Evapotranspiration from Landsat for IDWR Curtailment Order William J. Kramber and Dr. Allan Wylie Idaho Dept of Water Resources Dr. Richard G. Allen University of Idaho Collaborators: Dr. Jeppe Kjaersgaard, Dr. Ricardo Trezza, Clarence Robison, University of Idaho Dr. Magali Garcia, University Lapaz, Bolivia Tony Morse, IDWR (retired), and Spatial Analysis Group NASA September 14, 2009
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Evapotranspiration from Landsat for IDWR Curtailment Order
Evapotranspiration from Landsat for IDWR Curtailment Order. William J. Kramber and Dr. Allan Wylie Idaho Dept of Water Resources Dr. Richard G. Allen University of Idaho. Collaborators: Dr. Jeppe Kjaersgaard, Dr. Ricardo Trezza, Clarence Robison, University of Idaho - PowerPoint PPT Presentation
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Evapotranspiration from Landsat for IDWR Curtailment Order
Evapotranspiration from Landsat for IDWR Curtailment Order
William J. Kramber and Dr. Allan Wylie Idaho Dept of Water Resources
Dr. Richard G. AllenUniversity of Idaho
Collaborators:Dr. Jeppe Kjaersgaard, Dr. Ricardo Trezza, Clarence Robison, University of Idaho Dr. Magali Garcia, University Lapaz, BoliviaTony Morse, IDWR (retired), and Spatial Analysis Group
NASA
September 14, 2009
Why is Evapotranspiration (ET) important?
Why is Evapotranspiration (ET) important?
• ET shows the amount of water ET shows the amount of water consumed by irrigated agricultureconsumed by irrigated agriculture
• Idaho has 3.4 million acres of irrigated Idaho has 3.4 million acres of irrigated agricultureagriculture
• Irrigated agriculture accounts for over Irrigated agriculture accounts for over 90% of the water consumed in Idaho90% of the water consumed in Idaho
Water Law TermsWater Law Terms
• Water RightWater Right Authorization to use waterAuthorization to use water Includes priority dateIncludes priority date
• CallCall When a senior water right holder experiences a When a senior water right holder experiences a
water shortage they may place a callwater shortage they may place a call
• Curtailment OrderCurtailment Order Defines how the state directs junior water right Defines how the state directs junior water right
holders to stop diverting water in response to a callholders to stop diverting water in response to a call
7/31/2009
Clear Springs Foods, Inc.
Thousand Springs
8/11/2009
8/1/2009
In the pastIn the past
• Potential ET using crop coefficientsPotential ET using crop coefficients Needs crop type acres and stage of Needs crop type acres and stage of
growthgrowth Produces one ET value per countyProduces one ET value per county
In the presentIn the present
• Actual ET from Landsat using METRIC Actual ET from Landsat using METRIC No crop information requiredNo crop information required ET per pixel can be summed by fieldET per pixel can be summed by field
Landsat p40r30, 20060722
GW Model Cells and Water Rights
METRIC ET 2006 April to Oct.
METRIC ET 2006 August to Oct.
Attributes: ET by model cell and water right
ESPA GW model analysis
8/24/2009
SummarySummary
• ESPA GW model used METRIC ET dataESPA GW model used METRIC ET data For model calibrationFor model calibration To select water rights to curtailTo select water rights to curtail
• No complaints from junior users about No complaints from junior users about GW model or METRIC ET dataGW model or METRIC ET data