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MODULE-2 Wellhead Protection Areas
- Wellhead Protection Areas
- Wellhead Protection Area Delineation Methods
- Selecting a Wellhead Protection Area Delineation Method
Wellhead Protection Area Delineation Methods
Analytical Methods
Analytical methods include simple mathematical calculations and graphical methods to delineate wellhead zones of contribution or simple analytical solution based computerized groundwater flow models (Figure 3). While they require more skill and data (including hydraulic gradient, hydraulic conductivity, saturated thickness, and hydrogeologic divides) than the calculated fixed radius method, analytical models use equations that are generally easily understood by hydrogeologists and civil engineers.
In many cases, a simple analytical model (such as EPA's WHPA Code ), may provide a good approximation of the time of travel boundaries. However, in settings with significant aquifer boundaries and non-uniform hydrogeologic characteristics, more sophisticated methods such as detailed hydrogeologic mapping or numerical modeling may be warranted.
