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Bryce A Mihalevich, PhD (Former Employee)

Science and Products

Lake Powell and research boat

Lake Powell Research

Lake Powell is a large arid reservoir that represents about 70% of the water storage capacity for the Upper Colorado River Basin. It is the second largest reservoir in the United States by capacity (second only to Lake Mead). Lake Powell is an oligotrophic reservoir, which means that nutrient concentrations and algal production are generally low. This often results in very clear-water conditions...
By
Ecosystems Mission Area, Land Management Research Program, Southwest Biological Science Center
Lake Powell Research

Lake Powell Research

Lake Powell is a large arid reservoir that represents about 70% of the water storage capacity for the Upper Colorado River Basin. It is the second largest reservoir in the United States by capacity (second only to Lake Mead). Lake Powell is an oligotrophic reservoir, which means that nutrient concentrations and algal production are generally low. This often results in very clear-water conditions...
Learn More

Declining reservoir elevations following a two-decade drought increase water temperatures and non-native fish passage facilitating a downstream invasion Declining reservoir elevations following a two-decade drought increase water temperatures and non-native fish passage facilitating a downstream invasion

River ecosystems are threatened by interactions among river regulation, non-native species, and climate change. Water use has exceeded supply in USA’s Colorado River basin draining its two largest storage reservoirs (Lake Powell and Lake Mead). In 2022, Lake Powell began releasing water from its lower epilimnion into the Grand Canyon segment of the Colorado River, which (1) increased...
Authors
Drew Elliot Eppehimer, Charles B. Yackulic, Lindsey Ann Bruckerhoff, Jianghao Wang, Kirk L. Young, Kevin R. Bestgen, Bryce Anthony Mihalevich, John C. Schmidt
By
Ecosystems Mission Area, Cooperative Research Units, Southwest Biological Science Center

Modeling the impacts of Glen Canyon Dam operations on Colorado River resources Modeling the impacts of Glen Canyon Dam operations on Colorado River resources

At the time of this report, the Bureau of Reclamation (Reclamation) is writing two supplemental Environmental Impact Statements (sEIS ) and a new Environmental Impact Statement (EIS) that will analyze the effects of changing water flow out of Glen Canyon Dam (GCD) (U.S. Department of Interior, 2024). These actions have the potential to affect downstream resources, including threatened...
Authors
Charles Yackulic, Lucas Bair, Drew Elliot Eppehimer, Gerard Lewis Salter, Bridget Deemer, Bradley J. Butterfield, Alan Kasprak, Joshua Caster, Helen C. Fairley, Paul E. Grams, Bryce Anthony Mihalevich, Emily C. Palmquist, Joel B. Sankey
By
Ecosystems Mission Area, Southwest Biological Science Center

U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program

This proceedings is prepared for the USBR and Glen Canyon Dam Adaptive Management Program (GCDAMP) to account for work conducted and products delivered in FY 2023 by SBSC's Grand Canyon Monitoring and Research Center (GCMRC) and to inform the Technical Work Group of science conducted by GCMRC and its cooperators in support of the GCDAMP. It includes a summary of accomplishments...
Authors
Andrew Alan Schultz, Gregory Mark Anderson, David J. Topping, Ronald E. Griffiths, David J. Dean, Paul E. Grams, Keith Kohl, Gerard Lewis Salter, Matthew A. Kaplinski, Katherine Chapman, Erich R. Mueller, Emily C. Palmquist, Bradley J. Butterfield, Joel B. Sankey, Bridget Deemer, Charles Yackulic, Lindsay Erika Hansen, Drew Elliot Eppehimer, Theodore Kennedy, Anya Metcalfe, Jeffrey Muehlbauer, Morgan Ford, Michael Dodrill, Maria C. Dzul, Pilar Rinker, Michael J. Pillow, David Ward, Josh Korman, Molly A.H. Webb, James A. Crossman, Eric J Frye, David L. Rogowski, Kimberley Dibble, Lucas Bair, Joshua Abbott, Thomas M. Gushue, Erica Paige Byerley, Joseph E Thomas, Thomas A. Sabol, Bryce Anthony Mihalevich
By
Ecosystems Mission Area, Southwest Biological Science Center

