Wellhead Area Delineation Methods

In this paper, methods and scientific fundamentals of the wellhead area delineation for the quality control of the drinking water resources in the cities, have been presented. At first, the available literature on criteria and methods of wellhead area calculation has been introduced. Then, the characteristics of each method has been evaluated by performing some calculations for drinking water well number 20 in Urmia City. At the end, the wellhead area of well number 20, along with the contaminant plume for a wastewater well near well number 20 were calculated using the computer code WHPA and the hydrogeologic data. The results of this study showed that if reliable hydrogeologic data are available, the semianalytical-numerical methods of the wellhead area delineation, have acceptable applicability for the users in the water industry.