7075

• UCREFRP Catalog Number: 7075
• Author: Butler, M.
• Title: Minimum Streamflow Hydrographs and Sediment Transport in the Yampa River Canyon Reaches
• USFW Year: 1988.
• USFW - Doc Type: Draft.
• Copyright Material: NO

PURPOSE OF TOTAL SEDIMENT TRANSPORT BUDGET
A FORTRAN program was developed for the Deerlodge Park to Mathers Hole reach of
the Yampa River. The purposes of the program are to:
1) Extend the analysis preformed by Elliott, focusing on the seasonal movement
of sediment in the Deerlodge Park-Mathers Hole reach, in addition to the
Deerlodge Park area.
12) Investigate changes in total load transport instead of suspended load. Bed
load rating curves may also be substituted where appropriate.
3) To help in evaluating specific water development projects and their impacts
upon total sediment transport through the reach and to the Green River.
4) Develop mean monthly hydrographs to maintain sediment transport through the
Deerlodge Park - Mathers Hole reach, given mean monthly project flow data.
SUMMARY OF TOTAL SEDIMENT BUDGET PROCEDURE
This section summarizes the basic procedures used within the sediment budget
program; details on the individual components and assumptions are explained
more fully in the next sections.
1) The mean daily discharges at the Little Snake near Lily and the Yampa River
near Maybell stations are summed and equated to the mean daily discharge at
Deerlodge Park and Mathers Hole. This synthetic record for the 1941 to
1986 water years is deemed the 'historic' record at Deerlodge Park.
2) Using the mean daily discharge, the total sediment rating curves for
Deerlodge Park and Mathers Hole are used to estimate the tons of sediment
transported at both sites for each day. Rating curves for bed load size
fractions where also used in separate runs, but curves for comparable size
fractions were not readily available.
3) The difference between the Deerlodge Park and the Mathers Hole daily
sediment load in tons is determined, and represents a surplus or deficit
for the Deerlodge Park - Mathers Hole reach for that day.
4) The surplus/deficit in the reach is summed on a daily basis, and the
'running balance' reported at the end of each month and water year for the
1941- 1986 period. The ending balance of one month is used as the
beginning balance of the next month.