松嫩平原西部盐沼湿地水环境化学特征

松嫩平原西部盐沼湿地水环境碱化程度高,水中的pH值普遍高于8.0,多数为苏打钠型水。在对本区盐沼基本水环境化学特征阐述的基础上,通过对水化学的基本变量CO₃^2-、HCO₃^2-、Cl^-、Ca²⁺、Mg²⁺、SO₄^2-、Na⁺和派生变量(Cl^-+SO₄^2-)/HCO₃^2-及Na⁺/(Ca²⁺ Mg²⁺)等的相关分析,得出各水化学变量之间的相关关系,并以pH值为分类基础得到了判别函数和判别区域图,对区域盐沼湿地水环境化学特征的研究方法作出了有意义的尝试。

Chemical characteristics of water environment of saline mire in the west of Songnen Plain

In the west of Songnen Plain , the saline alkali degree is high in saline water body and marsh where pH value is generally over 8 0, and the chemical type of water is HCO 3 2- -Na +. Through analysis on the basic saline alkali variables such as O 3 2- , HCO 3 2- , Cl -, Ca 2+ , Mg 2+ , SO 4 2- , Na + etc. and the composed variables such as (Cl -+SO 4 2- )/HCO 3 2- and Na +/(Ca 2+ +Mg 2+ ), the relationships between different variables were found, and the discriminating function and critical region map were got basing on the pH value, by which the significant study method on saline alkali water body was attempted.