GroundwaterSurface Water Interactions What hydrologic role does the

Groundwater-Surface Water Interactions • What hydrologic role does the meadow play in the greater watershed? – How does meadow hydrology reflect watershed processes? – What is meadow ET? How does it compare to watershed ET on short (daily) and long (annual) time scales? – How do meadow processes play out in the downstream hydrograph? – How much water moves from the hill slope through the meadow and into the stream? • What is the resiliency of the meadow to perturbations such as drought or changing climate?

Data: Hydrologic data Snow Depth Soil Moisture Stream Flow Gradient

Data: Meadow GW gradient

Data: major ions -- stream 7. 0 MMO 2011 6. 0 August Ca (mg/L) 5. 0 4. 0 > g ll a F November rin Sp 3. 0 June-July 2. 0 1. 0 June 1 st 0. 0 2. 0 Na (mg/L) 4. 0 6. 0

Analysis: Mixing diagrams* w/ selected endmembers, stream samples Sprin g→ Fall (*EMMA and PCA using 4 conservative species)

Analysis: Mixing diagrams w/ selected endmembers, stream & saprollite wells Sprin g→ Fall

Analysis: Mixing diagrams w/ selected endmembers, stream, saprock wells & edge wells Sprin g→ Fall

Analysis: Mixing diagrams w/ selected endmembers, stream, saprock wells, edge wells & center wells Sprin g→ Fall

Eddy Correlation in Long Meadow

Holbrook et al. (2014)

Data: major ions -- meadow 8. 0 Meadow center wells 7. 0 Ca (mg/L) 6. 0 5. 0 4. 0 Meadow edge wells MMO (Stream) MMW 2 3. 0 MMW 3 2. 0 MMW 4 1. 0 MMSPS 1 (Saprolite) MMW 5 MMSPN 1 (Saprolite) 0. 0 2. 0 4. 0 Na (mg/L) 6. 0 8. 0