Mahato Sanjay, Mahato Asmita, Karna Pankaj Kumar, Balmiki Nisha
Aasra Research and Education Academy Counsel, Janapriya Tole, Biratnagar-7, Nepal.
Nepal Batawaraniya Sewa Kendra, Biratnagar-9, Nepal.
BMC Res Notes. 2018 May 21;11(1):321. doi: 10.1186/s13104-018-3445-z.
This study aims at assessing the groundwater quality of the three districts of Eastern Terai region of Nepal viz. Morang, Jhapa, Sunsari using physicochemical characteristics and statistical approach so that possible contamination of water reservoir can be understood. pH, temperature, conductivity, turbidity, color, total dissolved solids, fluorides, ammonia, nitrates, chloride, total hardness, calcium hardness, calcium, magnesium, total alkalinity, iron, manganese, arsenic have to be analyzed to know the present status of groundwater quality.
Results revealed that the value of analyzed parameters were within the acceptable limits for drinking water recommended by World Health Organization except for pH, turbidity, ammonia and iron. As per Nepal Drinking Water Quality Standards, fluoride and manganese too were not complying with the permissible limit. Electrical conductivity, total dissolved solids, chloride, total hardness, calcium hardness, manganese, and total alkalinity show good positive correlation with major water quality parameters. Calcium, magnesium, total hardness, calcium hardness and total alkalinity greatly influences total dissolved solids and electrical conductivity. ANOVA, Tukey, and clustering highlight the significance of three districts. Groundwater can be considered safe, but there is always a chance of contamination through chemical wastes in the heavily industrialized area of Morang and Sunsari Industrial corridor.
本研究旨在利用物理化学特征和统计方法评估尼泊尔东特莱地区三个区（即莫朗、贾帕、孙萨里）的地下水质量，以便了解水库可能受到的污染情况。必须分析pH值、温度、电导率、浊度、颜色、总溶解固体、氟化物、氨、硝酸盐、氯化物、总硬度、钙硬度、钙、镁、总碱度、铁、锰、砷，以了解地下水质量的现状。
结果显示，除pH值、浊度、氨和铁外，分析参数的值在世界卫生组织推荐的饮用水可接受范围内。根据尼泊尔饮用水质量标准，氟化物和锰也不符合允许限值。电导率、总溶解固体、氯化物、总硬度、钙硬度、锰和总碱度与主要水质参数呈良好的正相关。钙、镁、总硬度、钙硬度和总碱度对总溶解固体和电导率有很大影响。方差分析、图基检验和聚类分析突出了三个区的显著性。地下水可被认为是安全的，但在莫朗和孙萨里工业走廊的重工业区，始终存在通过化学废物污染的可能性。
