水资源与水工程学报2017，Vol.28Issue(6)：20-26,7.DOI:10.11705/j.issn.1672-643X.2017.06.04
金沙江下游元谋干旱河谷区水沙过程演变规律研究
Study on the evolution rule of water and sediment processes in Yuanmou arid valley of Jinsha River, southwest China
摘要
Abstract
Based on the measured data of runoff and sediment in monthly time scale from 1970 to 2012 of Yuanmou arid valley in the lower reaches of the Jinsha River, the linear trend estimate, mean cumulative curve, Yamamot test and Morlet wavelet analysis method were employed to study the water and sediment evolution rule. The results showed that:more than 85％ of water and sediment transportation in Yuanmou arid valley are during the annual monsoon period, since the 1970s, the water and sediment transportation amount showed a slightly decreasing trend, water production accounted for the proportion of the whole ba-sin showed a decline trend while the sediment yield ratio presented an increasing trend. The runoff and sediment process has two abrupt points since 1960's, the abrupt point of runoff was in 1992 and 1994 for the sediment, while the runoff and sediment both have an obvious abrupt point in 2002. The periodic var-iation of annual runoff and sediment is the most significant in the 28 year time scales, which is the first main cycle, and there were one complete wet, sandy center year and one complete center year of less wa-ter and sand. In addition, the periodic variation in 13 years time scale is also prominent too. Compared to the runoff, the sediment yield in Yuanmou arid valley has an increasing trend since 1992 but presented a decreasing trend since 2003 .关键词
水沙过程/演变规律/金沙江下游/元谋干旱河谷Key words
water and sediment processes/evolution rule/reaches of Jinsha River/Yuanmou arid valley分类
建筑与水利引用本文复制引用
丁文荣..金沙江下游元谋干旱河谷区水沙过程演变规律研究[J].水资源与水工程学报,2017,28(6):20-26,7.基金项目
国家自然科学基金项目(41761105,41101099) （41761105,41101099）
云南省教育厅重点项目(2015Z056) （2015Z056）
