Liu Hong-yan, Huang Jian-guo, Guo Yan-na
College of Natural Resource and Environment Science, Southwest Agricultural University, Chongqing 400716, China.
Huan Jing Ke Xue. 2006 Apr;27(4):655-60.
Chemical characteristics of surface runoff and groundwater in different vegetation types on Jinyunshan located in suburb of Chongqing were studied, and the relationship between runoff chemical characteristics and soil properties were analyzed. The vegetation types include coniferous broad-leaved mixed forest, evergreen broad-leaved forest, bamboo forest, shrubbery and bare soil. Results showed as follows: Chemical characteristics in surface runoff and groundwater were similar to that in rainfall, which Ca2+ was the dominant cation, Ca2+ > K+ > Na+ > Mg2+ > NH4+; and SO4(2-) was the dominant anion, SO4(2-) > NO; > Cl-. The concentration of Ca2+, Mg2+, K+, Na+, SO4(2-), Cl- in runoff were higher than that in rainfall, meanwhile Ca2+, Mg2+, SO4(2-), Cl- in groundwater were higher than that in surface runoff. pH of groundwater was obviously influenced by soil pH. Ca2+, Mg2+, K+, Na+ in groundwater showed a negative correlation to those properties in soil profile because cations were always absorbed by colloids in soils. Moreover, since anions were easy to be leaching, SO4(2-), NO3-, Cl- in groundwater displayed a positive correlation to that in soil profile.
对重庆城郊缙云山不同植被类型下的地表径流和地下水的化学特征进行了研究，并分析了径流化学特征与土壤性质之间的关系。植被类型包括针阔混交林、常绿阔叶林、竹林、灌丛和裸地。结果如下：地表径流和地下水中的化学特征与降雨中的相似，其中Ca2+为主要阳离子，Ca2+>K+>Na+>Mg2+>NH4+；SO4(2-)为主要阴离子，SO4(2-)>NO3->Cl-。径流中Ca2+、Mg2+、K+、Na+、SO4(2-)、Cl-的浓度高于降雨中的，同时地下水中Ca2+、Mg2+、SO4(2-)、Cl-的浓度高于地表径流中的。地下水的pH值受土壤pH值的显著影响。地下水中的Ca2+、Mg2+、K+、Na+与土壤剖面中的这些性质呈负相关，因为阳离子总是被土壤中的胶体吸附。此外，由于阴离子易于淋溶，地下水中的SO4(2-)、NO3-、Cl-与土壤剖面中的呈正相关。
