Environmental Implications of Moonsoon Seasonal Rainfall on Groundwater Regime of Rajpipla Region, Gujarat, India.

Abstract

The monsoon seasonal rainfall record of Rajpipla area confined to Gujarat state of India, for a period of
1987-2006, has been treated to mathematical and statistical analyses to observe variation pattern, future trends and
their environmental impacts on groundwater regime. The mathematical analysis of monsoon seasonal rainfall data
indicates a fairly good range of variation from 321.30 mm to 1319.30 mm with an average rainfall value of 925.61 mm
The years indicating positive trend of departure from the computed value of average seasonal rainfall point out
favourable intervals for recharge of ground water reservoir. The cumulative departure from the average rainfall except
for 1998 and 2006 reveals existence of negative trend. The statistical analysis of rainfall data determines statistical
parameters, which indicate rather alternative variation pattern. The forecast of future rainfall trend for a period of next
three years indicates an increasing trend in the expected rainfall amount. The environmental impacts of rainfall
phenomena have been discussed. The strategy for augmentation of rainfall amount to enhance the groundwater recharge
system for Rajpipla area has been suggested.