Appendix 1: Lake Powell water quality monitoring Appendix 1: Lake Powell water quality monitoring

No abstract available.
Authors
Bridget Deemer, Nicholas Voichick, Thomas A. Sabol, Caitlin M. Andrews, Bryce Anthony Mihalevich
By
Ecosystems Mission Area, Southwest Biological Science Center

Water storage decisions and consumptive use may constrain ecosystem management under severe sustained drought Water storage decisions and consumptive use may constrain ecosystem management under severe sustained drought

Drought has impacted the Colorado River basin for the past 20 years and is predicted to continue. In response, decisions about how much water should be stored in large reservoirs and how much water can be consumptively used will be necessary. These decisions have the potential to limit riverine ecosystem management options through the effect water-supply decisions have on reservoir...
Authors
Lindsey Ann Bruckerhoff, Kevin Wheeler, Kimberly L. Dibble, B.A. Mihalevich, B.T. Nielson, J. Wang, Charles Yackulic, J.C. Schmidt
By
Ecosystems Mission Area, Cooperative Research Units, Southwest Biological Science Center

Water temperature controls for regulated canyon-bound rivers Water temperature controls for regulated canyon-bound rivers

Many canyon‐bound rivers have been dammed and downstream flow and water temperatures modified. Climate change is expected to cause lower storage in reservoirs and warmer release temperatures, which may further alter downstream flow and thermal regimes. To anticipate potential future changes, we first need to understand the dominant heat transfer mechanisms in canyon‐bound river systems...
Authors
Bryce A. Mihalevich, Bethany Neilson, Caleb A. Buahin, Charles Yackulic, John C. Schmidt
By
Ecosystems Mission Area, Southwest Biological Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

Science and Products

Lake Powell and research boat

Lake Powell Research

Lake Powell is a large arid reservoir that represents about 70% of the water storage capacity for the Upper Colorado River Basin. It is the second largest reservoir in the United States by capacity (second only to Lake Mead). Lake Powell is an oligotrophic reservoir, which means that nutrient concentrations and algal production are generally low. This often results in very clear-water conditions...
By
Ecosystems Mission Area, Land Management Research Program, Southwest Biological Science Center
Lake Powell Research

Lake Powell Research

Lake Powell is a large arid reservoir that represents about 70% of the water storage capacity for the Upper Colorado River Basin. It is the second largest reservoir in the United States by capacity (second only to Lake Mead). Lake Powell is an oligotrophic reservoir, which means that nutrient concentrations and algal production are generally low. This often results in very clear-water conditions...
Learn More

Declining reservoir elevations following a two-decade drought increase water temperatures and non-native fish passage facilitating a downstream invasion Declining reservoir elevations following a two-decade drought increase water temperatures and non-native fish passage facilitating a downstream invasion

River ecosystems are threatened by interactions among river regulation, non-native species, and climate change. Water use has exceeded supply in USA’s Colorado River basin draining its two largest storage reservoirs (Lake Powell and Lake Mead). In 2022, Lake Powell began releasing water from its lower epilimnion into the Grand Canyon segment of the Colorado River, which (1) increased...
Authors
Drew Elliot Eppehimer, Charles B. Yackulic, Lindsey Ann Bruckerhoff, Jianghao Wang, Kirk L. Young, Kevin R. Bestgen, Bryce Anthony Mihalevich, John C. Schmidt
By
Ecosystems Mission Area, Cooperative Research Units, Southwest Biological Science Center

Modeling the impacts of Glen Canyon Dam operations on Colorado River resources Modeling the impacts of Glen Canyon Dam operations on Colorado River resources

