Rainwater chemistry observation in a karst city: variations, influence factors, sources and potential environmental effects

PeerJ

article

Jie Zeng¹  Guilin Han¹ 

[1] Institute of Earth Sciences, China University of Geosciences

关键词: Rainwater chemical;    Ionic composition;    Source identification;    Influence factors;    Karst urban area;   

DOI  :  10.7717/peerj.11167

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The rainwater chemistry and related air contaminants are used to investigate the rainwater ions sources, variations, and influence factors from 2012 to 2014 in Guiyang city (the typical karst urban area of Southwest China). According to temporal rainwater ion concentrations, the obvious variations were presented in the study period, such as Ca2+ (125∼6,652 μeq L−1) and SO42− (11∼4,127 μeq L−1). Consequently, Ca2+, Mg2+, SO42− and Cl− 100 mm) are identified. Based on the typical ionic ratios, source identification suggested that anthropogenic inputs mainly contributed to F−, NO3− and SO42−, while the dusts (crustal sources) are the primary sources of Mg2+, Ca2+ and K+. Cl− Enrichment in long-distance transport is the main contributor of Cl−. According to the observation of high level of total wet acid deposition, the more detailed spatio-temporal monitoring of rainfall-related acid deposition (particularly sulfur deposition) is required to understand its potential environmental effects in the aquatic ecosystem of the earth surface.

【 授权许可】

CC BY