Long Term Management Plan for Pollutant Mass Reduction by Variable Withdrawal Rates in a Confined Aquifer

Groundwater, extracted from aquifers which are the deep geological formation through pumping wells, forms a vital component of many water resource systems. Pollution of groundwater has become a major problem for its safe utilization. The flow of groundwater pollutants in an aquifer depends upon boundary conditions, initial conditions, hydro geological information and wells. Deep rooted planning of groundwater usage requires a well decision support tools which are based on analysis. The main requirement of such tools is that they are to be able to forecast the change in the groundwater storage with adequate precision, and must permit exploring management scenarios. The temporal and spatial distribution of pollutants from different fields can be studied by 2-D and 3-D groundwater modeling. A groundwater model gives a quantitative structure for amalgam of field information and for conceptualizing hydro geologic process. A concentration response matrix was obtained by using the analytical simulation model. The concentration over time gets computed by model which is due to the processes like hydrodynamic dispersion, convective transport and fluid sources dilution. This study aims to analyze the plume behaviour with variation in pumping well discharge. The flow and transport simulation model MOC (USGS) is used for getting different response data sets of pollution concentration realization at pollutant monitoring locations of the study area. The pollutant concentration values at each node of the study area are found for a management period of 5 years and various cases along with scenarios are developed to find out best management plan for pumping schedule.