The rainfall data analyses for a period of 31 years (1985 to 2015) have been conducted, which reveal the environmental impacts on recharge of ground water reservoir of the Bagh area, located in Dhar district of, Madhya Pradesh, India. The rainfall data have been analyzed by both the mathematical and statistical methods of data analysis. The mathematical analysis reveals a fairly good range of variation from 289.4 mm to 1230.mm with an average of 705.33 mm. The annual departures with respect to the average rainfall and cumulative departure indicate the positive and negative recharge trends of ground water reservoir. The statistical method of rainfall data provides the values of Mean = 1000.08 mm, Median = 1037.58 mm, Mode = 1222.22 mm, Standard Deviation = 328.59 mm, Co-efficient of Dispersion = 0.3254 mm, Co-efficient of Variation = 32.54 and Co-efficient of Skewness = - 0.6468. The statistical treatment of rainfall data provides precise values indicating the nature of recharge trend.
Time series analysis of rainfall data has been performed to forecast the trends of expected future rainfall. The computed high values than the average, infer the increasing trend of rainfall amount indicating favourable period for recharge to ground water system, whereas, low values than the average rainfall point the negative trend of ground water recharge that reflect shortage of water supply resulting into the water crisis. The rainfall is very important hydrometreological aspect, which controls the recharge of ground water system. The environmental impacts of rainfall on the ground water system have been discussed. Rainfall factor plays a key role by affecting the environment of forest, society, and optimum development of the agriculture and vegetation.