Streamflow gain/loss in the Republican River Basin, Nebraska, April to May 1980

This data set was created to archive the calculated stream flow gains and
losses of selected streams in part of the Republican River Basin, Nebraska, in
April and May 1980, and make the data available for use with geographic
information systems (GUS).

This arc and point data set contains stream flow-measurement sites and reaches
indicating stream flow gain or loss under base-flow conditions along Republican
River tributaries in Nebraska during April 28 to May 1, 1980 (U.S. Geological
Survey, 1981). The stream flow measurements were made to obtain data on
ground-water/surface-water interaction. Flow was observed visually to be zero,
was measured, or was estimated at 147 sites. The measurements were made on the
main stem of the Republican River and all flowing tributaries that enter the
Republican River between Muddy Creek in western Hitchcock County and Deer Creek
in western Furnas County, Nebraska. Tributaries were followed upstream until
the first road crossing where zero flow was encountered. For selected streams,
points of zero flow upstream of the first zero flow site also were checked.

Stream flow gain or loss for each stream reach was calculated by subtracting
the stream flow values measured at the upstream end of the reach and values for
contributing tributaries from the downstream value. The data obtained reflected
base-flow conditions suitable for estimating stream flow gains and losses for
stream reaches between sites.

This digital data set was created by manually splitting the lines from a
1:250,000 hydrography data set (Soenksen and others, 1999) at every stream flow
measurement site. Each set of stream segments between measurement sites was
assigned a unique reach number.

This digital data set was created by manually plotting locations of stream
flow measurements. These points were used to designate steam-reach segments to
calculate gain/loss per river mile.

Reach segments were created by manually splitting the lines from a 1:250,000
hydrography data set (Soenksen and others, 1999) at every location where the
streams were measured. Each stream-reach segment between stream flow
measurement sites was assigned a unique reach number. All other lines in the
hydrography data set without reach numbers were omitted.