WSP05420

• File Number: 8407.500
• Description: Platte River Basin - River Basin General Publications - Missouri River
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1966
• Author: Missouri Basin IAC
• Title: Missouri River Basin Comprehensive Framework Study - Streamflow Characteristics - Platte-Niobrara Basins - For Selected Stations through 1963
• Water Supply Pro - Doc Type: Data

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4 STREAMFLOW CHARACTERISTICS

Selection

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STREAMFLOW RECORDS

The streamflow records forming the basis for the data presented
in this series of reports were selected initially by representatives
on the Hydrology Work Group from the Corps of Engineers, Public Health
Service, Bureau of Reclamation, Soil Conservation Service, and Geologi-
cal Survey. The stations selected by this group were then reviewed by
representatives of the principal water-resources agency of each basin
State who recommended addition or deletion of specific stations to
further refine the network. Each agency's station selection or review
was largely in light of the program responsibility of that agency; thus,
a number of stations in the network may be redundant to the particular
needs of another agency. Selection was based, generally, on obtaining
an adequate coverage of representative streamflow stations throughout
the basin giving considerable weight to length of record and freedom from,
or specific knowledge of, regulation or diversions.

Data for about 550 streamflow stations are presented, of which 60
lie outside the Missouri basin. In comparison, records have been published
by the Geological Survey for nearly 1800 gaging stations during the more
than 80 years of streamgaging in the Missouri River basin. Gaging sta-
tions records from areas adjacent to the Missouri River basin were
selected for the purpose of better defining the regional patterns of
streamflow along the periphery of the basin.

Each station record is assigned an index number in downstream order.
This number is the same as that used in the regular series of Geological
Survey reports and appears by each station name.

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Periods of Record

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Records through September 30, 1963 (or September 30 of last year of
record, if discontinued prior to 1963) were used in processing flow-dura-
tion and high-flow data. Low-flow sequences were processed on basis of
climatic years, ending March 31. The years are shown on the tabulation
sheets.

Records for several stations were processed in two or more separate
periods in cases where abrupt changes occurred in the flow regimen, such
as those resulting from dam construction upstream. In such cases, the
currently-used index number is used for the most recent period, adjusted by
.01 for each previous period of differing regulation.

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A very few of the stations chosen for'this report were discontinued
at some time in the past as progressive changes in the channel made the
site untenable and the station was moved to a better location with equiva-
lent streamflow. In such cases, the two periods of record are considered
continuous and are processed as one record under the name and index number
of the replacement site.

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