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Southern Sierra Annual Meeting Critical Zone Tree (CZT-1) Update

Southern Sierra Annual Meeting Critical Zone Tree (CZT-1) Update. Hopmans , Hartsough , Malazian , Nasta , Albane , Tamir and Katya UC Davis Sept. 8, 2009. 4. MPS-1, 30cm Vertical pit, 4 MPS-1 and 4 EC5-TE probes, 15cm, 30cm, 60cm, 90cm

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Southern Sierra Annual Meeting Critical Zone Tree (CZT-1) Update

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  1. Southern Sierra Annual MeetingCritical Zone Tree (CZT-1) Update Hopmans, Hartsough, Malazian, Nasta, Albane, Tamir and Katya UC Davis Sept. 8, 2009

  2. 4 MPS-1, 30cm Vertical pit, 4 MPS-1 and 4 EC5-TE probes, 15cm, 30cm, 60cm, 90cm 1½” conduit will carry wires from two transects UCM pits Tensiometers Transect radius = 5m 3 80cm N 5 2 6 1 VP1 VP2 CR1000 7 VP4 12 VP5 VP3 VP6 8 CR1000 11 Three logger boxes house 2 CR1000s, 6 mulitplexers and a 2 RF 450 radios 9 10

  3. Sap flow sensors Water balance instrument clusters 50m Flux tower and Met Station 150 soil moisture and water potential sensors

  4. 150 Soil Sensors at the site Decagon Echo 5TE, MPS-1 Sensors as well as tensiometers

  5. CZT-1 30cm Temperature Volumetric WaterContent Stem Water Potential

  6. CZT-1 30cm Temperature Volumetric Water Content Soil Water Potential

  7. 1 mm/d 0.3 mm/d 0.5 mm/d

  8. Tree Instrumentation and Measurements

  9. Stem Water Potential

  10. Sap Flux

  11. Comparison of tensiometer with MPS(Uncertainty is about 100 cm in wet range)

  12. OUTFLOW METHOD – BUCHNER FUNNEL

  13. Optimization of hydraulic function parameters, by fitting measured with simulated drainage flow rates O(b) = WiQo(ti) – Qc(ti,b)2

  14. Soil water retention and unsaturated hydraulic conductivity relationships

  15. Depth to Bedrock CZO

  16. Tree Radar Inc.

  17. Near-future activities planned – September 2009 • LIDAR – LAI estimates for tree canopy geometry and evapotranspiration modeling; • Install additional sapflow instrumentation • Laboratory measurements of TDR, heatpulse, electrical resistance and sapflow in destructive tree wood samples; • Evaluate soil moisture instrumentation results – EchoTE and MPS; • Coupled three-dimensional modeling of coupled soil-tree trunk system as a integrated porous domain with atmospheric boundary condition; • Measurement of soil hydrologic properties and drainage fluxes; • Collaborate with Christine on RHESsys watershed-scale modeling of soil moisture

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