Evapotranspiration from Landsat for IDWR Curtailment Order
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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
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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
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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
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7/31/2009
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Clear Springs Foods, Inc.
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Thousand Springs
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8/11/2009
8/1/2009
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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
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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
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Landsat p40r30, 20060722
GW Model Cells and Water Rights
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METRIC ET 2006 April to Oct.
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METRIC ET 2006 August to Oct.
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Attributes: ET by model cell and water right
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ESPA GW model analysis
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8/24/2009
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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
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More InformationMore Information
www.idwr.idaho.govwww.idwr.idaho.gov
www.kimberly.uidaho.edu/water/metricwww.kimberly.uidaho.edu/water/metric
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AcknowledgementsAcknowledgements
Dr. Masahiro Tasumi, University of Miyazaki, Japan
Dr. Wim Bastiaanssen, WaterWatch
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Wish ListWish List
• Four Landsat satellites to collect an Four Landsat satellites to collect an image of the same area every 4 daysimage of the same area every 4 days
• Cloud and shadow algorithm or mask Cloud and shadow algorithm or mask included with imagesincluded with images
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Snake River Plain
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ESPA Ground Water ModelESPA Ground Water Model
• MODFLOWMODFLOW Developed by the USGSDeveloped by the USGS Perhaps the most used ground water modelPerhaps the most used ground water model
• Ground Water Flow modelGround Water Flow model Used to track the impact of various Used to track the impact of various
administrative decisionsadministrative decisions
• Calibrated to 22 years of dataCalibrated to 22 years of data 1 May 1980- 30 April 20021 May 1980- 30 April 2002 15987 observations15987 observations
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For information about the Ground Water Model
For information about the Ground Water Model
Dr. Allan WylieIdaho Department of Water Resources322 East Front StPO Box 83720Boise, ID 83720-0098
Phone 208 287 4963e-mail [email protected]