The rainfall data analysis for a period of 31 years has been conducted to visualize the environmental impacts on groundwater system of Ujjain area, situated in Madhya Pradesh, India, The rainfall data have been subjected to the mathematical and statistical treatment. Mathematical analysis indicates a fairly good variation range from 497.8 mm to 2019.mm with an average of 994.98 mm. The annual departures with respect to the average rainfall and cumulative departure both reflect the positive and negative recharge trends of groundwater system. The statistical computations of rainfall data reveal 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.

The time series analysis of rainfall data has been conducted to envision the trends of expected future rainfall. The computed high values infer the increasing trend of rainfall amount than the average, indicating favourable period for recharge to groundwater system, whereas, low values than the average, pointing the negative trend of recharge that reflecting shortage of water supply, which causes the crisus. The rainfall is most vital hydrometreological factor that controls the recharge of groundwater system. This rainfall is an important factor influencing the environment of society, forest and optimum growth of agriculture and vegetation. The environmental impacts on the ground water system are discussed.