Depth To Water

ground surface ------------------| |-------------------------
                                 | |   |       |            |
                                 | |   | d0    |            |
                                 | |   |       | d1         |
                                 | |   |       |            |
water table t_o    ---------------------       |            |
                   |             | |           |            |  L
                h0 |             | |           |            |
                   |             | |           |            |
water table t_1    |        --------------------            |
                   |        |    | |                        |
                   |     h1 |    | |                        |
                   |        |    | |                        |
                   |        |    | |                        |
sensor             |________|____|*|________________________|

(1)d(t) = L - h

(2)d(t) = l(t) - h

where l(t)

(3)l(t) = L_{0} + \frac{(L_{1}-L_{0})}{(t_{1}-t_{0})}*(t-t_{0})

To calculate depth_to_water at a given time t use (1)

To calculate depth_to_water at a given time t and corrected for drift use (2)