San Juan / Dolores River Basin Water Resources Planning Model User’s Manual October 2009 Table of Contents Table of Contents ................................................................................................................................. i 1. Introduction .......................................................................................................................... 1‐1 1.1 Background ...................................................................................................................... 1‐1 1.2 Development of the San Juan / Dolores River Basin Water Resources Planning Model 1‐1 1.3 Future Enhancements ...................................................................................................... 1‐3 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 San Juan / Dolores River Basin ....................................................................................... 3‐1 3.1 Physical Geography .......................................................................................................... 3‐1 3.2 Human and Economic Factors ......................................................................................... 3‐3 3.3 Water Resources Development ....................................................................................... 3‐4 3.4 Water Rights Administration and Operations ................................................................. 3‐4 3.5 Section 3 References ........................................................................................................ 3‐5 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. Diversion Structures ......................................................................................................... 4‐2 4.2.3. Reservoirs ......................................................................................................................... 4‐2 4.2.4. Instream Flow Structures ................................................................................................. 4‐4 4.3 Modeling Period ............................................................................................................... 4‐4 4.4 Data Filling ....................................................................................................................... 4‐4 4.4.1. Historical Data Extension for Major Structures ............................................................... 4‐5 4.4.2. Automated Time Series Filling ......................................................................................... 4‐6 4.4.3. Baseflow Filling ................................................................................................................ 4‐7 4.5 Consumptive Use and Return Flow Amounts .................................................................. 4‐8 4.5.1. Variable Efficiency of Irrigation Use................................................................................. 4‐8 4.5.2. Constant Efficiency for Other Uses and Special Cases................................................... 4‐11 4.6 Return Flows .................................................................................................................. 4‐12 4.6.1. Return Flow Timing ........................................................................................................ 4‐12 4.6.2. Return Flow Locations ................................................................................................... 4‐13 4.7 Baseflow Estimation ...................................................................................................... 4‐15 4.7.1. Baseflow Computations At Gages .................................................................................. 4‐15 4.7.2. Baseflow Filling .............................................................................................................. 4‐15 4.7.3. Distribution of Baseflow To Ungaged Points ................................................................. 4‐16 4.8 Calibration Approach ..................................................................................................... 4‐18 Table of Contents i 4.8.1. First Step Calibration ...................................................................................................... 4‐18 4.8.2. Second Step Calibration ................................................................................................. 4‐18 4.9 Baseline Data Set ........................................................................................................... 4‐19 4.9.1. Calculated Irrigation Demand ........................................................................................ 4‐19 4.9.2. Municipal And Industrial Demand ................................................................................. 4‐20 4.9.3. Transbasin Demand ....................................................................................................... 4‐20 4.9.4. Reservoirs ....................................................................................................................... 4‐20 5. Baseline Data Set .................................................................................................................. 5‐1 5.1 Response File (*.rsp) ........................................................................................................ 5‐2 5.1.1. For Baseline Simulation ................................................................................................... 5‐2 5.1.2. For Generating Baseflow ................................................................................................. 5‐4 5.2 Control File (*.ctl) ............................................................................................................. 5‐4 5.3 River System Files ............................................................................................................ 5‐4 5.3.1. River Network File (*.rin) ................................................................................................. 5‐4 5.3.2. River Station File (*.ris) .................................................................................................... 5‐5 5.3.3. Baseflow Parameter File (*.rib) ....................................................................................... 5‐6 5.3.4. Historical Streamflow File (*.rih) ..................................................................................... 5‐8 5.3.5. Baseflow File (*.xbm) ....................................................................................................... 5‐8 5.4 Diversion Files ................................................................................................................ 5‐12 5.4.1. Direct Diversion Station File (*.dds) .............................................................................. 5‐12 5.4.2. Return Flow Delay Tables (*.dly) ................................................................................... 5‐24 5.4.3. Historical Diversion File (*.ddh) ..................................................................................... 5‐26 5.4.4. Direct Diversion Demand File (*.ddm) ........................................................................... 5‐28 5.4.5. Direct Diversion Right File (*.ddr) .................................................................................. 5‐30 5.5 Irrigation Files ................................................................................................................ 5‐32 5.5.1. StateCU Structure File (*.str) ......................................................................................... 5‐32 5.5.2. Irrigation Parameter Yearly (*.ipy) ................................................................................ 5‐32 5.5.3. Irrigation Water Requirement File (*.iwr) ..................................................................... 5‐33 5.6 Reservoir Files ................................................................................................................ 5‐33 5.6.1. Reservoir Station File (*.res) .......................................................................................... 5‐33 5.6.2. Net Evaporation File (*.eva) .......................................................................................... 5‐38 5.6.3. End‐Of‐Month Content File (*.eom) .............................................................................. 5‐40 5.6.4. Reservoir Target File (*.tar) ..........................................................................................