Abstract

ANALYSIS OF GROUND WATER QUALITY OF KALIMATI AREA, KATHMANDU, NEPAL: A REVIEW

*Sunil Ram Vaidya, Ph. D.

Abstract

Principles of Water Quality present the fundamental environmental processes that regulate the movement of materials in natural systems. Water quality is dependent on the type of the pollutant added and the nature of mineral found at particular zone of bore well. Monitoring of the water quality of ground water is done by collecting representative water samples and analysis of physicochemical characteristics of water samples at different locations of Indore City. Estimation of water quality index through formulation of appropriate using method and evaluate the quality of tube well water by statistical analysis for post and pre monsoon seasons. The seasonal values of WQI indicate that during summer season, lake water is more affected than during winter. This could be due to the fact that the microbial activity get reduced due to low temperature, thereby keeping DO level at a very satisfactory range during entire winter season. The suggested measures to improve the lake water quality includes total ban on the activities that causes pollution. Result of water quality assessment clearly showed that most of the water quality parameters slightly higher in the wet season than in the dry season. Water quality is dependent on the type of the pollutant added and the nature of self-purification of water. Groundwater is an essential and vital component of any life support system. It is not only the basic need for human existence but also a vital input for all development activities. Physico-chemical parameters such as pH, electrical conductivity, total dissolved solids, total hardness, calcium, magnesium, sodium, potassium, bicarbonate, sulfate, and chloride are used to assess the suitability of groundwater for domestic purpose by comparing with the WHO and Nepalese standards.

Keywords: Ground water, water quality standards, physico-chemical, Water Quality Index.