Spatial Decision Support System for Groundwater Quality Management Using Geomatics

Abstract

The quality of groundwater is very important in evaluating its utility for agriculture, domestic and industrial purposes. In the present study, it is proposed to develop 'spatial decision support system (SDSS) for ground water quality management at village level using Geomatics' for verifying the number of borewells required, based on the population in the village and their spatial distribution for the decision makers, NGOs, government authorities, etc. Further, the proposed SDSS will also help in carrying out the study and analysis of changes in water quality parameters with respect to pre- and post-monsoon seasons and their consequent impacts on human health. Keeping these points in view, a spatial decision support system (SDSS) has been formulated and developed in GIS environment for taking appropriate decisions for groundwater quality management at village level. Nandyal Mandal, Kurnool district, Andhra Pradesh, India, with 20 villages has been considered for this study. Nitrates and sulphates are present in 140 samples out of 310 samples collected in post-monsoon season data samples. These samples need to further laboratory analysis for calculating the concentration of nitrates and sulphates in all 140 samples located in various villages. The borewell having ID No. 133401332 located at DPEP School in Ayyalur village is having excess TDS, alkalinity, hardness, and presence of nitrates and sulphates, which shows that the borewell is not suitable for drinking purpose.