The fluctuation of watertable in a shallow unconfined aquifer due to rainfall, evapotranspiration, tubewell and canal supplies were determined using the recursive least squares method. The parameters were predicted by minimizing the mean square error between the estimated and measured watertable levels. Watertable fluctuations were found to be dependent upon pumping rates and recharge source such as prior rainfall, and were simulated by a multiple linear regression model. Such models can be used for forecasting and controlling the ground watertables and once formulated are ideally suited to the management of groundwater systems where more costly and complex methods cannot be used
