Simulation of septic system disposal unit

The specific objectives of this study were to (1) select a suitable three dimensional groundwater flow model capable of performing groundwater flow simulations in the unsaturated media, (2) develop a conceptual groundwater flow model to simulate the conditions pertaining to an ETA drainfield, and (3) apply the numerical groundwater flow model to observed field conditions for the Phase I ETA trenches in order to simulate the effects of seasonal variations on the infiltration and ET patterns around the drainfield.