Conventionally, the groundwater draft is estimated by unit draft method using mainly well census data. The number of wells of different types available in the area are multiplied with the unit draft fixed for each type of well to estimate the groundwater draft. But, upto-date well census and average withdrawal for each type of well are not precisely known. In some parts of the country, the groundwater draft is estimated based on the electricity consumed by the agricultural pump sets multiplied with the quantity of water discharged per unit power approximately gives the quantity of groundwater withdrawn. However, the power consumed by pump sets is not always proportional to the groundwater withdrawal and it depends mainly on the depth of the water table and efficiently of the pump sets. Further, misuse of power for other agricultural purposes and the groundwater draft from non-energized wells is also not taken into account in this method. Thus, by and large, the scientific community involved in groundwater budgeting in the country has been looking for a more realistic and appropriate method for groundwater draft estimation.