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Ami Riscassi

Ami Riscassi is a Hydrologist in the New England Water Science Center.

Professional Experience

  • Hydrologist, U.S. Geological Survey, New England Water Science Center, 2024 to Present

  • Research Scientist, University of Virginia, Environmental Sciences Department, 2014 to 2024

  • Post-Doctoral Research Associate, Oak Ridge National Lab, 2011 to 2014

  • Physical Scientist, U.S. Geological Survey, National Research Program, Water Resources Division, 2000 to 2006

  • Physical Science Technician, National Park Service, Yosemite National Park, 2000

Education and Certifications

  • Ph.D. Environmental Sciences, University of Virginia, 2011

  • M.S. Environmental Engineering, University of Virginia, 1999

  • B.S. Mathematics, Wake Forest University, 1996

Science and Products

A v-notch weir in a summer forest.
A Weir on Pope's Brook Tributary in Sleepers River Research Watershed
A Weir on Pope's Brook Tributary in Sleepers River Research Watershed
A v-notch weir in a summer forest.

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A v-notch weir sits behind a USGS streamgage on Pope Brook Tributary in the W-9 section of Sleepers River Research Watershed in Danville, Vermont.

By
Ecosystems Land Change Science Program, New England Water Science Center
A v-notch weir in a summer forest.

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A v-notch weir sits behind a USGS streamgage on Pope Brook Tributary in the W-9 section of Sleepers River Research Watershed in Danville, Vermont.

By
Ecosystems Land Change Science Program, New England Water Science Center
A man stands in the woods surrounded by white pipes sticking out of the ground.
Sleepers River Research Watershed Soil Data Collection
Sleepers River Research Watershed Soil Data Collection
A man stands in the woods surrounded by white pipes sticking out of the ground.

Sleepers River Research Watershed Soil Data Collection

Sleepers River Research Watershed Soil Data Collection

USGS Hydrologist Jamie Shanley collecting data from soil sensors in the woods of the Sleepers River Research Watershed. These data loggers collect water content and concentrations of oxygen and carbon dioxide. 

By
Ecosystems Land Change Science Program, New England Water Science Center
A man stands in the woods surrounded by white pipes sticking out of the ground.

Sleepers River Research Watershed Soil Data Collection

Sleepers River Research Watershed Soil Data Collection

USGS Hydrologist Jamie Shanley collecting data from soil sensors in the woods of the Sleepers River Research Watershed. These data loggers collect water content and concentrations of oxygen and carbon dioxide. 

By
Ecosystems Land Change Science Program, New England Water Science Center

Flow velocity, water temperature, and conductivity at selected locations in Shark River Slough, Everglades National Park, Florida; July 1999 - July 2003 Flow velocity, water temperature, and conductivity at selected locations in Shark River Slough, Everglades National Park, Florida; July 1999 - July 2003

Flow-velocity, water-temperature, and conductivity data were collected at five locations in Shark River Slough, Everglades National Park (ENP), Florida, from 1999 to 2003. The data were collected as part of the U.S. Geological Survey Priority Ecosystems Science Initiative in support of the Comprehensive Everglades Restoration Plan. This report contains digital files and graphical plots...
Authors
Raymond W. Schaffranek, Ami L. Riscassi

Flow velocity, water temperature, and conductivity in Shark River Slough, Everglades National Park, Florida: June 2002–July 2003 Flow velocity, water temperature, and conductivity in Shark River Slough, Everglades National Park, Florida: June 2002–July 2003

The data described in this report were collected in the U. S. Geological Survey (USGS) Priority Ecosystems Science project investigating "Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades." Data collected at five locations in Shark River Slough, Everglades National Park, during the 2002-2003 wet season are documented in the report. Methods used to process the data...
Authors
Ami L. Riscassi, Raymond W. Schaffranek

Development of coastal flow and transport models in support of everglades restoration Development of coastal flow and transport models in support of everglades restoration

No abstract available.
Authors
Christian D. Langevin, Eric D. Swain, John D. Wang, Melinda A. Wolfert, Raymond W. Schaffranek, Ami L. Riscassi

Flow Velocity, Water Temperature, and Conductivity in Shark River Slough, Everglades National Park, Florida: August 2001-June 2002 Flow Velocity, Water Temperature, and Conductivity in Shark River Slough, Everglades National Park, Florida: August 2001-June 2002

