Laluraj C M, Gopinath Girish
National Institute of Oceanography, Regional Centre, Cochin, India.
Environ Monit Assess. 2006 Jun;117(1-3):45-57. doi: 10.1007/s10661-006-7675-5.
Spatial distribution of pH, electrical conductivity (EC), total dissolved solids (TDS), fluoride and total iron content of ground water samples collected from the muvattupuzha river basin, Kerala, India, has been studied for pre monsoon and post monsoon periods of year 2001. Results showed the groundwater of the basin is acidic for which the pH values ranged between 5.5 and 8.0. Average EC was found to be less than 100 microS/cm, for most of the study region. The pre monsoon minimum and maximum TDS were found as 25.6 and 227.84 mg/L respectively, where as post monsoon values ranged between 16 and 162.56 mg/L. The relatively low EC and TDS values found both during the seasons in the lateritic terrain of the river basin signifies the lower residence time of ground water with the country rock. This makes the groundwater quality of this river basin as good. Pre monsoon season samples showed high total iron content than that during the post monsoon period. During the study period values of the fluoride contents were found to be within the permissible limits.
对从印度喀拉拉邦穆瓦图普扎河流域采集的地下水样本在2001年季风前和季风后时期的pH值、电导率（EC）、总溶解固体（TDS）、氟化物和总铁含量的空间分布进行了研究。结果表明，该流域的地下水呈酸性，pH值在5.5至8.0之间。在大部分研究区域，平均电导率小于100微西门子/厘米。季风前TDS的最小值和最大值分别为25.6毫克/升和227.84毫克/升，而季风后的值在16毫克/升至162.56毫克/升之间。在该流域红土地形的两个季节中发现的相对较低的电导率和TDS值表明地下水与基岩的停留时间较短。这使得该流域的地下水质量良好。季风前季节的样本显示总铁含量高于季风后时期。在研究期间，氟化物含量的值被发现处于允许范围内。
