水资源与水工程学报2018，Vol.29Issue(1)：18-24,7.DOI:10.11705/j.issn.1672-643X.2018.01.03
巴音河流域德令哈市气象站近60年来降水变化特征分析
Analysis on variation characteristics of precipitation for recent 60 years in Delingha weather station of Bayin River Basin
摘要
Abstract
Based on monthly precipitation data from Delingha weather station during the period of 1956-2013,the drought was characterized by means of standardized precipitation index (SPI),and this paper analyzed the different temporal scale variation characteristic of precipitation and drought by using the methods of linear trend,Mann-Kendall trend test and abrupt change check,sliding t-test,Morlet wavelet transformation,R/S analysis and standardized precipitation index.The results indicated as follows:Rainfall was below normal level before 1980s,and was above normal level after 1980s,showing an upward trend.The winter precipitation variation was relatively stable.Precipitation in autumn experienced a great fluctuation.Annual and seasonal precipitation showed a significantly increasing trend in recent 60 years.The increasing rate of annual precipitation was 21.16 mm/(10a),the trend of summer precipitation was the most obvious,and its increasing rate was 12.35 mm/(10a).There were not only the 3-9a short-term periodic changes of annual and seasonal precipitation,but also the 18-28a longterm periodic changes.Correlation analysis shows that SPI and Rainfall anomaly were significantly correlated and there was a downward trend in drought severity,two periodic oscillation of droughts were found,including 5a period and 18a period.There was a continuance for precipitation in Delingha weather station of Bayin River basin,in the future,it will maintain an increasing trend,and however,the drought severity will keep a downward trend.关键词
标准化降水指数/降雨量变化/Mann-Kendall检验/小波分析/巴音河流域Key words
standardized precipitation index/precipitation change/climate change/Mann-Kendall test/wavelet analysis/Bayin River Basin分类
建筑与水利引用本文复制引用
文广超,王文科,段磊,李一鸣,赵家辉,赵振..巴音河流域德令哈市气象站近60年来降水变化特征分析[J].水资源与水工程学报,2018,29(1):18-24,7.基金项目
国家自然科学基金重点项目(41230314) （41230314）
旱区地下水文与生态效应教育部重点实验室中心开放基金项目(2014G1502022) （2014G1502022）
柴达木盆地循环经济试验区重点地区(德令哈)地下水勘查项目(1212011220975) （德令哈）
柴达木盆地巴音河—塔塔河流域1∶5万水文地质调查项目(121201011000150019) （121201011000150019）
