Figure 4. HydroGeoSphere simulated exchange rates across the
water-sediment interface and water-jam interface for the eight scenarios
where the logjam permeability, quantity of logjams, and/or discharge
change. The area in front of each logjam is the hotspot for surface
water infiltration, while the area behind the logjam is the hotspot for
groundwater exfiltration. The submerged area of the flume in these
scenarios are different due to changes in backwater effects. Generally,
more logjams, higher flow rates, or lower logjam permeability will
create more of a backwater effect and thus extend the area available for
exchange with the subsurface.