Description

Hydraulic gradient and direction of flow ofaquifers can now be found on site with the help of your phone's GPScapabilities. Automating the hand-drawn hydraulic gradient approachdescribed by the USGS in Basic Groundwater Hydrology, theGroundwater Flow Calculator quickly calculates the hydraulicgradient and direction of flow of an area where at least threegroundwater monitoring wells are set-up in a triangular pattern.

Once you begin the program, three input screens will appearone-by-one. Each screen represents one of three groundwatermonitoring wells and will require five inputs. The five inputs arethe latitude and longitude of the monitoring well, the elevation ofthe land surface where the monitoring well is located, the lengthof the monitoring well casing from the land surface to the top ofthe well casing, and the depth from the top of the well casing tothe groundwater. The latitude and longitude for each of themonitoring wells can either be input manually or can beautomatically input using your phone's GPS coordinates.

Results from the calculations are automatically shown aftercompleting the inputs for the third monitoring well. Hydraulicgradient information will be given in units of m/m and thedirection of flow will be given in degrees clockwise from TrueNorth. The corresponding map shows the location of the threemonitoring wells.

For more information please visit our website: http://agrilife.org/gfc/