Dear WEAP users,
I am currently using the Soil Moisture Method (SMM) to represent my overall catchment. The catchment is not connected to the groundwater (GW), and I have manually entered natural recharge values directly into the GW node (using the Specify GW–SW Flows method).
However, when I create an infiltration link from my SMM catchment to the GW, the inflows from the catchment become very small compared to the known natural recharge. Therefore, I would like to ask: Should I still keep using the measured natural recharge values in the GW node, or should I instead calibrate the deep soil layer parameters of the catchment and remove the predefined recharge values?
Additionally, I am curious about the hydrological interactions when no infiltration link is created between the catchment and GW. As far as I understand, the deep soil layer simulates interflow and baseflow processes directly to the river. However, in such a setup, although I have groundwater and demand sites supplied from GW, it is not possible to represent baseflow as an outflow from the GW system (not accounted for in the GW storage balance). Could anyone provide further explanation or suggestions about the best way to represent this interaction?
Thank you in advance,
Selin