The equation representing the groundwater mound beneath a rectangular recharge area is given by:
where hm is the maximum height of the mound; hi is the initial height of the water table; w is the recharge or percolation rate; K is the hydraulic conductivity; t is the time of interest; L and W are the length and width of the rectangular recharge area, and ε is the specific yield of the aquifer. S* is an integral equation given by:
This equation is estimated in the calculator by using a table of values given by Hantush (1967).
You can also perform mounding calculations with graphical display using: