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

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
March 1989, 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 the
Republican River and tributaries in Nebraska during March 21 to 22, 1989 (USGS,
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 were also 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
hydrology data set without reach numbers were omitted.