• Bindu Bhatt
• Janak Joshi

Water supply in India is going to be a serious challenge due to various reasons. The most serious concern is the growing population which is likely to increase to 1.66 billion by 2050. The per capita water availability in the country as a whole is reducing progressively due to increase in population. The average annual per capita availability of water in the country, taking into consideration the population of the country as per the 2001 census, was 1816 cubic meters which decreased to1545 cubic meters as per the 2011 census. Ground water is the main sources of water for drinking, industrial and domestic purposes and often, it is over exploited. Groundwater quality is therefore a major environmental aspect which needs to be analysed and managed depending on its spatial distribution. Also, continuous monitoring of groundwater is required by establishing a planned monitoring network in the study area for regular assessment of the WQI which will be useful in proper management of the water resource. The main goal of WQI is to transform complicated water quality data in an informative way which is easy to understand and commonly used by the people. Basing on several factors, WQI can give a simple note on water quality. By this a particular idea is generated in public regarding the issues of water quality in a specific region. Water quality index (WQI) is a very promising tool for evaluation. Generally, the WQI and Geographic Information System (GIS) are used to evaluate and map the spatial distribution of groundwater quality. Hence, the study of Water Quality Index of Vishwamitri watershed was computed using Geospatial technology. Water quality for 10 parameters such pH, Alkalinity, TDS, Hardness Calcium, Magnesium, Nitrate, Sulphates, Chloride, and Fluoride for two times period 2010-11 and 2016-17 are compared for water quality estimation. Water Quality Index maps are also generated. This study intends to demonstrate the utility of GIS combined with analytical data to assess and mapping of groundwater quality

Geo-Spatial, Ground Water, Spatio-temporal variation, WQI, Vishwamitri watershed

"Groundwater Quality Assessment Using Water Quality Index and GIS: A study of Vishwamitri Watershed, Gujarat ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.189-193, June-2019, Available :http://www.jetir.org/papers/JETIR1906C31.pdf

"Groundwater Quality Assessment Using Water Quality Index and GIS: A study of Vishwamitri Watershed, Gujarat ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp189-193, June-2019, Available at : http://www.jetir.org/papers/JETIR1906C31.pdf