LIAO Cheng1, SHI Zeming1,3, WANG Dewei2, ZHANG Fengying1, XU Wenbin1, TANG Liang1,3
（1.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;
2.Chengdu geological survey center, China Geological Survey, Chengdu 610081, China;
3.Applied Nuclear Techniques in Geosciences Key Laboratory of Sichuan Province, Chengdu University of Technology, Chengdu 610059, China）
Abstract: The Anning River valley, with densely population and developed mining industries, is the second largest granary in Sichuan Province. It is of great significance to investigate the influence of geological background and human activities on the chemistry and substance provenance of river water. The study shows that the Anning River is weakly alkaline, with a mean pH of 8.18. The TDS value is higher than the world average. The sequence of cation concentration in water is Ca2+>Na+>Mg2+>K+, and the order of mean anion concentration is HCO3->Cl->SO42->NO3-. TDS, cation and anion ions increases from the upstream to the downstream, and concentrations of SO42- and NO3- fluctuate greatly. Chemical weathering of silicate and carbonate rocks are the primary factors that control the cheracteristics of the water. NO3- in the basin is mainly derived from agricultural activities and soil organic nitrogen. Mining activities have a great influence on the concentration of SO42- in the Anning River, and the influence of human activities on the hydrochemistry of the Anning River basin cannot be ignored.
Key words: Anning river basin; water chemistry; rock weathering; human activities
EARTH AND ENVIRONMENT Vol.48, No.6, Tot No.338, 2020, Page 680-688
