Example of simulation of the calculation of a water well catchment area and isochrones.
Plotting the borehole catchment area
Developed by BRGM, Zappel software plots the borehole catchment area.
The catchment area can be defined as the area of an underground water table corresponding to groundwater flows which at some stage will end up at the borehole. This catchment area depends on the flow rate from the well and the water table characteristics.
Isochrone position calculation
Zappel also calculates the position of the isochrones. These are lines (contours) that connect points from which the time required for groundwater to reach the borehole is equal.
For example the 50-day isochrone means that any free molecule of water circulating in the underground water table at a location on this contour will take 50 days to reach the borehole, not taking dispersion phenomena into account.
Isochrones thus represent the interpolation of a set of points, each corresponding to a transfer time. The result can be exported in a SIG file.
- Operating system: Windows (XP, 7), Linux
- Programming language: C++
- Language: French