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Using StateCU Crop Consumptive Use Model

Using StateCU Crop Consumptive Use Model

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Using StateCU Crop Consumptive Use Model

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  1. Using StateCUCrop Consumptive Use Model • Background Information • Examples of how to use StateCU: • Climate Station Scenario • Wizard Walkthrough • Additional Considerations • Results • Structure Scenario • Wizard Walkthrough • Additional Considerations • Results Wednesday, March 21, 2012

  2. Historic Consumptive Use • Historical consumptive use (HCU) should be quantified month-by-month comparing monthly diversion records against the monthly irrigation water requirement (IWR). • Comparing long-term average monthly diversions and IWR will result in an incorrect historical consumptive use value. Water long months moderate water short months, which will show HCU when water was not diverted or available from soil moisture. • The portion of the historical diversions non-consumed are return flows. • Return flows can be surface flows or groundwater return flows. • Timing of return flows need to be considered. • Return flows must be maintained in time and location as part of a water rights change case.

  3. HCU Data Needs • Climate Data • ET Methods • Crop Characteristics and Coefficients • Irrigated Lands – Acreage, Crop Types, Soils • Etc.

  4. Colorado’s Decision Support Systems CDSS is a great starting point for HCU analyses. • CDSS Website • Suite of Tools

  5. CDSS Websitehttp://cdss.state.co.us

  6. Suite of Tools • TSTool • StateDMI • StateCU

  7. TSTool

  8. TSTool • Time Series Tool • Displays • Manipulates • Analyzes • Write various formatted output files • Links to HydroBase • Can use external files

  9. StateDMI

  10. StateDMI • Data Management Interface (DMI) • Creates Modeling Input Files • Processes and Formats data • Two Modes • StateCU • StateMod • Links to HydroBase

  11. StateCU

  12. StateCU • Crop Consumptive Use Model • Practical Application • Software • Scenarios • Methods

  13. StateCU • Practical Application of StateCU • Potential Consumptive Use • Irrigation Water Requirement • Water Supply Limited Consumptive Use • Individual field or farm • Ditch-wide analysis • River basin-wide analysis

  14. StateCU • Software • Graphical User Interface (GUI) • New Scenario Wizard • FORTRAN executable program

  15. StateCU • Scenarios • Climate Station • Potential Consumptive Use (PCU) • Crop Irrigation Water Requirement (CIR or IWR) • Structure • Water supply limited by structure • Water supply limited by structure considering ground water • Water supply limited by structure and priority

  16. StateCU • Methods • Through the GUI • Monthly: • Original Blaney-Criddle • Modified Blaney-Criddle • Pochop (for bluegrass only) • Daily: • ASCE Standardized Penman-Monteith(Wizard is not setup to create a daily dataset at this time)

  17. StateCU • Methods • Through DOS executable • Monthly: • Original Blaney-Criddle • Modified Blaney-Criddle • Pochop (for bluegrass only) • Daily: • ASCE Standardized Penman-Monteith • Penman-Monteith • Modified Hargreaves

  18. Where to start a HCU analysis? • Quick General Information Analysis • Climate Station Scenario • Potential Evapotranspiration (ET) • Crop Irrigation Water Requirement (CIR or IWR)

  19. Climate Station Scenario • Climate Station Scenario • Wizard Walkthrough • Additional Considerations • Results

  20. Climate Station Scenario

  21. Climate Station Scenario

  22. Climate Station Scenario

  23. Climate Station Scenario

  24. Climate Station Scenario

  25. Climate Station Scenario

  26. Climate Station Scenario

  27. Climate Station Scenario

  28. Climate Station Scenario

  29. Climate Station Scenario

  30. Climate Station Scenario

  31. Climate Station Scenario

  32. Climate Station Scenario

  33. Climate Station Scenario

  34. Climate Station Scenario

  35. Climate Station Scenario

  36. Climate Station Scenario

  37. Climate Station Scenario

  38. Climate Station Scenario

  39. Climate Station Scenario • The Wizard has now created the dataset. • Data has been saved into a default location: C:\CDSS\Data\STATECUWIZARD\[scenario name] • What is next?

  40. Climate Station Scenario

  41. Climate Station Scenario

  42. Climate Station Scenario

  43. Climate Station Scenario

  44. Climate Station Scenario

  45. Climate Station Scenario

  46. Climate Station Scenario

  47. Climate Station Scenario • Slight detour • Effective Precipitation Methods • None • Monthly Methods (monthly or daily analyses) • SCS TR-21 • United States Bureau of Reclamation (USBR) • Daily Methods (only daily analyses) • Max Total Inches Per Day • Fraction of Total Precipitation • SCS NEH4

  48. Effective Precipitation Methods • SCS TR-21 (Monthly) • Re = (0.7091*Rt0.82416 – 0.11556)*(10(0.02426*cu))*F • Re - monthly effective precipitation • Rt- total monthly precipitation • cu - monthly consumptive use (potential ET) • F - function of D • D - the net depth of application • F = 0.531747 + 0.295164(D) – 0.057697(D2) + 0.003804(D3) • It should be noted that Re cannot exceed monthly precipitation or consumptive use. When this happens, Re is set equal to the lesser of the two.

  49. Effective Precipitation Methods • USBR (Monthly) • Linearly related to precipitation. • Re = 0.95 * RtRt<1.0 inch • Re = 0.90 * (Rt – 1.0) + 0.95 1.0<Rt<2.0 inches • Re = 0.82 * (Rt – 2.0) + 1.85 2.0<Rt<3.0 inches • Re = 0.65 * (Rt – 3.0) + 2.67 3.0<Rt<4.0 inches • Re = 0.45 * (Rt – 4.0) + 3.32 4.0<Rt<5.0 inches • Re = 0.25 * (Rt – 5.0) + 3.77 5.0<Rt<6.0 inches • Re = 0.05 * (Rt – 6.0) + 4.02 Rt>6.0 inches

  50. Effective Precipitation Methods • Max Total Inches Per Day • User-specified maximum effective precipitation in inches per day. • Re = Rt if Rt is less than or equal to the user- specified maximum effective rainfall, otherwise: • Re = User supplied maximum value.