This paper deals with an account of rainfall variation trend analysis and impacts on the recharge of ground water system of Barwani area, confined to Barwani district, Madhya Pradesh, India. Rainfall data for a period of 31 years (1985 to 2015), have been treated with methods of mathematical and statistical analyses. The mathematical analysis reveals that the minimum rainfall of 420.4 mm has been recorded during the year of 2000, and maximum rainfall of 1288.1 mm has been observed during the year of 2006. The calculated value of annual average rainfall has been determined as 742.8 mm. The departure from the annual average rainfall indicates both the positive and negative trends, whereas the cumulative departure points out negative trend of recharge. The statistical analysis of rainfall data involves the computation of central tendencies (Mean = 735.48 mm, Median = 750 mm, Mode = 775 mm.), and Standard Deviation = 192.64 mm, Coefficient of Dispersion = 0.261, Coefficient of Variation = 26.19 and Coefficient of Skewness = (- 0.205). These parameters indicate rather negative trend of recharge phenomena.

The environmental impacts of rainfall patttern on the recharge of ground water system have been discussed. The results of rainfall data analysis provide encouraging rainfall trend for the recharge of ground water system. The launching of proper programme for augmentation of rainfall phenomena by a forestation, which would increase the recharge of ground water resource by the implementation of rainwater harvesting system. The increase in rainfall would enhance the recharge of ground water system. The suggested measure would provide remedy to resolve the existing problems of sustained water supply to inhabitants of Barwani area.