Evaluation of water quality using geochemical modeling in the Bellary Nala Command area, Belgaum district, Karnataka State, India
Evaluation of water quality using geochemical modeling in the Bellary Nala Command area, Belgaum district, Karnataka State, India
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DOI：
10.1007/s13146-012-0124-3
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发表时间：
2013-09-01
影响因子：
1.4
通讯作者：
Somashekar, R. K.
中科院分区：
文献类型：
--
作者：
Ravikumar, P.;Prakash, K. L.;Somashekar, R. K.
本研究旨在评估25个水样的地球化学成分，以评价其是否适合Bellary Nala指挥区的饮用和灌溉目的。地球化学建模使用PHREEQC程序进行证实，在研究区的大多数样品是饱和和/或过饱和的硬石膏，方解石和石膏，而很少有不饱和的方解石，石膏，萤石和岩盐。根据Piper三线图解，Ca 2 +-Mg 2 +-HCO 3（-）是主要的水型（约占68%），这可能是研究区碳酸盐矿物如白云石和方解石溶解的结果。然而，阳离子交换过程可能是负责从CaSO 4和NaCl类型形成Ca 2 +-Mg 2 +-Cl--SO 4（2-）水型（类似于32%），这反过来又形成由于硬石膏，石膏和岩盐的溶解。Wilcox和USSL图示显示，大多数样品分别属于良好至允许和高盐度低钠（C3 S1）类别。因子分析结果表明，水质参数和饱和度指数分别占总方差的83.3%和80.72%，属于因子1和因子2，具有较强的负荷（> 75%）和特征值（> 1），是控制地下水化学变化的主要因素。
The present study aimed at assessment of geochemical composition of 25 water samples to evaluate their suitability for drinking and irrigation purposes in the Bellary Nala command area. Geochemical modeling carried out using PHREEQC program confirmed that majority of the samples in the study area were saturated and/or supersaturated with respect to anhydrite, calcite and gypsum while few were undersaturated with respect to calcite, gypsum, fluorite and halite. From Piper trilinear diagram, Ca2+-Mg2+-HCO3 (-) was found to be the dominant water type (similar to 68 %), which could be as a result of dissolution of carbonate minerals such as dolomite and calcite prevailing in the study area. However, cation-exchange processes could be responsible for the formation of the Ca2+-Mg2+-Cl--SO4 (2-) water type (similar to 32 %) from the CaSO4 and NaCl types, which in turn formed due to the dissolution of anhydrite, gypsum and halite. Wilcox's and USSL graphical representations showed that majority of the samples belong to good to permissible and high salinity-low sodium (C3S1) category, respectively. Factor analysis concluded that the water quality parameters and saturation indices that are falling under factors 1 and 2 with a strong loading (> 75 %) and eigen values (> 1) are mainly responsible for controlling the variation in the groundwater chemistry, accounting to 83.3 and 80.72 % of total variance, respectively.