Difference between revisions of "WATER QUALITY"

Forebay temperature 2000-2016 https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR4_Radtke.pdf

Forebay dissolved oxygen 2000-2016 https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR4_Radtke.pdf

WQ field parameters measured monthly at forebay and quarterly throughout reservoir

• Depth
• Temperature
• Dissolved Oxygen
• pH
• Conductivity / TDS
• ORP
• Turbidity
• Chl a
• Secchi Depth
• Meteorological Information

WQ samples sent for lab analysis

• Major ions
• pH
• Conductivity
• TDS, roe & soc
• TSS
• Alkalinity
• DOC
• OP
• TP
• NH3-N
• NO3+NO2-N
• TN
• Chl
• Phytoplankton / Zooplankton
• Metals (once per year, UT)

• GCMRC Annual Reports page
• Nutrients Page
• Temperature Page

• 2017 Water Quality PEP
• Final report of the 2001 Protocol Evaluation Panel for the Grand Canyon Monitoring and Research Center Integrated Water Quality Program (IWQP)

• Glen Canyon Dam Site: Hourly Averages
• Glen Canyon Dam near Page, AZ
• Colorado River at Lees Ferry
• Colorado River near river mile 30
• Colorado River above Little Colorado River near Desert View, AZ
• Colorado River near Grand Canyon, AZ
• Colorado River above National Canyon near Supai, AZ
• Colorado River above Diamond Creek near Peach Springs, AZ

2026

• Water Quality Update
• Dissolved oxygen dynamics in Glen Canyon Dam releases

2025

• Dragon Bravo Fire: Post Fire Updates
• Water Quality Update
• Glen Canyon Dam DO Augmentation
• Project A: Streamflow, Water Quality, and Sediment Transport and Budgeting in the Colorado River Ecosystem
• Water Quality in Lake Powell and Glen Canyon during Cool Mix Flows
• Water Quality Update
• Deemer et al., 2025, Low water levels interact with reservoir aging to increase the severity of summertime metalimnion dissolved oxygen minima in Lake Powell, desert Southwest USA: Inland Waters

2024

• Water Quality Update
• Improving the Lake Powell CEQUAL-W2 Water Quality Model
• Water Quality
• Water Quality Conditions in Lake Powell and below Glen Canyon Dam
• Dissolved Oxygen Dynamics in Lake Powell and Glen Canyon
• Improving the Lake Powell CE-QUAL-W2 Water Quality Model

2023

• Water Quality Conditions in Lake Powell and below Glen Canyon Dam
• Basin Hydrology, Operations and Water Quality
• Glen Canyon Dam Air Injection Testing September 2023
• Effects of Low Dissolved Oxygen and High Temperature on the Trout Fishery
• Basin Hydrology, Operations, and Water Quality
• Predicting Water Quality in Lake Powell: Updates and Improvements to the Existing Mechanistic Model
• Dissolved Oxygen Dynamics in Lake Powell and in the Glen Canyon Tailwater

2022

• Water Quality Synthesis Update
• Basin Hydrology, Operations and Water Quality
• Low Dissolved Oxygen in Releases: Current State-of-Practice - Technical Report No. ENV-2022-61
• Dissolved Oxygen State-of-Practice Study
• Basin Hydrology, Operations and Water Quality
• Basin Hydrology, Operations and Water Quality
• Basin Hydrology, Water Quality, and Operations
• Basin Hydrology, Operations, and Water Quality
• Lake Powell Water Quality March 2021-March 2022

2021

• Update on the Glen Canyon Dam/Lake Powell Dissolved Oxygen State-of-Practice Project

2020

• Metalimnion low dissolved oxygen events in Lake Powell and their transport downstream of Glen Canyon Dam
• Deemer et al., 2020, Calcite precipitation in Lake Powell reduces alkalinity and total salt loading to the Lower Colorado River Basin: Limnology and Oceanography
• Dissolved Oxygen Downstream of Glen Canyon Dam, 2019
• Lake Powell as a Regulator of Downstream Water Quality and Ecosystem Productivity

2018

• Lake Powell Water Quality Program PPT
• GCMRC Science Updates PPT
• Stone et al., 2018, Abiotic Controls of Invasive Nonnative Fishes in the Little Colorado River, Arizona. The American Midland Naturalist

2017

• Payn et al., 2017, A coupled metabolic-hydraulic model and calibration scheme for estimating of whole-river metabolism during dynamic flow conditions: Limnology and Oceanography: Methods, v.15, no.10, p. 847-866
• Bernhardt et al. 2017. The metabolic regimes of flowing waters: Limnology and Oceanography
• Water Quality in Lake Powell and Its Influence on the Colorado River Below Glen Canyon Dam PPT

2016

• Voichick et al. 2016. Water clarity of the Colorado River—Implications for food webs and fish communities: U.S. Geological Survey Fact Sheet 2016–3053, 4 p.
• Project 2: Streamflow, Water Quality, Sediment Transport, and Sand Budgets in the Colorado River Ecosystem

2015

• Historical Physical and Chemical Data for Water in Lake Powell and from Glen Canyon Dam Releases, Utah-Arizona, 1964–2013
• Water Quality in Lake Mead and Upstream Influences: Dissolved Oxygen during 2014
• Streamflow, Water Quality, and Sediment Transport in the Colorado River Ecosystem
• Glen Canyon Physical Environment Update – Water Quality, Tributary Influences & Channel Analyses & Flows

2014

• How the 2014 HFE affected water quality parameters such as dissolved oxygen (DO) and temperature below Glen Canyon Dam.

2012

• Integrated Quality-of-Water Monitoring
• Flow Temp Turbidity

2010

• Effects of Drought on Water Quality of Lake Powell and Glen Canyon Dam Releases
• Update on Water Quality and 2010 Sand Input

2009

• Grand Canyon Monitoring and Research Center (GCMRC) Update
• Water Quality and Sediment, 2008 High Flow Experiment, and Integrated Flow, Temperature, and Sediment Modeling PPT
• Final Report of the Protocol Evaluation Panel for the GCMRC Integrated Water Quality Program

2006

• Update on Water Quality of Lake Powell and Glen Canyon Dam Releases

2005

• Reclamation to continue experimental operations at Glen Canyon Dam; Efforts address low dissolved oxygen levels below dam

Rough operation of the turbines

Increases the oxygenation of water going through the power plant Is damaging to the turbines

• Reclamation to continue experimental operations at Glen Canyon Dam to increase dissolved oxygen (2005)

Oxygenation of the tailwater using the bypass tubes

The Basin States have maintained that according to Sec 602a of the Colorado River Basin Project Act (1968), the bypass tubes at Glen Canyon Dam can only be used to avoid anticipated spills from Lake Powell. The Basin States have agreed to bypass at Glen Canyon Dam for HFEs on the condition that it be done as part of an experiment and not a management action or operational decision. Costs associated with any release that bypasses the powerplant for reasons other than to avoid a spill or for experimentation relating to HFEs would have to be borne by the GCDAMP (see DOI determination for costs of the 2004 BHBF).

Adding power generation to the bypass tubes

Allows for drawing water from deeper in Lake Powell where colder and more oxygenated water may be present.

• Generation at Outlet Glen Canyon Dam Plan of Study CRSP Power Peaking Capacity (March 1981)

Other methods:

• Forebay diffusers
• Side stream super-saturation
• Aeration
• Turbine venting
• Surface water pumps (impellers)

(Mobley Engineering: Hydropower Enhancement Technologies)