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藏东南地区日降雨极值的波动变化
Alternative TitleFluctuation of daily rainfall extreme in Southeastern Tibet
邓明枫1,2; 陈宁生1; 王涛1; 丁海涛1
Corresponding Author陈宁生
2017
Source Publication自然灾害学报
ISSN1004-4574
Volume26Issue:2Pages:152-159
Abstract西藏东南部地区是我国地形差异最为显著的地区,北进的印度季风在该地区产生了巨大的降雨梯度。以藏东南地区林芝、波密、嘉黎和察隅4个气象观测站从1961年至2014年的日降雨数据为基础,分析了年降水与年最大日降雨的波动情况及其变化趋势,以及年最大日降雨的规模与频率特征。研究发现,年降水从大到小依次为波密、察隅、嘉黎和林芝,过去45 a间的年降水整体呈先增加后减少的趋势;而年最大日降雨依次为波密、察隅、林芝和嘉黎,波动性以波密和察隅最为显著,而嘉黎和林芝较弱,其变化有增有减;研究发现,采用皮尔逊Ⅲ型可以较好地模拟区域日降雨量的规模频率变化,并基于样本统计给出了均值、变差系数和变异系数。
Other Abstract

摘要:西藏东南部地区是我国地形差异最为显著的地区,北进的印度季风在该地区产生了巨大的降雨梯度。以藏东南地区林芝、波密、嘉黎和察隅4个气象观测站从1961年至2014年的日降雨数据为基础,分析了年降水与年最大日降雨的波动情况及其变化趋势,以及年最大日降雨的规模与频率特征。研究发现,年降水从大到小依次为波密、察隅、嘉黎和林芝,过去45 a间的年降水整体呈先增加后减少的趋势;而年最大日降雨依次为波密、察隅、林芝和嘉黎,波动性以波密和察隅最为显著,而嘉黎和林芝较弱,其变化有增有减;研究发现,采用皮尔逊Ⅲ型可以较好地模拟区域日降雨量的规模频率变化,并基于样本统计给出了均值、变差系数和变异系数。

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It is of the largest landform gradient in the southeast Tibet,where the north going Indian monsoon produces large precipitation gradient. In this paper, the data of daily rainfall in 1961-2014 from the four meteorological stations,including Nyingchi,Bomi,Lhari and Zayu,were applied to analyze the fluctuation and trend of annual precipitation and daily rainfall extreme, and the magnitude and frequency characters of daily rainfall extreme. Research shows that Bomi has the largest annual precipitation, followed by Zayu, Lhari and Nyingchi. The annual precipitation presents a slight increasing trend first and declining trend later in the past 45 years. For daily rainfall extreme, Bomi has the largest daily rainfall,followed by Zayu, Nyingchi and Lhari, of which,Bomi and Zayu posses strong fluctuation, whereas Lhari and Nyingchi fluctuates weakly. Daily rainfall extreme is either increased or declined. Research shows Pearson Ⅲ Curve can be applied to simulate the magnitude-frequency change of regional daily rainfall, and the mean daily rainfall, variate difference coefficient and variation coefficient are given by samples statistics.

Keyword藏东南 年降水 日降雨极值 波动 规模 频率
Subject Areap426.61+64 ; X43
DOI10.13577/j.jnd.2017.0218
Indexed ByCSCD ; 北大中文核心
Language中文
CSCD IDCSCD:5997663
Funding Organization中国科学院STS项目(KFJ-EW-STS-094) ; 国家自然科学基金项目(41402283、41371038) ; 中国科学院山地灾害与地表过程重点实验室自主基金
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19023
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院山地灾害与地表过程重点实验室/中国科学院成都山地灾害与环境研究所
2.中国科学院大学
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
邓明枫,陈宁生,王涛,等. 藏东南地区日降雨极值的波动变化[J]. 自然灾害学报,2017,26(2):152-159.
APA 邓明枫,陈宁生,王涛,&丁海涛.(2017).藏东南地区日降雨极值的波动变化.自然灾害学报,26(2),152-159.
MLA 邓明枫,et al."藏东南地区日降雨极值的波动变化".自然灾害学报 26.2(2017):152-159.
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