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Case Study – Recap Summary and Tips

Case Study – Recap Summary and Tips. DWR review of HCU analyses for changes of water rights. Applications to water court. Applications for substitute water supply plans. Change should not result in expansion of use or injury to WR. Recommend use of StateCU.

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Case Study – Recap Summary and Tips

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  1. Case Study – RecapSummary and Tips • DWR review of HCU analyses for changes of water rights. • Applications to water court. • Applications for substitute water supply plans. • Change should not result in expansion of use or injury to WR.

  2. Recommend use of StateCU. • Free download available at the CDSS website at: • http://cdss.state.co.us/software/Pages/StateCU.aspx • Quick Start and TSTool Manuals also available at this site. Case Study – RecapSummary and Tips

  3. Recommended: • Quantification of HCU should be based on a year-by year analysis that uses a monthly time step. • Compare irrigation deliveries to irrigation water requirements and use smaller of the two values. Case Study – RecapSummary and Tips

  4. Don’t: • Fill missing data in diversion records with average values. • Determine HCU by comparing long-term average diversions with long-term average crop irrigation requirements. Case Study – RecapSummary and Tips

  5. Don’t: • Multiply diversion records by an irrigation efficiency to calculate HCU. • Assume full water supply means the irrigation water requirement of crop represents the HCU. Case Study – RecapSummary and Tips

  6. Final Tip: • Use caution when proposing to use a calibrated crop coefficient in an area outside of where it was developed. Transfer of crop coefficients should be done conservatively. Case Study – RecapSummary and Tips

  7. Questions?

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