基于多元统计和AquaChem的天山南麓小流域水体化学计量特征

Water Body Stoichiometry Characteristics of Small Watershed in the South of Tianshan Mountain Based on Multivariate Statistics and Aqua Chem

为研究哈密河上游水体质量,设置了23个水质断面进行取样测定,并应用数理统计和Aqua Chem软件研究水体化学特性及其控制因素。结果表明,区域水体呈中性至弱碱性,水体中离子浓度结构不均衡,阴离子中以HCO_3^-和SO_4^(2-)为主,阳离子以Ca^(2+)和Mg^(2+)为主。Durov图表明,区域水化学为Cl^-·HCO_3^-+Na^+·Ca^(2+)型,水质受岩石风化和大气沉降控制。

In order to study the quality of water bodies in the upper stream of Hami River, 23 water quality sections were set for sampling and the water chemistry characteristics and control factors were studied by using mathematical statistics and AquaChem software. The results showed that the water bodies in the area were neutral to weakly alkaline, and the ion concentrations in water bodies were not balanced. HCOf and S042- mainly existed in the anions, while Ca： ＋ and Mg2 ＋ mainly dominated the anions. The Durov drawing shows that the regional water chemistry is Cl- ＊ HCO3- ＋ Na ＋ · Ca2＋ and the water quality is controlled by rock weathering and atmospheric deposition.