Streamflow gain/loss in the Republican River Basin, Nebraska, October 1980

This arc and point data set contains streamflow-measurement sites and
reaches indicating streamflow gain or loss under base-flow conditions
along the Republican River and tributaries in Nebraska during October
20 to 21, 1980 (U.S. Geological Survey, 1982). The streamflow 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 118 sites. The measurements were made on the main stem of the Republican
River and all flowing tributaries that enter the Republican River between
Harlan County Reservoir and the Republican River near Hardy, Nebraska gaging
station in part of the Republican River Basin, 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.

Streamflow gain or loss for each stream reach was calculated by
subtracting the streamflow 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 streamflow 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 streamflow-measurement site. Each set of stream segments between
measurement sites was assigned a unique reach number.