At the time of this report, the Bureau of Reclamation (Reclamation) is writing two supplemental Environmental Impact Statements (sEIS ) and a new Environmental Impact Statement (EIS) that will analyze the effects of changing water flow out of Glen Canyon Dam (GCD) (U.S. Department of Interior, 2024). These actions have the potential to affect downstream resources, including threatened...
Authors
Charles Yackulic, Lucas Bair, Drew Elliot Eppehimer, Gerard Lewis Salter, Bridget Deemer, Bradley J. Butterfield, Alan Kasprak, Joshua Caster, Helen C. Fairley, Paul E. Grams, Bryce Anthony Mihalevich, Emily C. Palmquist, Joel B. Sankey
By
Ecosystems Mission Area, Southwest Biological Science Center

U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program U.S. Geological Survey Grand Canyon Monitoring and Research Center: Proceedings of the fiscal year 2023 annual reporting meeting to the Glen Canyon Dam Adaptive Management Program

This proceedings is prepared for the USBR and Glen Canyon Dam Adaptive Management Program (GCDAMP) to account for work conducted and products delivered in FY 2023 by SBSC's Grand Canyon Monitoring and Research Center (GCMRC) and to inform the Technical Work Group of science conducted by GCMRC and its cooperators in support of the GCDAMP. It includes a summary of accomplishments...
Authors
Andrew Alan Schultz, Gregory Mark Anderson, David J. Topping, Ronald E. Griffiths, David J. Dean, Paul E. Grams, Keith Kohl, Gerard Lewis Salter, Matthew A. Kaplinski, Katherine Chapman, Erich R. Mueller, Emily C. Palmquist, Bradley J. Butterfield, Joel B. Sankey, Bridget Deemer, Charles Yackulic, Lindsay Erika Hansen, Drew Elliot Eppehimer, Theodore Kennedy, Anya Metcalfe, Jeffrey Muehlbauer, Morgan Ford, Michael Dodrill, Maria C. Dzul, Pilar Rinker, Michael J. Pillow, David Ward, Josh Korman, Molly A.H. Webb, James A. Crossman, Eric J Frye, David L. Rogowski, Kimberley Dibble, Lucas Bair, Joshua Abbott, Thomas M. Gushue, Erica Paige Byerley, Joseph E Thomas, Thomas A. Sabol, Bryce Anthony Mihalevich
By
Ecosystems Mission Area, Southwest Biological Science Center

Appendix 1: Lake Powell water quality monitoring Appendix 1: Lake Powell water quality monitoring

No abstract available.
Authors
Bridget Deemer, Nicholas Voichick, Thomas A. Sabol, Caitlin M. Andrews, Bryce Anthony Mihalevich
By
Ecosystems Mission Area, Southwest Biological Science Center

Water storage decisions and consumptive use may constrain ecosystem management under severe sustained drought Water storage decisions and consumptive use may constrain ecosystem management under severe sustained drought

Drought has impacted the Colorado River basin for the past 20 years and is predicted to continue. In response, decisions about how much water should be stored in large reservoirs and how much water can be consumptively used will be necessary. These decisions have the potential to limit riverine ecosystem management options through the effect water-supply decisions have on reservoir...
Authors
Lindsey Ann Bruckerhoff, Kevin Wheeler, Kimberly L. Dibble, B.A. Mihalevich, B.T. Nielson, J. Wang, Charles Yackulic, J.C. Schmidt
By
Ecosystems Mission Area, Cooperative Research Units, Southwest Biological Science Center

Water temperature controls for regulated canyon-bound rivers Water temperature controls for regulated canyon-bound rivers

Many canyon‐bound rivers have been dammed and downstream flow and water temperatures modified. Climate change is expected to cause lower storage in reservoirs and warmer release temperatures, which may further alter downstream flow and thermal regimes. To anticipate potential future changes, we first need to understand the dominant heat transfer mechanisms in canyon‐bound river systems...
Authors
Bryce A. Mihalevich, Bethany Neilson, Caleb A. Buahin, Charles Yackulic, John C. Schmidt
By
Ecosystems Mission Area, Southwest Biological Science Center

Non-USGS Publications**

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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