The data-collection effort described in this report is in support of the U.S. Geological Survey (USGS) Place-Based Studies project investigating 'Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades.' Data collected at four locations in Shark River Slough, Everglades National Park, during the 2001-2002 wet season are documented in the report and methods used to...
Authors
Ami L. Riscassi, Raymond W. Schaffranek

Flow-velocity, water-temperature and conductivity data collected in Shark River Slough, Everglades National Park, during 1999-2000 and 2000-2001 wet seasons Flow-velocity, water-temperature and conductivity data collected in Shark River Slough, Everglades National Park, during 1999-2000 and 2000-2001 wet seasons

A project within the U. S. Geological Survey Place- Based Studies Program is focused on investigation of ?Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades.? Data-collection efforts conducted within this project at three locations in Shark River Slough, Everglades National Park, during the 1999-2000 and 2000-2001 wet seasons are described in this report...
Authors
Ami L. Riscassi, R.W. Schaffranek
By
Caribbean-Florida Water Science Center (CFWSC)

Non-USGS Publications**

Factors influencing seasonal chemistry patterns in Virginia mountain streams. Riscassi, A.L., Scanlon, T.M., and J.N. Galloway. 2024. Biogeochemistry. DOI: 10.1007/s10533-024-01163-x.
Diel Mercury Concentration Variations in a Mercury-Impacted Stream. Brooks, S.C., Riscassi, A.L., Miller, C., Lowe, Yin, X. and Mehlhorn, T.L. 2022. Environmental Science: Processes & Impacts. DOI: 10.1039/D2EM00142.
Increasing Temperature and Flow Management Alter Mercury Dynamics in East Fork Poplar Creek. Brooks, S.C., Miller, C., Riscassi, A.L., Lowe, K. A., Dickson, J., and Schwartz, G. 2021. Hydrological Processes. DOI: 10.1002/hyp.14344.
Shenandoah Watershed Study-Virginia Trout Stream Sensitivity Study (SWAS-VTSSS): Stream water quality and hydrologic monitoring data for mid-Appalachian headwater streams. Riscassi, A.L., Scanlon, T.M., Maben, S.W., and Galloway, J.N. 2021. Hydrological Processes. DOI: 10.1002/hyp.14164.
Stream Discharge and Water Quality Data for East Fork Poplar Creek from 2012 to Present. Brooks, S.C., Riscassi, A.L., and Lowe, K. A. 2021. Hydrological Processes. DOI: 10.1002/hyp.14103
Observed changes in chronic and episodic acidification in Virginia mountain streams in response to the Clean Air Act and amendments. Scanlon, T. M., Riscassi, A. L., and Galloway, J.N. 2021. Atmospheric Environment. DOI: 10.1016/j.atmosenv.2021.118279.
The Impacts of Stream Acidification on Fish Assemblages: Assessing Three Decades of Recovery in Shenandoah National Park. Harmon, P., Riscassi, A.L., Scanlon, T.M., Galloway, J.N., Demarest, D., & May, C. 2021. Global Ecology and Conservation. DOI: 10.1016/j.gecco.2020.e01386.
Recent advances in understanding and measurement of mercury in the environment: Terrestrial Hg cycling. Bishop, K., Shanley, J.B., Riscassi, A., de Wit, H.A., Eklöf, K., Meng, B., Mitchell, C., Osterwalder, S., Schuster, P., Webster, J. & Zhu, W. 2020. Science of the Total Environment. DOI: 10.1016/j.scitotenv.2020.137647.
Mercury accumulation in tree rings: Observed trends in quantity and isotopic composition in Shenandoah National Park, Virginia. Scanlon, T. M., Riscassi, A. L., Demers, J. D., Camper, T. D., Lee, T. R., & Druckenbrod, D. L. 2020. Journal of Geophysical Research: Biogeosciences. DOI: 10.1029/2019JG005445.
Stream geochemical response to reductions in acid deposition in mid-Appalachian headwater streams: chronic versus episodic recovery from acidification. Riscassi, A.L., Scanlon, T.M., and Galloway, J.N. 2019. Hydrological Processes. DOI: 10.1002/hyp.13349.
Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA. Demers, J.D., Blum, J.D., Brooks, S.C., Donovan, P.M., Miller, C.L., Riscassi, A.L., Zheng, W. and Gu, B. 2018. Environmental Science: Processes & Impacts. DOI: 10.1039/C7EM00538E.
The effect of wildfire on streamwater mercury and organic carbon in a forested watershed in the southeastern United States. Jensen, A., Scanlon, T.M., and Riscassi, A.L. 2017. Environmental Science: Processes & Impacts. DOI: 10.1039/C7EM00419B.
Association of dissolved mercury with dissolved organic carbon in U.S. rivers and streams: The role of watershed soil organic carbon. Stoken, O.M., Riscassi A. L., and T.M. Scanlon. 2016. Water Resources Research. DOI: 10.1002/2015WR017849.
Seasonal and flow-driven dynamics of particulate and dissolved mercury and methylmercury in a stream impacted by an industrial mercury source. Riscassi, A.L, Miller, C.L., and S. Brooks. 2016. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.3310.
Evaluation of automated sampling techniques in an industrially contaminated creek for mercury and methylmercury analysis. Riscassi, A.L, Miller, C.L., and S. Brooks. 2014. Limnology and Oceanography: Methods. DOI: 10.1039/c0em00129e.
Seasonal contribution of dewfall to mercury deposition determined using a micrometeorological technique and dew chemistry. Converse, A.D., Riscassi, A.L and T.M. Scanlon. 2014. Journal of Geophysical Research – Atmospheres. DOI: 10.1002/2013JD020491.
Particulate and dissolved mercury export in streamwater within three mid-Appalachian forested watersheds in the US. Riscassi, A.L. and T.M. Scanlon. 2013. Journal of Hydrology. DOI: 10.1016/j.jhydrol.2013.07.041.
The Use of novel biomarkers to determine dietary mercury accumulation in nestling waterbirds. Clarkson, C., Erwin, M. and Riscassi, A.L. 2012. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.1767.
Controls on stream water dissolved mercury in three mid-Appalachian forested headwater catchments. Riscassi, A.L. and T.M. Scanlon. 2011. Water Resources Research. DOI: 10.1029/2011WR010977.
Using Ptilochronology to Determine Average Daily Mercury (Hg) Deposition in Feathers of Nestling Waterbirds. Clarkson, C. and Riscassi, A.L. 2011. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.591.
Streamwater particulate mercury and suspended sediment dynamics in a forested headwater catchment. Riscassi, A.L., Hokanson, K.J. and T.M. Scanlon. 2011. Water, Air, and Soil Pollution. DOI: 10.1007/s11270-010-0731-3.
Evaluation of an automated sampling technique to measure total mercury in streamwater during storm events. Riscassi, A.L., Converse, A.D., Hokanson, K.J. and T.M. Scanlon. 2010. Journal of Environmental Monitoring. DOI: 10.1039/c0em00129e.
Seasonal Variability in gaseous mercury fluxes measured in a high-elevation meadow. Converse, A.D., Riscassi, A.L. and T.M. Scanlon. 2010. Atmospheric Environment. DOI: 10.1016/j.atmosenv.2010.03.024.
Nitrate variability in hydrological flow paths for three mid-Appalachian forested watersheds following a large-scale defoliation. Riscassi, A. and T. M. Scanlon. 2009. Journal of Geophysical Research – Biogeosciences. DOI: 10.1029/2008JG000860.

