Streamflow gain/loss in the Republican River Basin, Nebraska, July 1975

This data set was created to archive the calculated stream flow gains and
losses of tributary streams to the Republican River in Dundy and Chase
Counties, Nebraska, in July 1975, and make the data available for use with
geographic information systems (GIS).

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 Dundy and Chase Counties, Nebraska during July 14 to 18,
1975 (U.S. Geological Survey, 1976). 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 55 sites. 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.