Upper Deschutes River Basin Study Technical Memorandum Analysis of Regulated River Flow in the Upper Deschutes Basin using Varying Instream and Out-of-Stream Conditions U.S. Department of the Interior Bureau of Reclamation Pacific Northwest Region December 2018 Mission Statements U.S. Department of the Interior PROTECTING AMERICA’S GREAT OUTDOORS AND POWERING OUR FUTURE The U.S. Department of the Interior protects America’s natural resources and heritage, honors our cultures and tribal communities, and supplies the energy to power our future. Bureau of Reclamation The mission of the Bureau of Reclamation is to manage, develop, and protect water and related resources in an environmentally and economically sound manner in the interest of the American public. CONTENTS 1. Introduction ....................................................................................................................... 1 1.1. Goals of Study ............................................................................................................. 1 1.2. Water Resources Modeling Process ............................................................................ 1 2. Reference RiverWare Model ............................................................................................. 3 2.1. Irrigation Demand Pattern ............................................................................................ 8 2.2. Upper Deschutes River Operation ..............................................................................10 2.2.1. Crane Prairie ..................................................................................................11 2.2.2. Wickiup ...........................................................................................................11 2.2.3. Crescent .........................................................................................................12 2.3. Crooked River Operation ............................................................................................12 3. Informational Flow Scenarios .........................................................................................13 3.1. Flow Scenario Definition .............................................................................................13 3.2. Model Results .............................................................................................................14 3.2.1. Informational Flow Scenario 1 Model Results .................................................15 3.2.2. Informational Flow Scenarios 2a, 2b, and 3 Model Results .............................26 4. Water Management Scenarios ........................................................................................37 4.1. Water Management Scenario Model Results ..............................................................43 5. Stream Temperature Analysis .........................................................................................54 6. Redband Trout Suitable Habitat Analysis ......................................................................59 7. Summary ..........................................................................................................................61 8. Literature Cited ................................................................................................................62 Appendix A: Graphics Describing Flow Scenarios 2a, 2b, and 3 List of Figures Figure 1: Schematic of modeling process for the Basin Study. FS1, FS2a, FS2b, and FS3 represent different Informational Flow Scenarios. WM1, WM2, WM3, and WM4 represent different Water Management Scenarios. WICO is Wickiup outflow and DEBO is Deschutes River below Bend. ..................... 2 Figure 2. Deschutes River and Crooked River Basins. ........................................................... 4 Figure 3. Schematic of RiverWare representation of Upper Deschutes River. ........................ 6 Figure 4. Schematic of RiverWare representation of Crooked River. ...................................... 7 Figure 5. Daily diversion pattern that is repeated for every year in the model simulations. ............................................................................................................10 Figure 6. Summary hydrographs of simulated storage (top) and outflow (bottom) from Crane Prairie Reservoir where the dark blue line represents the December 2018 – Upper Deschutes River Basin Study, Water Resources Technical Memorandum i CONTENTS (CONTINUED) median and the shaded blue area represents the 20 to 80 percent exceedance. ...........................................................................................................16 Figure 7. Summary hydrographs of simulated storage (top) and outflow (bottom) from Wickiup Reservoir where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. ................17 Figure 8. Summary hydrographs of simulated storage (top) and outflow (bottom) from Crescent Lake where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .......................18 Figure 9. Summary hydrographs of simulated storage (top) and outflow (bottom) from Prineville Reservoir where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. ................19 Figure 10. Summary hydrographs of simulated storage (top) and outflow (bottom) from Ochoco Reservoir where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. ................20 Figure 11. Summary hydrograph of simulated flow at Deschutes River at Benham Falls where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .........................................21 Figure 12. Summary hydrograph of simulated flow at Deschutes River below Bend where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .................................................22 Figure 13. Summary hydrograph of simulated flow at Tumalo Creek below the TID diversion where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .............................23 Figure 14. Summary hydrograph of simulated flow in Whychus Creek at Sisters where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .................................................24 Figure 15. Summary hydrograph of simulated flow in Crooked River at Highway 126 where the dark blue line represents the median and the shaded blue area represents the 20 to 80 percent exceedance. .........................................25 Figure 16. Irrigation district shortages for Flow Scenario 1 under historical hydrologic conditions. .............................................................................................26 Figure 17. Each quadrant shows summary hydrographs of simulated storage (top) and outflow (bottom) from Crane Prairie Reservoir, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ..............................................................................................27 Figure 18. Each quadrant shows summary hydrographs of simulated storage (top) and outflow (bottom) from Wickiup Reservoir, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ..............................................................................................28 Figure 19. Each quadrant shows summary hydrographs of simulated storage (top) and outflow (bottom) from Crescent Reservoir, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ..............................................................................................29 ii December 2018 – Upper Deschutes River Basin Study, Water Resources Technical Memorandum CONTENTS (CONTINUED) Figure 20. Each quadrant shows summary hydrographs of simulated storage (top) and outflow (bottom) from Prineville Reservoir, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ..............................................................................................30 Figure 21. Each quadrant shows summary hydrographs of simulated storage (top) and outflow (bottom) from Ochoco Reservoir, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ..............................................................................................31 Figure 22. Each quadrant shows a summary hydrograph of simulated flow in the Deschutes River at Benham Falls, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ...........................................................................................................32 Figure 23. Each quadrant shows a summary hydrograph of simulated flow in Deschutes River below Bend, where the dark line represents the median and the shaded area represents the 20 to 80 percent exceedance. ...........................................................................................................33 Figure 24. Each quadrant shows a summary hydrograph of simulated flow in Tumalo Creek below TID, where the dark line represents the median and the shaded area represents