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地基GPS反演泥石流流域局地降水水汽特征——以云南东川蒋家沟为例
Alternative TitlePrecipitable Water Vapor in the Debris-Flow Watershed Inversed by Ground-based GPS ——A Case Study of the Jiangjia Valley in Yunnan Province
王源程1,2,3; 苏鹏程2,3; 陈聪4; 倪长健1
Corresponding Author苏鹏程
2016
Source Publication山地学报
ISSN1008-2786
Volume34Issue:6Pages:749-756
Abstract在暴雨型泥石流预警预报中,如何准确获取有效的降水信息是关键问题。基于蒋家沟流域内布设的地基GPS观测站和流域内3个雨量站点,对比分析大气可降水量(PWV)和站点实际降水,发现PWV变化趋势与降水的发生有较好的对应关系,降水一般发生在PWV的峰值处或滞后于峰值发生;根据PWV过程中的极小值将长序列PWV过程划分为数组短序列PWV过程,引入前期PWV和有效PWV,通过有降水的前期累积PWV和有效累积PWV的散点函数拟合确定降水发生时的PWV临界线,PWV临界线将为泥石流流域的降水预警提供依据,同时可证明地基GPS反演PWV对泥石流流域尺度下的降水预警具有重要价值,其反演得到的PWV不仅是降水预报中的重要因子,PWV临界线的确定亦为降水的准确性和时效性提供参考。
Other Abstract

在暴雨型泥石流预警预报中,如何准确获取有效的降水信息是关键问题。基于蒋家沟流域内布设的地基GPS观测站和流域内3个雨量站点,对比分析大气可降水量(PWV)和站点实际降水,发现PWV变化趋势与降水的发生有较好的对应关系,降水一般发生在PWV的峰值处或滞后于峰值发生;根据PWV过程中的极小值将长序列PWV过程划分为数组短序列PWV过程,引入前期PWV和有效PWV,通过有降水的前期累积PWV和有效累积PWV的散点函数拟合确定降水发生时的PWV临界线,PWV临界线将为泥石流流域的降水预警提供依据,同时可证明地基GPS反演PWV对泥石流流域尺度下的降水预警具有重要价值,其反演得到的PWV不仅是降水预报中的重要因子,PWV临界线的确定亦为降水的准确性和时效性提供参考。

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Accurate and effective precipitation information is crucial for forecast of rainstorm debris-flow. The value of the water vapor,which has indicative significance for the occurrence and continual of the precipitation,has become the key factor of rainfall prediction. This study was aimed to interpret the process of Precipitable Water Vapor (PWV) being translated into the observed precipitation and analyze the characteristic of PWV when the precipitation trigger debris-flow. Based on the data from ground-based GPS station and three rainfall stations in the Jiangjia valley,a relationship between the trend of PWV and the occurrence of precipitation was found. Precipitation always occurred in or after the peak of PWV curve. The long PWV curve was divided into several short PWV curves by the minimum value of PWV.Then the preliminary PWV and effective PWV were defined.The critical PWV line was determined by fitting function of the preliminary PWV and effective PWV,which made a contribution to precipitation forecast.It was proved that the PWV inversed by ground-based GPS is of great significance to forecast of precipitation in the debris-flow watershed.

Keyword地基gps 泥石流流域 大气可降水量(Pwv) 降水预警
Subject AreaP642.23 ; P412 ; P426.616
DOI10.16089/j.cnki.1008-2786.000182
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5923638
Funding Organization中国科学院山地灾害与地表过程重点实验室开放基金 ; 中国科学院西部之光博士项目(Y4R2090090)
Citation statistics
Cited Times:1[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18574
Collection山地灾害与地表过程重点实验室
Affiliation1.成都信息工程学院大气科学学院
2.中国科学院山地灾害与地表过程重点实验室
3.中国科学院水利部成都山地灾害与环境研究所
4.四川省地震局
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
王源程,苏鹏程,陈聪,等. 地基GPS反演泥石流流域局地降水水汽特征——以云南东川蒋家沟为例[J]. 山地学报,2016,34(6):749-756.
APA 王源程,苏鹏程,陈聪,&倪长健.(2016).地基GPS反演泥石流流域局地降水水汽特征——以云南东川蒋家沟为例.山地学报,34(6),749-756.
MLA 王源程,et al."地基GPS反演泥石流流域局地降水水汽特征——以云南东川蒋家沟为例".山地学报 34.6(2016):749-756.
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