| 近60年长江中游宜昌站水沙变化与驱动因素分析 |
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| 引用本文： | 郭文献,李越,张陵,赵荣生,王鸿翔.近60年长江中游宜昌站水沙变化与驱动因素分析[J].水文,2019,39(6):69-73. |
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| 作者姓名： | 郭文献 李越 张陵 赵荣生 王鸿翔 |
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| 作者单位： | 华北水利水电大学 |
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| 基金项目： | 国家自然科学基金项目(51679090,51609085,51779094)； |
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| 摘 要： | 根据长江中游宜昌站1952～2015年长时间序列径流泥沙资料,运用Mann-Kendall趋势检验法、小波分析法和均值差异T检验等方法,揭示宜昌站径流泥沙的演变规律及其驱动因素。结果表明:(1)径流量无显著下降趋势,而输沙量下降趋势明显;(2)径流量在2005年发生突变,输沙量在2002年发生突变;(3)通过小波分析发现年径流量和年输沙量存在以20～24a为主周期的变化规律;(4)年径流量可分为1952～1955,1961～1968,1979～2001年3个多水期和1956～1960,1969～1978,2002～2015年3个少水期,输沙量可分为1952～1993,1998～2002年2个多沙期和1994～1997,2003～2015年2个少沙期;(5)年输沙量显著减少主要为水库拦沙、河道采砂和水土保持工程等人类活动所致。
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| 关 键 词： | 径流量 输沙量 演变规律 影响因素 宜昌站 |
| 收稿时间： | 2018/7/31 0:00:00 |
Analysis of Annual Runoff and Sediment Variation and Driving Factors at YichangStation in Yangtze River over 60 Years |
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| GUO Wenxian,LI Yue,ZHANG Ling,ZHAO Rongsheng,WANG Hongxiang.Analysis of Annual Runoff and Sediment Variation and Driving Factors at YichangStation in Yangtze River over 60 Years[J].Hydrology,2019,39(6):69-73. |
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| Authors: | GUO Wenxian LI Yue ZHANG Ling ZHAO Rongsheng WANG Hongxiang |
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| Institution: | North China University of Water Resources and Electric Power, Zhengzhou 450045, China |
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| Abstract: | According to the long-time series data of annual runoff and sediment at the Yichang Station in the Yangtze River during1952-2015, this paper revealed the evolution characteristics and driving factors based on Mann-Kendall, wavelet analysis and aver -age difference T methods. The results indicate that: (1) The annual runoff shows a slightly decreasing trend while the annual sedimentshows an obviously decreasing trend. (2) The runoff occurred mutation in 2005 while the sediment in 2002. (3) Wavelet analysisdemonstrates that the change characteristics of annual runoff and sediment show a main period from 20 to 24 years. (4) Theannual runoff series can be divided into three high-flow periods (1952-1955, 1961-1968, 1979-2001) and three low-flow period(1956-1960, 1969-1978, 2002-2015) respectively. In addition, the annual sediment series can be divided into two high-sedimentperiods (1952-1993, 1998-2002) and two low-sediment periods (1994-1997, 2003-2015) respectively. (5) The significant reductionof the annual sediment are mainly resulted from sediment-trapping of reservoirs , sand mining on river channels, soil and waterconservation projects. |
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| Keywords: | runoff sediment discharge evolution law influence factor Yichang Station |
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