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FLOOD03824
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Last modified
1/25/2010 6:44:27 PM
Creation date
10/5/2006 12:05:34 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Stream Name
South Platte, Arkansas, Colorado
Basin
Statewide
Title
Annual Snowmelt and Rainfall Peak Flow Data on Selected Foothills Region Streams, South Platte River, Arkansas River, and Colorado River Basins Colorado
Date
1/1/1982
Prepared By
USGS
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />Approach <br /> <br />McCain and Ebling (1979) outlined a comprehensive plan for the collection and <br />analysis of flood data for selected streams in the foothills regions of Colorado. <br />Based on this earl ier work, the study of foothills region flood hydrology is being <br />conducted. In the first phase of the study, a peak-flow data base was established <br />and is presented in this report. Flow characteristics were compiled for 69 streams <br />in the South Platte River, the Arkansas River, and the Colorado River basins. The <br />major river basins of Colorado are shown in figure 1. Gage-height charts, weather <br />records, and indirect discharge measurements were examined, and peak-flow events <br />were identified as originating from either snowmelt runoff or rainfall runoff. <br /> <br />Personnel from the Colorado District analyzed rainfall-runoff and snowmelt- <br />runoff data bases and also used other techniques of investigations. Topics includ- <br />ed in these analyses and techniques of investigations were: (1) Flood-frequency <br />analysis of rainfall-runoff and snowmelt-runoff data; (2) Methods for at-a-site <br />integration of snowmelt and rainfall flood-frequency curves; (3) Coordination of <br />mixed-population flood-frequency analysis with investigations of geomorphic, <br />stratigraphic, botanic, and paleohydraulic techniques; and (4) Definition of areas <br />dominated by either snowmelt-runoff or rainfall-runoff peak flows. This study will <br />provide the means to identify the needs and amount of additional data collection <br />for foothills streams in Colorado. <br /> <br />Although foothill-type streams occur adjacent to all mountainous areas in <br />Colorado, severe floods produced by rainfall appear to be extremely rare for <br />streams in the basins of the North Platte River and the Rio Grande (McCain and <br />Ebling, 1979). For this reason, streams in these two basins were not included in <br />the study. The data presented in this report include snowmelt- and rainfall- <br />produced peak flows from 27 streamflow-gaging stations in the South Platte River <br />basin, 13 in the Arkansas River basin, and 29 in the Colorado River basin, shown <br />in figures 2, 3, and 4, respectively. <br /> <br />Acknowledgments <br /> <br />The authors are grateful to Glenn Brees, Colorado Department of Natural Re- <br />sources, Division of Water Resources, Office of the State Engineer, for providing <br />records of State-operated streamflow-gaging stations. Assistance in data compila- <br />tion and interpretation was provided by Eugene J. Van Camp and Will iam P. Stanton <br />I I I, Colorado Department of Natural Resources, Colorado Water Conservation Board, <br />and Richard A. Herbert, U.S. Bureau of Land Management. <br /> <br />STATION SELECTION <br /> <br />Peak-flow data presented in this study were collected at streamflow-gaging <br />stations in Colorado by the U.S. Geological Survey and cooperating agencies. The <br />following criteria were established for the selection of the streamflow-gaging <br />stations to be studied. <br /> <br />2 <br />
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