Geostatistical Analysis of Groundwater Level Variability Using Geoinformatics in Mehsana District, Gujarat, India
Keywords:
Geostatistical analysis, ordinary kriging, groundwater level fluctuations, spatial variabilityAbstract
The water ecology of Mehsana district is fragile where most of the people are dependent on groundwater for
their daily needs. The surface water sources are limited and with rapid growth in agriculture and dairy farming, the
encumbrance on groundwater has increased exponentially. The present study has analysed the variability in depth to
water level below ground level (bgl) from 2010 to 2014. Geostatistical analysis method, ordinary kriging has been used to
depict the groundwater surface map of the last five years of the district to study and analyse the spatial variability of
groundwater levels. Pre-monsoon and post-monsoon groundwater level fluctuations are used to generate groundwater
surface maps and trend graphs in GIS environment. Over exploitation of ground water is the single major issue in the
district resulting in the fast depletion of this resource. Piezometric heads of deep confined aquifer has also declined
sharply owing to the huge withdrawal.
