Impact of Three Gorges Reservoir on Sedimentation of Daning River: Changes in Carbonate and Major Element Contents

详细信息   

• 责任者：Wu Xudong (Department of Geography Science ; Southwest University ; Chongqing 400715 ; China) ; Li Hongchun
• 刊名：Geological Review
• 出版年：2008
• 卷期：54(3)
• 关键词：现代沉积 ; recent deposits ; 碳酸盐沉积物 ; carbonate sediments ; 长江三峡 ; Yangtze River Valley
• 页码：p.419-426
• 图表：6 illus., 1 table，22 refs.
• 分类号：1400
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

摘要

Acid-leachable major elements (K, Na, Ca, Mg)of three riverine sediment cores have been measured. These cores were collected in Oct. 2006 from Daning River which is a major tributary of Yangtze River. The results suggest that the content of acid-leachable major elements in the cores can reflect the characteristics and origin of the sediments. It indicates a differently sedimentary origin from Daning River. As a result, the carbonate content and acid-leachable major elements in the riverine sediments decreased sharply and the color of the sediment changed obviously. Since the first phase of the sluice of Three Gorges Reservoir in December 2004, the sediment thickness around Shuanglong town is about 11 cm, which gives a sedimentary rate of 5.5 cm/a in Daning River.