Major element chemistry of the Changjiang (Yangtze River)

doi:10.1016/S0009-2541(02)00032-3

CORC > 北京大学 > 地球与空间科学学院

	Major element chemistry of the Changjiang (Yangtze River)
	Chen, JS ; Wang, FY ; Xia, XH ; Zhang, LT
刊名	化工地质
	2002
关键词	Changjiang Yangtze River geochemistry major ion chemistry weathering acid deposition FLUVIAL GEOCHEMISTRY WEATHERING PROCESSES WATER CHEMISTRY EASTERN SIBERIA DISSOLVED-LOAD ION CHEMISTRY LENA RIVER AMAZON CHINA TRIBUTARIES
DOI	10.1016/S0009-2541(02)00032-3
英文摘要	The chemistry of major elements (Ca, Mg, Na, K, HCO3, SO4, Cl, and Si) in the river water of the Changjiang (Yangtze River) was studied, based on continuously monitored data at 191 stations in the drainage basin for the period 1958-1990. The results show that the total dissolved solid (TDS) concentration of the Changjiang varies over an order of magnitude throughout the basin (49.7-518.1 mg/l), with a medium TDS concentration of 205.9 mg/l, about three times the global average. In contrast, the TDS at a given main-channel station varies only slightly in different seasons with a variation factor less than 2.0, despite a substantial water dilution in the summer flood season. The major element chemistry of the Changjiang is mainly controlled by rock weathering, with the anion HCO3 and the cation Ca dominating the major ion composition, due to the abundance of carbonate rocks in the basin. A persistently increasing trend has been observed in the concentrations Of SO4 and, to a lesser extent, Cl in the Changjiang, a signature of considerable anthropogenic impacts (e.g., acid deposition). Flux calculations at Datong (the most downstream main-channel station without tidal influence) indicate that the Changjiang transports ca. 154 x 10(6) tons/year of TDS to the sea, second only to the Amazon in the world. (C) 2002 Elsevier Science B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000177462500004&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geochemistry & Geophysics; SCI(E); 132; ARTICLE; 3-4; 231-255; 187
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/208746]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Chen, JS,Wang, FY,Xia, XH,et al. Major element chemistry of the Changjiang (Yangtze River)[J]. 化工地质,2002.
APA	Chen, JS,Wang, FY,Xia, XH,&Zhang, LT.(2002).Major element chemistry of the Changjiang (Yangtze River).化工地质.
MLA	Chen, JS,et al."Major element chemistry of the Changjiang (Yangtze River)".化工地质 (2002).