7380

• UCREFRP Catalog Number: 7380
• Author: U.S. Bureau of Reclamation.
• Title: Glen Canyon Environmental Studies Phase II Technical Study Plan Outline
• USFW Year: 1989.
• USFW - Doc Type: Fiscal Year 1989, and Process for Completion of the Technical Studies.
• Copyright Material: NO

II. FISCAL YEAR 1989: MONITORING, DATA
ANALYSIS, AND INTEGRATED STUDY PLAN
(Note: This list is not arranged by order of impor-
tance. Study plans are listed by study area: integra-
tion, sediment (including cultural resources and
campsite studies), trout fishery, endangered fish, and
economics.]
A.
SEDIMENT STUDIES
1.
Flow routing model.
Major Premise: A reanalysis of the Unsteady Flow
Routing Model (original by Reclamation) is neces-
sary to refine the prediction of flow routing
through the Grand Canyon (the model does not yield
the required precision for estimates of magnitude
and timing of peaks and troughs of fluctuating
flows). The model will be verified with gaging
station data. A flow routing model is needed to
understand stage/ discharge relationships through-
out the study area, identify flow levels at
specific sites, and refine sediment transport
relationships. The analysis will use existing
gaging station data and some additional stage and
discharge data from the current study period and
study sites. Hydrology studies require a high
level of analysis (90%) in order to achieve the
1175% Comfort Level" for biological studies. The
model will be documented and will interface with
U.S. Geological Survey models.
Estimated Cost: $10,000
Responsible Parties: Bureau of Reclamation
(Reclamation), U.S. Geological Survey (USGS), Fish
& Wildlife Service (FWS).
Time to Complete: 6 months.
2.
Sediment transport program.
(a.) Step 1: Development of a sediment sampling
strategy.
Major Premise: An analysis of uncertainty in
estimation of sediment loads and sediment storage
changes is required in order to determine the most
cost effective scheme of sampling at gaging
stations and the best means for estimating storage
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