Geoscience Reference
In-Depth Information
Table 26.4
A summary of monitoring activities for the Glen Canyon Dam Adaptive Management Program.
Resource
Focus
Geographic scope
Parameters
Frequency
Aquatic food base.
Total organic carbon
budget,
invertebrate
production.
Glen Canyon Dam
(GCD) to Pearce
Ferry.
Primary production,
tributary inputs,
biomass and density
of dominant taxa.
Quarterly.
Native and non-native
fish.
Evaluate survival and
recruitment.
GCD to Diamond
Creek, Little
Colorado River.
Population status,
trends, and
condition.
Three times annually.
Lees Ferry rainbow
trout.
Sustainable, high
quality angling.
Glen Canyon
tail-waters.
Population status,
trends, and
condition.
Seasonally.
Kanab ambersnail.
Snail and egg
abundance, habitat.
Vaseys Paradise.
Population status,
trends, habitat area.
Annually.
Riparian and spring
communities.
Discerning impacts of
dam operations on
vegetation.
GCD to Diamond
Creek.
Vegetation
communities,
species composition,
density, and
distribution.
Annual sampling with
5-year mapping
updates.
Lake Powell: quality of
water.
Lake Powell
water-quality
parameters.
Lake Powell.
Temperature, pH,
conductance,
dissolved oxygen.
Quarterly.
Colorado River: quality
of water.
Flow, temperature,
suspended
sediment, water
chemistry.
GCD to Diamond
Creek.
Variable.
Variable (15 minutes
to hourly).
Sediment
Sandbar area and
volume; channel
sediment volume,
and grain size.
45 long-term sandbars
and reaches.
Repeat topographic
and grain size
surveys.
Annual to every
5 years.
Recreational
experience.
Campsite area, quality,
and distribution.
45 long-term sandbars. Camp area.
Annually.
Hydropower
generation and
costs.
Kilowatts and costs.
GCD.
Hourly generation
capacity,
replacement market
values.
Hourly and daily.
Cultural resources.
Resource condition
and physical
stability.
Sample of sites in
Colorado River
ecosystem.
Erosion rates, surface
stability.
Biannually.
ecosystem is equivalent to Western scientific
knowledge, but their concerns and suggestions
receive little attention in the decision-making
process (Dongoske
et al
., 2010).
Collaboration among participants and the
development of mutually agreed outcomes in the
Program would be improved if suitable incentives
encouraged stakeholders to work towards common
goals; if a process for evaluating trade-offs among
conflicting or competing goals was developed and
used; if facilitation and mediation expertise was
incorporated throughout the Program; and if a
full-time executive director/coordinator provided
continuity of programme leadership from one
administration to the next (National Research
Council, 1999; US Institute for Environmental
Conflict Resolution, 2006; Adler, 2007; Walters,
2007; Susskind
et al
., 2010).
