IGW-NET Modeling Concept

Vadose Zone via SwaNET/INFIL

Why coupled-model recharge beats in-IGW-NET infiltration.

Key takeaway: Recharge is often better represented by coupling watershed, soil, and infiltration tools than by forcing all vadose-zone process detail into the groundwater model.

The modeling point

Recharge is controlled by climate, land use, soils, topography, runoff, evapotranspiration, and unsaturated-zone behavior. IGW-NET can use recharge generated through SwaNET/INFIL workflows so groundwater receives a more process-informed recharge field.

Practical implication

Use the right process model for the right part of the hydrologic system. Groundwater models should not have to carry every surface and vadose-zone process internally when coupled workflows can provide better recharge estimates.