GEOCHEMICAL JOURNAL
Online ISSN : 1880-5973
Print ISSN : 0016-7002
ISSN-L : 0016-7002
Contribution of atmospheric pollutants into groundwater in the northern Sichuan Basin, China
XIAO-DONG LIHARUE MASUDAMASAKO ONOMINORU KUSAKABEFUMITAKA YANAGISAWAHAI-AO ZENG
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2006 Volume 40 Issue 1 Pages 103-119

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Abstract

Anthropogenic pollution of groundwater was investigated from the source area to the uppermost densely populated city, Dujiangyan, along the Minjiang River, a tributary of the Yangtze River, in the Sichuan Basin, in China, based on the chemistry of major dissolved ions and stable isotopic ratios (H, O and S). In the source area above 2,900 m, groundwaters were rarely polluted by human activities. Groundwater pollution was found to be limited to populated areas, where the pollutants come mainly from household wastes. The groundwaters in Dujiangyan and the surrounding area were mixtures of waters from the upper streams along the Minjiang River and local precipitation. The groundwater of this area was found to contain high amounts of anthropogenic Cl-, NO3--N, and SO42-. Among these anions, most SO42- was derived from air pollutants. The present study demonstrates that air pollution seriously affects the quality of groundwaters in areas where the Minjiang River emerges from the bottom edge of the Sichuan Basin.

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© 2006 by The Geochemical Society of Japan
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