**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

A v-notch weir in a summer forest.
A Weir on Pope's Brook Tributary in Sleepers River Research Watershed
A Weir on Pope's Brook Tributary in Sleepers River Research Watershed
A v-notch weir in a summer forest.

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A v-notch weir sits behind a USGS streamgage on Pope Brook Tributary in the W-9 section of Sleepers River Research Watershed in Danville, Vermont.

By
Ecosystems Land Change Science Program, New England Water Science Center
A v-notch weir in a summer forest.

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A Weir on Pope's Brook Tributary in Sleepers River Research Watershed

A v-notch weir sits behind a USGS streamgage on Pope Brook Tributary in the W-9 section of Sleepers River Research Watershed in Danville, Vermont.

By
Ecosystems Land Change Science Program, New England Water Science Center
A man stands in the woods surrounded by white pipes sticking out of the ground.
Sleepers River Research Watershed Soil Data Collection
Sleepers River Research Watershed Soil Data Collection
A man stands in the woods surrounded by white pipes sticking out of the ground.

Sleepers River Research Watershed Soil Data Collection

Sleepers River Research Watershed Soil Data Collection

USGS Hydrologist Jamie Shanley collecting data from soil sensors in the woods of the Sleepers River Research Watershed. These data loggers collect water content and concentrations of oxygen and carbon dioxide. 

By
Ecosystems Land Change Science Program, New England Water Science Center
A man stands in the woods surrounded by white pipes sticking out of the ground.

