Groundwater quality and its suitability for drinking and agricultural use in Chithar River Basin, Tamil Nadu, India
Groundwater quality and its suitability for drinking and agricultural use in Chithar River Basin, Tamil Nadu, India
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DOI：
10.1007/s00254-005-1243-0
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发表时间：
2005-05-01
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影响因子：
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通讯作者：
Damodarasamy, SR
中科院分区：
文献类型：
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作者：
Subramani, T;Elango, L;Damodarasamy, SR
印度泰米尔纳德邦Chithar盆地地下水的水化学被用来评估地下水的质量，以确定其是否适合饮用和农业用途。测定了地下水的电导率、pH、总溶解固体(TDS)、Na+、K+、钙、镁、氯、HCO3-CO32-SO42-NO3-、F-、B-和SiO_2等物理化学参数。地下水中化学成分的浓度在空间上和暂时上是不同的。分析资料解释表明，研究区主要水化学相为钙-镁-氯、钙-氯和钠-氯混合相。碱土(Ca~(2+)、Mg~(2+))和强酸(Cl~-、SO_4~(2-))略高于碱土(Na~+、K~+)和弱酸(HCO_3~-、CO_3~(2-))。主要离子丰度为：Na+&Gt；=Ca2+&Gt；=Mg2+&Gt；K+=Cl-&Gt；HCO3-&Gt；SO42-&Gt；NO3-&Gt；CO32-。该地区的地下水一般坚硬，淡水到微咸水，高盐度到极高盐度，性质上是低碱性。高总硬度和少数地方的TDS表明地下水不适合饮用和灌溉。这些地区需要特别的照顾，以提供足够的排水和引入替代的耐盐作物种植。根据国际标准，氟和硼在人类消费和农作物允许的限度内。
Hydrochemistry of groundwater in Chithar Basin, Tamil Nadu, India was used to assess the quality of groundwater for determining its suitability for drinking and agricultural purposes. Physical and chemical parameters of groundwater such as electrical conductivity, pH, total dissolved solids (TDS), Na+, K+, Ca2+, Mg2+, Cl-, HCO3- CO32- SO42- NO3-, F-, B- and SiO2 were determined. Concentrations of the chemical constituents in groundwater vary spatially and temporarily. Interpretation of analytical data shows that mixed Ca - Mg - Cl, Ca - Cl and Na - Cl are the dominant hydrochemical facies in the study area. Alkali earths (Ca2+, Mg2+) and strong acids (Cl-, SO42-) are slightly dominating over alkalis (Na+, K+) and weak acids (HCO3-, CO32-). The abundance of the major ions is as follows: Na+ >= Ca2+ >= Mg2+ > K+ = Cl- > HCO3- > SO42- > NO3- > CO32-. Groundwater in the area is generally hard, fresh to brackish, high to very high saline and low alkaline in nature. High total hardness and TDS in a few places identify the unsuitability of groundwater for drinking and irrigation. Such areas require special care to provide adequate drainage and introduce alternative salt tolerance cropping. Fluoride and boron are within the permissible limits for human consumption and crops as per the international standards.