Streamflow gain/loss in the Republican River Basin, Nebraska, March 1989

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 March 21 to 22,
1989 (Boohar and others, 1990). These measurements were made to obtain
data on ground-water/surface-water interaction. Flow was visually observed to
be zero, was measured, or was estimated at 136 sites. The measurements
were made on the main stem of the Republican River and all flowing tributaries
that enter the Republican River above Swanson Reservoir and parts of the
Frenchman, Red Willow, and Medicine Creek drainages in the Nebraska part of
the Republican River Basin. 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.