Geospatial analysis of groundwater quality using GIS: A case study of Ahafo Kenyasi, Ghana

The exploitation and sustainable use of groundwater has received much attention with the sudden decline in quantity quality surface water. Knowledge on current status physico-chemical parameters becomes important ensuring resource. This study used Geographic Information System (GIS) to assess Ahafo-Kenyasi particular focus determining spatial distribution also produce map area. Physico-chemical analyses were made after collection water samples from 24 community boreholes. results analysis carried out showed following concentration ranges: pH (5.12-6.54), EC (71.6-952μS/cm), TDS (35.08-465.59mg/l), Turbidity (0-6.25NTU), Ammonia (0.01-0.61mg/l), Nitrate (0.1-4.12mg/l), Sulphate (1-65.5mg/l). All analysed above guidelines set by World Health Organization (WHO, 2011) except for Turbidity. Spatial maps individual developed using kriging interpolation technique accepted based prediction performances Stable, Exponential, K-Bessel semivariogram models. Overall area was assessed Water Quality Index (WQI). that decreases north-western south-eastern. However, is good domestic purposes.