流灾害活动频繁,但形成区缺乏较为准确的降水资料的现实需求,按照水系的分水岭将研究区分为6个区域,并利用区内60个气象观测站点1981~2010年年均降水量、海拔高度、坡向、坡度资料,结合GIS和统计分析,建立了各分区的降水垂直分布关系式,并以金沙江流域的拉哇沟、大渡河流域的江咀沟对该统计模型进行了初步验证。结果显示:针对不同的流域,该降水垂直分布关系式能够获取缺气象观测站点的山区降水数据,大体上适用于青藏高原东南缘降水测算,能为泥石流等山地灾害形成区的汇流计算提供参考。
[Abstract]:In view of the frequent debris flow activities in the southeast margin of the Qinghai-Xizang Plateau, but the actual demand for more accurate precipitation data in the forming area, the study is divided into 6 regions according to the watershed of the water system. Based on the data of average annual precipitation, altitude, direction and slope of 60 meteorological observation stations from 1981 to 2010, combining GIS and statistical analysis, the vertical distribution formula of precipitation in each region is established, and the Lawagou valley of Jinsha River basin is used to analyze the vertical distribution of precipitation. The statistical model is preliminarily verified by the river mouth gully in the Dadu River Basin. The results show that, for different basins, the vertical distribution of precipitation can obtain precipitation data of mountainous areas lacking meteorological observation stations, which is generally suitable for precipitation calculation in the southeastern margin of the Qinghai-Xizang Plateau. It can provide a reference for the flow confluence calculation in the mountain disaster forming area such as debris flow.
【作者单位】： 成都信息工程大学大气科学学院;中国科学院山地灾害与地表过程重点实验室;中国科学院水利部成都山地灾害与环境研究所;西南石油大学土木工程与建筑学院;
【基金】：中国科学院科技服务网络计划(STS计划)项目(KFJ-EW-STS-094);中国科学院西部之光重点项目(Y5R2040040) 四川省科技计划项目(2015SZ0214)
【分类号】：P426.6;P642.23
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本文编号：2089938