WSP05674

• File Number: 8200.760
• Description: Yampa River General
• State: CO
• Basin: Yampa/White
• Water Division: 6
• Date: 3/1/1978
• Author: USGS
• Title: Analysis of Waste-Load Assimilative Capacity of the Yampa River - Steamboat Springs to Hayden - Routt County - Colorado - March 1978
• Water Supply Pro - Doc Type: Report/Study

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CONTENTS

Metric conversion factors.
Abstract . .
Introduction . . . . .
Purpose and scope
Acknowledgments .
Previous investigations
Description of study reach .
Description of water-quality models used for analysis.
U.S. Geological Survey model.
Pioneer-I model . . . . . .
Data used for model calibration. .
Data-collection program . . .
Stream-reach and diel variations.
Data-reduction techniques . . . .
Calibration results. . . . . . . . . .
Factors incorporated into model simulations.
Existing stream-reach classification. .
Effluent standards of proposed regional wastewater-treatment plant.
Flow augmentation of proposed Yamcolo Reservoir
Population projections for Steamboat Springs. . . .
Model simulations. . . . . . . . . . . . . . . . . . .. '.
Effluents from existing wastewater-treatment plants and 7-day,
10-year streamflow. . . . . . . . . . . . . . . . . . .
Proposed regional wastewater-treatment plant with 1978 standards
for effluent. . . . . . . . . . . . . . . . . . . . . . . . . .
Proposed regional wastewater-treatment plant with 1985 standards
for effluent. . . . . . . . . .... . . . . . . .
Ammonia-nitrogen concentrations for varying conditions and 1978
standards for effluent.
Stream biological conditions
Summary. .
References . . . . . . . . .

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ILLUSTRATIONS

Figure 1. Map showing location and areal extent of the Yampa River
basin and location of study reach . . . . . . 3
2-5. Graphs showing:
2. Daily-mean discharges, Yampa River at Steamboat
Springs, 1975 water year. . . . . . . . . . 5
3. Daily-mean discharges, Yampa River downstream from
diversion near Hayden, 1975 water year. . . 6
4. Annual-mean and mean-annual discharges, Yampa River at
Steamboat Springs (1905-06, 1910-77). 7
5. Mean-monthly discharges, Yampa River at Steamboat
Springs (1905-06, 1910-77). . . . . . . . . . . 8

III