7738 ‎(2)‎

• UCREFRP Catalog Number: 7738
• Author: Ruppert, J. B., R. T. Muth and T. P. Nesler
• Title: Predation on Fish Larvae by Adult Red Shiner, Yampa and Green Rivers, Colorado
• USFW Year: 1993
• USFW - Doc Type: The Southwestern Naturalist
• Copyright Material: NO

1
1
1
General Approach ................................................................................... 4-26
Single-Discipline Evaluations .....................................................................4-27
Multi-Disciplinary Evaluation .................................................................... 4-27
Site Selection Recommendations ................................................................. 4-29
CHAPTER 5 - Development of Basin Model

n

1

1

Modeling Objectives and Approach ...................................................................... 5-1
Review of Previous Basin Modeling ..................................................................... 5-1
The HYDROSS Model .............................................................................. 5-1
Hydrology and Demands Represented in the HYDROSS Model ........................... 5-2
Review of HYDROSS Modeling Assumptions ................................................. 5-2
Comparison of HYDROSS and Feasibility Study Depletion Assumptions ............... 5-3
Development of Basin Model .............................................................................. 5-4
Introduction to Network Modeling ............................................................... 5-5
Model Configuration ................................................................................ 5-5
Representation of Hydrology in the Basin Model .............................................5-10
Representation of Demands and Reservoirs .................................................... 5-15
Reservoir Operations ............................................................................... 5-24
Model Validation ....................................................................................5-26
CHAPTER 6 - Evaluation of Alternatives
Overview ...................................................................................................... 6-1
Evaluation Criteria .................................................................................. . 6-1
Use of the Basin Model ............................................................................ . 6-1
Definition of Alternatives ......................................................................... . 6-2
Scenario I - No Action (Baseline).
...................................................................... . 6-3
:
Key Assumptions of Scenario .................................................................... . 6-3
Results of Scenario I ............................................................................... . 6-6
Scenario II - Conversion of Juniper Rights Only ..................................................... . 6-8
Key Assumptions of Scenario ............................................... ...... . 6-8
Results of Scenario II ....................... .......................................... ............. 6-11
Scenario III - Enlargement of Elkhead Reservoir ..................................................... 6-14

.......................
Key Assumptions of Scenario ............................................. 6-14
Results of Scenario III ................ ..................................................... 6-16
Scenario IV - Enlargement of Elkhead and Stagecoach
Reservoirs .................................................................................... 6-20
Key Assumptions of the Scenario ................................................................ 6-20
Results of Scenario IV ............................................................................. 6-20
Scenario V - Elkhead Enlargement with
Williams Fork Project ...................................................................... 6-22
Key Assumptions of Scenario .................................................................... 6-22
Results of Scenario V .............................................................................. 6-25
Environmental Considerations ............................................................................ 6-29
Sport Fisheries ....................................................................................... 6-29
Flow Conditions in Occupied Habitat ........................................................... 6-35
Wetlands and Wildlife Impacts ................................................................... 6-37
Project development Cost ................................................................................. 6-38
General ................................................................................................ 6-38
iii