2.4 Derivation of HE flux in relation to the polynomial of water
level and its change rate
Assuming that (1) the flood wave at the site was approximately
sinusoidal; (2) the variation of wave amplitude was much smaller than
the thickness of the aquifer; and (3) the aquifer was relatively
homogeneous and had good permeability, the water head within the
riparian aquifer in response to the flood wave can be approximately
obtained as follows (Singh, 2004):