Groundwater App to Determine Flow Direction and Gradient

Abstract A computational program, called the groundwater flow calculator, was created to quickly and easily determine the hydraulic gradient and direction of groundwater flow. The groundwater flow calculator automates the hand‐drawn process by Ralph Heath in the U.S. Geological Survey ( USGS ) Water Supply Paper 2220. In addition, a mobile app was developed to allow this procedure to run on a smart phone for use in the field.