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Effects of land use on water chemistry in a river draining karst terrain, southwest China
Guilin Han;  Fushan Lib;  Qiu Tan
2014
Source PublicationHydrological Sciences Journal5
Volume59Issue:5Pages:1063-1073
Abstract

The effects of land use on river water chemistry in a typical karst watershed (Wujiang River) of southwest China have been evaluated. Dissolved major ions and Sr isotopic compositions were determined in 11 independent sub-watersheds of the Wujiang River to investigate the spatio-temporal variations in river water chemistry and their relationship to land use. The results show significant spatial variability in pH, major ions, total dissolved solids (TDS), and Sr isotopic compositions throughout the basin. Correlation analysis indicates that nitrogen content is significantly related to forest coverage. Nitrogen and potassium generally have higher values in the rainy season, and the percentage of agricultural land controlled NO3 - levels, which originate from anthropogenic sources. Forest cover, which varies between 35% and 71%, has no statistically significant impact on river solute concentrations, but the TDS flux is low in sub-watersheds with greater forest cover. Geological sources have a significant influence on pH and Sr isotopic compositions in river water throughout the basin.

KeywordLand Use River Water Water Chemistry Wujiang River Basin, China China
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/11198
Collection环境地球化学国家重点实验室
Affiliation1.School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
2.Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China
Recommended Citation
GB/T 7714
Guilin Han;Fushan Lib;Qiu Tan. Effects of land use on water chemistry in a river draining karst terrain, southwest China[J]. Hydrological Sciences Journal5,2014,59(5):1063-1073.
APA Guilin Han;Fushan Lib;Qiu Tan.(2014).Effects of land use on water chemistry in a river draining karst terrain, southwest China.Hydrological Sciences Journal5,59(5),1063-1073.
MLA Guilin Han;Fushan Lib;Qiu Tan."Effects of land use on water chemistry in a river draining karst terrain, southwest China".Hydrological Sciences Journal5 59.5(2014):1063-1073.
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