尼洋河流域水化學(xué)特征及其控制因素
[Abstract]:In order to study the hydrochemical characteristics and control factors of Niyang River Basin, 7 groups of river water, 13 groups of well water and 10 groups of spring water were collected in 2014, and 30 groups of water samples were collected. The hydrogeochemical characteristics of river water, spring water and well water in the Niyang River basin are analyzed by means of mathematical statistics, Piper three-line diagram, Gibbs model and ion ratio, and the hydrochemical evolution law of the Niyang River basin is also discussed. The results showed that Ca~ (2), Mg~ (2), HCO_3~- and SO_4~ (2 -) were the main cations in river water, well water and spring water, accounting for more than 84% of the total cation, and the anions were mainly HCO_3~- and SO_4~ (2 -), accounting for more than 97% of the total anion content. TDS is between 79.11 mg 路L ~ (- 1) and 290.48 mg 路L ~ (- 1), the average value is 165.21 mg 路L ~ (- 1), the salinity is lower, and the hydrochemical type is HCO_ 3 路SO _ 4 (SO_ 4 路HCO _ 3)-Ca Mg (Mg 路Ca water, the main type is HCO_ 3 路SO _ 4 (SO_ 4 路HCO _ 3)-Ca Mg (Mg 路Ca. The hydrochemical samples are distributed in the middle left of the Gibbs model, indicating that the hydrochemical ion composition in the basin is controlled by rock weathering. The principal component analysis and correlation analysis show that the hydrochemical composition of Niyang River basin is controlled by the dissolution of silicate rock, and the dissolution of carbonate rock also plays a very important role.
【作者單位】: 中國地質(zhì)調(diào)查局水文地質(zhì)環(huán)境地質(zhì)調(diào)查中心;
【基金】:中國地質(zhì)調(diào)查局地質(zhì)調(diào)查項(xiàng)目(12120114059601,DD20160298)
【分類號】:X52
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