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AgriMet Network TWG 2012 Jama Hamel

AgriMet Network TWG 2012 Jama Hamel . AgriMet Network Expansion Since 1983. AgriMet Partnerships. Over 25 entities, including: Federal agencies State agencies Soil & water conservation districts Universities Public utilities Private enterprise. AgriMet Operations: Data Collection.

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AgriMet Network TWG 2012 Jama Hamel

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  1. AgriMet NetworkTWG 2012Jama Hamel

  2. AgriMet Network Expansion Since 1983

  3. AgriMet Partnerships • Over 25 entities, including: • Federal agencies • State agencies • Soil & water conservation districts • Universities • Public utilities • Private enterprise

  4. AgriMet Operations:Data Collection

  5. Hourly Data Transmissions • Channel 170 (100% HDR in 2008) • Transmit from 00:15:00 to 00:30:00 • Stations transmit alphabetically • Data posted to the website each hour

  6. AgriMet Operations:ET Computation

  7. AgriMet uses the 1982 Kimberly-Penman ET model • Developed by USDA Agricultural Research Service in Kimberly, Idaho • Alfalfa based reference model

  8. Crop coefficients relate reference ET to crop specific ET: ETc = ETrx Kc ETc Specific Crop Consumptive Use ETr Reference Evapotranspiration (Alfalfa) Kc Crop Coefficient (varies with time)

  9. Generalized Crop Coefficients for Field and Row Crops From: Allen, R. G

  10. ET can vary considerably from one day to the next

  11. AgriMet Operations:Site Maintenance and Calibration

  12. Precision Relative Humidity/Temperature Chamber

  13. AgriMet Operations:Data Quality Control / Quality Assurance

  14. Automated Q/C • Satellite transmission quality checks • Upper and lower limit checks on sensor data • Rate of change between consecutive readings

  15. Manual Q/C • Every morning, data graphically reviewed • Geographically similar stations grouped • All weather parameters reviewed • Bad data estimated or deleted • Dependent computations (ET) recomputed

  16. AgriMet Operations:Other Uses of AgriMet Data

  17. Other uses of AgriMet information • National Weather Service • State DEQ investigate pesticide application and ground water contamination issues • Electric utilities model heating/air conditioning and peaking power requirements • State water departments

  18. Other uses of AgriMet information: Verification and calibration of satellite technologies

  19. Other uses of AgriMet information: Source of ET data for “Smart Irrigation Controllers” for Turf Grass

  20. Questions?

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