The purpose of this model is to simulate the interaction between a surface water reservoir pool and a groundwater aquifer below the ground surface. In this representation, it assumed that the aquifer (groundwater storage location/volume) is much larger/greater than the surface reservoir. As a result, the groundwater surface elevation is assumed to be independent of the reservoir water volume. In other words, groundwater levels are specified using a fixed value or a time series which is external to the simulation. The groundwater level then is not directly impacted by the reservoir water level and by reservoir seepage but it does determine if seepage flow occurs into the reservoir or from the reservoir to the aquifer. Groundwater volumes and groundwater water balances are not tracked in this model.
The surface reservoir is not simulated in this model but rather a hypothetical changing water level is provided as input. You can use this model to interact with an actual reservoir model by linking the "Seepage_In" as inflow to the surface reservoir and "Seepage_Out" as the outflow from it.
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