摘要
选取疏勒河干流3个水文站1956-2016年逐月、逐年降水数据作为基础资料,采用线性倾向、累积距平、滑动平均、Mann-Kendall突变检验等方法,分析疏勒河干流降水量年变化、年内变化、年代际变化、季节变化和突变特征。结果表明:疏勒河干流年降水量呈现不同程度增加趋势,年降水量倾向率排序表现为:昌马堡站5.47 mm·(10a)^-1>双塔堡水库站1.454 mm·(10a)^-1>潘家庄站0.866 mm·(10a)^-1;降水量年内分配极不均匀,主要集中于5-8月,占年降水量的65%以上;降水量年代际呈现20世纪60年代和90年代降水量均低于多年平均值,20世纪70年代和21世纪10年代降水量均高于多年平均值;降水量季节变化不同站点呈现不同变化特征,昌马堡站、潘家庄站和双塔堡水库站分别是夏季、秋季和秋季降水对降水量贡献最大,同时不同季节不同年代平均降水量距平呈现不同变化特征;降水量突变年在不同季节呈现不同突变特征和不同突变时间,昌马堡站、潘家庄站和双塔堡水库站年平均降水量突变点分别为1964年和2001年、1988年和1987年。
As the third largest inland river basin in the Hexi corridor,Gansu province,northwest China,the Shule River Basin poses as an important ecological security barrier.As the main zone of societal,economic,and human activity,the mainstream of the Shule River is also a vital ecological defense at the forefront of the Shule River Basin.The purpose of this study was to analyze the precipitation variation in the mainstream of the Shule River Basin and to elucidate the precipitation trends in the river basin.Monthly and annual precipitation data from Changmabao,Panjiazhuang,and Shuangtaobao Reservoir hydrological stations along the mainstream of the Shule River were used.Variations in yearly annual change,change during a year,interannual change,seasonal change,and precipitation mutation in the mainstream of the Shule River from 1956 to 2016 were analyzed using linear tendency,cumulative anomaly,moving average,and Mann-Kendall mutation tests.The results showed that the annual precipitation in the main stream of the Shule River exhibited an overall increasing trend(to varying degrees),following the order:Changmabao,5.47 mm·(10a)^-1> Shuangtaobao Reservoir 1.454 mm·(10a)^-1> Panjiazhuang 0.866 mm·(10a)^-1.The distribution of precipitation during a year was extremely uneven;however,it was mainly concentrated in May-August,accounting for more than 65% of the annual precipitation.The interannual change in precipitation in the 1960s and 1980s was lower than the average annual precipitation;whereas in the 1970s and 2010s,it was higher than the annual average.The seasonal variation in precipitation showed different characteristics at different stations.Precipitation at Changmabao,Panjiazhuang,and Shuangtabao Reservoir contributed the most toward the precipitation in summer,autumn and autumn,respectively.The average precipitation anomaly in different seasons and different years presented different characteristics.The precipitation mutation of the annual average and over the different seasons showed different mutation characteristics and different mutation times.The mutation points of the average annual precipitation in Changmabao,Panjiazhuang,and Shuangtabao Reservoir occurred in 1964 and 2001,1988,and1987,respectively.These research results are practically important in terms of promoting regional integrated water resources management and scientific allocation.In a follow-up study,the characteristics and prediction of regional precipitation trends under a changing environment will be further investigated.
作者
孙栋元
齐广平
鄢继选
安鹏存
SUN Dong-yuan;QI Guang-ping;YAN Ji-xuan;AN Peng-cun(College of Water Conservancy and Hydropower Engineering,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Gansu Research Institute for Water Conservancy,Lanzhou 730000,Gansu,China)
出处
《干旱区研究》
CSCD
北大核心
2020年第2期291-303,共13页
Arid Zone Research
基金
清华大学水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2018-A-05)
甘肃省水利科学试验研究与技术推广计划项目(甘水科外发〔2018〕70号-3和甘水科外发〔2017〕76号-10)
农业工程培育学科建设开放基金(XP201806-2)。
