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<br />001933 <br /> <br />TABLE OF CONTENTS <br /> <br />LIST OF APPENDiCES......................................................................',.....,......................,........ V <br /> <br />LIST OF T ABLES.................,.........................................................................,......................... VI <br /> <br />LIST OF FIGURES .................................................................................................................. VII <br /> <br />CHAPTER 1 - OVERVIEW .............................................,...........................................................1 <br /> <br />San Juan RIP Background ...,.....,.....,..,..,.....,...........,..........,........,.....,.......,.....,................1 <br /> <br />Overview of Hydrology Modeling ....,.....,....",........,..,....".....,.....",..,.."....,.,........"..,'.......,,1 <br />Hydrologic Simulation Analysis. ,...."..,.. .........,....,... ,..............,.,..'.."........'.....,..,....... 1 <br />Computer Modeling tools........................., ,.......,.."....",...."............,...."...,....,..,',..... 1 <br />Natural flows and Historic Depletions ,............,............,.......,..,.....,..,.............,..,......,2 <br />Model Validation and Calibration...........,...."......."..,..,..,......",....,.."..,...."...."..,......2 <br /> <br />Operating Rules,...,..,..,..",............"..,.. ..,....",..."...,........,.....",..,..,.....".,..,.,..",..,....2 <br /> <br />Overview of Hydrology Modeling Documentation ...............,....................,......................,..3 <br /> <br />Two Documents.,......"",..,.. ,.. ,.... ,....'".... ,........,..',.. ,..,..,..,..,..'"..,.."".."",..', ,.."...",3 <br />Contents of This Document.....,.................." .................."..""...,..,...",..,..",....",."..,3 <br />Natural Flow and Historic Depletion Analysis ....,..,.............,............................3 <br />Computer Based Modeling Tools ,.........,......,....................,..,..,.........,............,3 <br />Model Input Data and Operating Rules .................,................,....,....,..............3 <br />Model Calibration and Verification..,.."......."....".."..,...."""..",....,..."..,...,.."..3 <br />Simulation Scenarios and Model Runs,....,......................,..,........,...................3 <br />Analysis of Model Output ...."....,.....""...".."..,...."...,..".....".....,..,..,',......,...,..3 <br />Model Limitations and Recommendations..........,.."...""...."....,........"...,.."..,,3 <br />States' Qualifications and Objections ............,............................,..,....,......,....,3 <br /> <br />CHAPTER 2 - NATURAL FLOW AND HISTORIC DEPLETION ANALYSIS .............................4 <br /> <br />USGS Stream Gages in the San Juan River Basin..,.........................,............................,..4 <br /> <br />Historic Depletions."......,..,.,....,.."",......"",.... ,..........,..."..,."...""..".,.....,......,....,",.....,. ,1 0 <br />Irrigation Depletions .... ,...............,......",......., ,.......... '.....',..,...'""......,.."""",..."',.. 10 <br />Consumptive Irrigation Requirement (CIR) Methodology ..............................10 <br /> <br />Climate Data"",......""..,....,..,..,..,............. ,.....,...,.......""...".... ,..",....,..,.,..... 13 <br />Crop Growing Seasons ..,.........................,....,..........,..,...,.........,..,..".."...,..,'14 <br />Irrigated Acres and Cropping Patterns .....,....,.....................................,.........18 <br />Distribution of County Crop Data...............,....,............,........,........,........,......19 <br /> <br />Shortages....,........., ,...................'..",..",..'..,...,..".. ,.. ,..,..'"",..,........,.,....",.. .20 <br />Sprinkler Evaporation ",," ,."""." ,.. ,..... ,..." ,. "."... ,.... ". ,.., '" ,."",."",., '...'"",. ,20 <br />Proportioning Unit Irrigation Depletions to Gauging Stations ..,........,........,....20 <br /> <br />Ground Water Storage.",.......".. ,....".,....""",..,...,..,.....".....",...,"',.,..."..,.., ,23 <br /> <br />DRAFT - SJRIP Hydrology Model Documentation <br />June 18. 1999 <br />