EvapoTranspiration and Recharge Model (ETRM) Distributed soil water - - PowerPoint PPT Presentation

EvapoTranspiration and Recharge Model (ETRM)

• Distributed soil water

balance model

• 250 m resolution
• Daily precipitation

(PRISM) drives the model

• Estimates ET and

runoff

• Recharge closes the

water balance

• Soil parameters come

from existing GIS datasets

EvapoTranspiration and Recharge Model (ETRM)

• Design

– Python – Easily adapted to

• ther study areas

at different scales

• Reference ET is

corrected for topography using GADGET

• Estimates diffuse

(inplace) recharge for the entire state

Focused Recharge

Walnut Gulch Experimental Watershed

Ongoing work

• Focused Recharge
• Improve soil parameter estimates

– Saturated hydraulic conductivity – Storage capacity

• Calibration and validation
• Ability to forecast recharge rates for different

scenarios

– Climate change – Land use change

Acknowledgments

• WRRI
• Fred Phillips, Dan Cadol, Jan Hendrickx (NMT

EES)

• David Ketchum, Peter ReVelle, Esther Xu,

Gabriel Parish (NMT Graduate Students)