水土保持研究2017，Vol.24Issue(3)：1-6,6.
皇甫川流域1955-2013年水沙变化趋势与周期特征
Variation Tendency and Periodic Characteristics of Streamflow and Sediment Discharge in Huangfuchuan Watershed from 1955 to 2013
摘要
Abstract
To reveal how streamflow and sediment discharge change in the new period of importance producing sediment of Huangfuchuan Watershed,the tributary of Yellow River.The Mann-Kendall test,Pettitt's test and wavelet transform were applied to detect the trends,abrupt changes and periodical variation of streamflow and sediment discharge from 1955 to 2013 in the Huangfuchuan Watershed.The results showed that significant reductions in both streamflow (Z=-5.01) and sediment discharge (Z=-4.55) were detected with a significance level of 99％,as well as the reduction of streamflow (β=-0.03) was greater than sediment discharge (β=-0.01).Especially in the 21st century,the interannual variability of streamflow and sediment discharge was more significant.The first abrupt change points of both annual streamflow and sediment discharge appeared in 1984,while the second abrupt change points of these were not in the same year,for sediment discharge in 2003 later than streamflow in 1998.The periodic variation of streamflow and sediment discharge had four scales,there were 22～32 years,13～21 years,7～12 years,3～6 years scales and 23～32 years,13 ～22 years,7～12 years,3～6 years scales.As the amounts of streamflow and sediment discharge reducing as a whole,the streamflow would be in the wet period in 2011-2020,while the sediment discharge would be in the high sediment in 2013-2018.The research results showed that the decrease in the streamflow and sediment discharge in Huangfuchuan Watershed was the result of the combination with warming and drying climate and intensive human activities.However,a series of large-scale soil and water conservation measures were the vital factors leading to significant reduction in streamflow and sediment discharge in Huangfuchuan Watershed.关键词
水沙变化/周期变化/Mann-Kendall趋势检验/Pettitt突变检验/Morlet小波变换Key words
variation in streamflow and sediment discharge/periodical variation/Mann-Kendall trend test/Pettitt abrupt change test/Morlet wavelet transform分类
天文与地球科学引用本文复制引用
魏艳红,焦菊英..皇甫川流域1955-2013年水沙变化趋势与周期特征[J].水土保持研究,2017,24(3):1-6,6.基金项目
中国科学院重点部署项目“黄土高原及周边沙地近代生态环境的演变与可持续性”子课题“不同区域典型支流水沙变化对坝库工程的响应”(KZZD-EW-04-03-04) （KZZD-EW-04-03-04）
