Effects of land use on water chemistry in a river draining karst terrain, southwest China

被引：15
作者：
Han, Guilin [1 ]
Li, Fushan [2 ,3 ]
Tan, Qiu [4 ]
机构：
[1] China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
[2] Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550001, Peoples R China
来源：
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES | 2014年 / 59卷 / 05期
关键词：
land use; river water; water chemistry; Wujiang River basin; China; QUALITY; COVER; IMPACT; ECOSYSTEMS; POTASSIUM; CATCHMENT; STRONTIUM; RESERVOIR; AMAZON; BASIN;
D O I：
10.1080/02626667.2014.902948
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
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.
引用
收藏
页码：1063 / 1073
页数：11
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