Fig. 2: Stream water ages and climate. | Communications Earth & Environment

Fig. 2: Stream water ages and climate.

From: Groundwater dominates snowmelt runoff and controls streamflow efficiency in the western United States

Fig. 2

The age of stream water during winter baseflow (groundwater) was significantly (R2 = 0.68, p < 0.0001) related to the age of snowmelt runoff in high permeability sedimentary/ clastic catchments (red circles) but not in catchments underlain by low permeability hard rock/ shale geology (blue squares) (a). The only climate or landscape variable significantly (R2 = 0.27, p = 0.016) related to baseflow/groundwater age was snow persistence in high permeability sedimentary/clastic catchments (red circles) (b).

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