Well-Withdrawal Footprint Mapping

WellFootprint & ModelMuse - Map App for Visualizing Withdrawals

Goode, D.J., Winston, R.B., Conlon, M.D., and Risser, D.W., 2018, WellFootprint and ModelMuse - A New Map App for Visualizing the Magnitude of Pumping (abs.): Pennsylvania Groundwater Symposium, May 8, 2018, State College, Pennsylvania.

Abstract & Slides

Mapping withdrawals relative to groundwater-resource metrics or limits

Goode, D.J., and Winston, R.B., 2016, Mapping groundwater withdrawals from wells relative to water-resource metrics or management targets (abs.): American Water Resources Association Annual Conference, November 13-17, 2016, Orlando, Florida.


Science Center Objects

A simple method for mapping groundwater withdrawals at wells provides an intuitive visualization of the magnitudes by displaying an area, the 'footprint', centered on each well to represent its volumetric rate. Footprints for closely spaced wells are combined to equitably display the area corresponding to the combined withdrawals. The size of the footprints on the map are controlled by a user-specified scale, the 'depth-rate-index', that can represent groundwater resource metrics, such as the recharge rate, or established withdrawal limits. Software and examples are provided. 

Groundwater withdrawals at wells are often shown on maps as circular symbols at each well, with the size (area) of the symbol proportional to the volumetric rate of pumping. "WellFootprint" software has been developed to improve this visualization in two ways: first, overlapping symbols at two or more closely spaced wells, which visually under-represent withdrawals, are merged into an irregularly-shaped combined 'symbol', called a 'footprint', the area of which proportionally displays the combined withdrawals; second, the scale of the symbols ("Depth-Rate Index", DRI: the ratio of the volumetric rate to the area of the symbol) can be defined as a water-resource metric, such as the recharge rate, so that the map shows how large the withdrawals are relative to that metric. Input data needed are limited to well locations, withdrawal rates, and the user-defined DRI. ModelMuse preprocessor and WellFootprint were used to prepare example well withdrawal footprint maps. The footprint map does NOT show areas that contribute recharge to wells, or capture zones - it is solely a visualization of the withdrawal magnitudes, centered on the wells.