** Let's undertake a simple
FINITE DIFFERENCE EXERCISE based on the simplistic set-up that we used to illustrate
how finite differences work. Recall the problem involved a one-dimensional confined
aquifer, with a constant initial head across its length. Then instantly drop
the head on the right end of the aquifer while maintaining a constant head on
the left side.
we defined a grid on it, one unit thickness into the computer
screen
initial head will be the same for each cell
cell 1 will be a constant head equal to the initial head, H**