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Upper Colorado River Basin Water Resources Planning Model User's

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Upper Colorado River Basin Water Resources Planning Model User's Upper Colorado River Basin Water Resources Planning Model User’s Manual July 2016 Table of Contents TABLE OF FIGURES ............................................................................................................................. IV TABLE OF TABLES ............................................................................................................................... VI 1. INTRODUCTION ........................................................................................................................ 1‐1 1.1 BACKGROUND .................................................................................................................................. 1‐1 1.2 DEVELOPMENT OF THE UPPER COLORADO RIVER BASIN WATER RESOURCES PLANNING MODEL ...................... 1‐1 1.3 RESULTS .......................................................................................................................................... 1‐2 1.4 ACKNOWLEDGEMENTS ....................................................................................................................... 1‐3 2. WHAT’S IN THIS DOCUMENT .................................................................................................... 2‐1 2.1 SCOPE OF THIS MANUAL ..................................................................................................................... 2‐1 2.2 MANUAL CONTENTS .......................................................................................................................... 2‐1 2.3 WHAT’S IN OTHER CDSS DOCUMENTATION ........................................................................................... 2‐2 3. THE UPPER COLORADO RIVER BASIN ........................................................................................ 3‐1 3.1 PHYSICAL GEOGRAPHY ....................................................................................................................... 3‐1 3.2 HUMAN AND ECONOMIC FACTORS ....................................................................................................... 3‐3 3.3 WATER RESOURCES DEVELOPMENT ...................................................................................................... 3‐5 3.4 WATER RIGHTS ADMINISTRATION AND OPERATIONS ................................................................................ 3‐6 3.5 SECTION REFERENCES ......................................................................................................................... 3‐6 4. MODELING APPROACH ............................................................................................................. 4‐1 4.1 MODELING OBJECTIVES ...................................................................................................................... 4‐1 4.2 MODEL COVERAGE AND EXTENT ........................................................................................................... 4‐1 4.2.1. Network Diagram ................................................................................................................. 4‐1 4.2.2. Reservoirs ............................................................................................................................. 4‐4 4.2.3. Instream Flow Structures ..................................................................................................... 4‐6 4.3 MODELING PERIOD ........................................................................................................................... 4‐6 4.4 DATA FILLING ................................................................................................................................... 4‐6 4.4.1. Historical Data Extension for Major Structures ................................................................... 4‐7 4.4.2. Automated Time Series Filling ............................................................................................. 4‐8 4.4.3. Baseflow Filling .................................................................................................................... 4‐9 4.5 CONSUMPTIVE USE AND RETURN FLOW AMOUNTS ............................................................................... 4‐10 4.5.1. Variable Efficiency of Irrigation Use ................................................................................... 4‐10 4.5.2. Constant Efficiency for Other Uses and Special Cases ....................................................... 4‐12 4.6 RETURN FLOWS .............................................................................................................................. 4‐14 4.6.1. Return Flow Timing ............................................................................................................ 4‐14 4.6.2. Return Flow Locations ........................................................................................................ 4‐15 4.7 BASEFLOW ESTIMATION ................................................................................................................... 4‐17 4.7.1. Baseflow Computations at Gages ...................................................................................... 4‐18 Table of Contents I 4.7.2. Baseflow Filling .................................................................................................................. 4‐18 4.7.3. Distribution of Baseflow to Ungaged Points ...................................................................... 4‐18 4.8 CALIBRATION APPROACH .................................................................................................................. 4‐21 4.8.1. First Step Calibration .......................................................................................................... 4‐21 4.8.2. Second Step Calibration ..................................................................................................... 4‐21 4.8.3. Baseline Data Set ............................................................................................................... 4‐22 4.8.4. Calculated Irrigation Demand ............................................................................................ 4‐22 4.8.5. Municipal and Industrial Demand ...................................................................................... 4‐22 4.8.6. Transbasin and Transmountain Demands ......................................................................... 4‐23 4.8.7. Reservoirs ........................................................................................................................... 4‐23 5. BASELINE DATASET ................................................................................................................. 5‐24 5.1 RESPONSE FILE (*.RSP) .................................................................................................................... 5‐25 5.1.1. For Baseline Simulation ...................................................................................................... 5‐25 5.1.2. For Generating Baseflow ................................................................................................... 5‐27 5.2 CONTROL FILE (*.CTL) ...................................................................................................................... 5‐27 5.3 RIVER SYSTEM FILES ........................................................................................................................ 5‐27 5.3.1. River Network File (*.rin) ................................................................................................... 5‐27 5.3.2. River Station File (*.ris) ...................................................................................................... 5‐28 5.3.3. Baseflow Parameter File (*.rib) ......................................................................................... 5‐29 5.3.4. Historical Streamflow File (*.rih) ....................................................................................... 5‐31 5.3.5. Baseflow File (*.xbm) ......................................................................................................... 5‐33 5.4 DIVERSION FILES ............................................................................................................................. 5‐35 5.4.1. Direct Diversion Station File (*.dds) ................................................................................... 5‐35 5.4.2. Return Flow Delay Tables (*.dly) ........................................................................................ 5‐58 5.4.3. Historical Diversion File (*.ddh) ......................................................................................... 5‐60 5.4.4. Direct Diversion Demand File (*.ddm) ............................................................................... 5‐65 5.4.5. Direct Diversion Right File (*.ddr) ...................................................................................... 5‐70 5.5 IRRIGATION FILES ............................................................................................................................ 5‐80 5.5.1. StateCU Structure File (*.str) ............................................................................................. 5‐80 5.5.2. Irrigation Parameter Yearly (*.ipy) .................................................................................... 5‐80 5.5.3. Irrigation Water Requirement File (*.iwr) ......................................................................... 5‐81 5.6 RESERVOIR FILES ............................................................................................................................. 5‐81 5.6.1. Reservoir
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