水力发电学报2011，Vol.30Issue(2)：78-83,6.
近50多年来长江中游宜昌站泥沙情势变化研究
Sediment regimes variation of Yichang hydrological station in the middle Yangtze River over the last five decades
摘要
Abstract
On the daily mean sediment concentration data of 1950 ～2006 at Yichang hydrological station in the middle Yangtze, the variation tendency at the station over this period were analyzed by the method of Mann-Kendall. Analysis on the series of monthly mean by Morlet wavelet transformation revealed a complex structure of multiple time scales and periodic oscillations in different time scales. A comparison of the two cases of pre and post impoundment of Gezhouba shows influence of this reservoir. Over the last five decades the concentration has an obvious fall tendency decreasing by 7. 0 × 10 -3kg/m3 yearly on an average, and it shows three variation periods of roughly 14, 19 and 22 years. Gezhouba impounding causes a decrease in multi-year average by 0. 147 kg/m3, or falls to 20％ of its previous value. The results presented are significant to the study of impacts of human activities.关键词
河流泥沙工程学/长江/宜昌水文站/含沙量Key words
river sedimentation engineering/ Yangtze River/ Yichang hydrological station/ sediment concentration分类
资源环境引用本文复制引用
郭文献,王鸿翔,徐建新,谷红梅..近50多年来长江中游宜昌站泥沙情势变化研究[J].水力发电学报,2011,30(2):78-83,6.基金项目
国家十一五水专项资助项目(2008ZX07209-002-04) （2008ZX07209-002-04）
华北水利水电学院高层次人才引进资助项目(200907) （200907）