Sleepers River Research Watershed Soil Data Collection

Sleepers River Research Watershed Soil Data Collection

USGS Hydrologist Jamie Shanley collecting data from soil sensors in the woods of the Sleepers River Research Watershed. These data loggers collect water content and concentrations of oxygen and carbon dioxide. 

By
Ecosystems Land Change Science Program, New England Water Science Center

Flow velocity, water temperature, and conductivity at selected locations in Shark River Slough, Everglades National Park, Florida; July 1999 - July 2003 Flow velocity, water temperature, and conductivity at selected locations in Shark River Slough, Everglades National Park, Florida; July 1999 - July 2003

Flow-velocity, water-temperature, and conductivity data were collected at five locations in Shark River Slough, Everglades National Park (ENP), Florida, from 1999 to 2003. The data were collected as part of the U.S. Geological Survey Priority Ecosystems Science Initiative in support of the Comprehensive Everglades Restoration Plan. This report contains digital files and graphical plots...
Authors
Raymond W. Schaffranek, Ami L. Riscassi

Flow velocity, water temperature, and conductivity in Shark River Slough, Everglades National Park, Florida: June 2002–July 2003 Flow velocity, water temperature, and conductivity in Shark River Slough, Everglades National Park, Florida: June 2002–July 2003

The data described in this report were collected in the U. S. Geological Survey (USGS) Priority Ecosystems Science project investigating "Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades." Data collected at five locations in Shark River Slough, Everglades National Park, during the 2002-2003 wet season are documented in the report. Methods used to process the data...
Authors
Ami L. Riscassi, Raymond W. Schaffranek

Development of coastal flow and transport models in support of everglades restoration Development of coastal flow and transport models in support of everglades restoration

No abstract available.
Authors
Christian D. Langevin, Eric D. Swain, John D. Wang, Melinda A. Wolfert, Raymond W. Schaffranek, Ami L. Riscassi

Flow Velocity, Water Temperature, and Conductivity in Shark River Slough, Everglades National Park, Florida: August 2001-June 2002 Flow Velocity, Water Temperature, and Conductivity in Shark River Slough, Everglades National Park, Florida: August 2001-June 2002

The data-collection effort described in this report is in support of the U.S. Geological Survey (USGS) Place-Based Studies project investigating 'Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades.' Data collected at four locations in Shark River Slough, Everglades National Park, during the 2001-2002 wet season are documented in the report and methods used to...
Authors
Ami L. Riscassi, Raymond W. Schaffranek

Flow-velocity, water-temperature and conductivity data collected in Shark River Slough, Everglades National Park, during 1999-2000 and 2000-2001 wet seasons Flow-velocity, water-temperature and conductivity data collected in Shark River Slough, Everglades National Park, during 1999-2000 and 2000-2001 wet seasons

A project within the U. S. Geological Survey Place- Based Studies Program is focused on investigation of ?Forcing Effects on Flow Structure in Vegetated Wetlands of the Everglades.? Data-collection efforts conducted within this project at three locations in Shark River Slough, Everglades National Park, during the 1999-2000 and 2000-2001 wet seasons are described in this report...
Authors
Ami L. Riscassi, R.W. Schaffranek
By
Caribbean-Florida Water Science Center (CFWSC)

Non-USGS Publications**

Factors influencing seasonal chemistry patterns in Virginia mountain streams. Riscassi, A.L., Scanlon, T.M., and J.N. Galloway. 2024. Biogeochemistry. DOI: 10.1007/s10533-024-01163-x.
Diel Mercury Concentration Variations in a Mercury-Impacted Stream. Brooks, S.C., Riscassi, A.L., Miller, C., Lowe, Yin, X. and Mehlhorn, T.L. 2022. Environmental Science: Processes & Impacts. DOI: 10.1039/D2EM00142.
Increasing Temperature and Flow Management Alter Mercury Dynamics in East Fork Poplar Creek. Brooks, S.C., Miller, C., Riscassi, A.L., Lowe, K. A., Dickson, J., and Schwartz, G. 2021. Hydrological Processes. DOI: 10.1002/hyp.14344.
Shenandoah Watershed Study-Virginia Trout Stream Sensitivity Study (SWAS-VTSSS): Stream water quality and hydrologic monitoring data for mid-Appalachian headwater streams. Riscassi, A.L., Scanlon, T.M., Maben, S.W., and Galloway, J.N. 2021. Hydrological Processes. DOI: 10.1002/hyp.14164.
Stream Discharge and Water Quality Data for East Fork Poplar Creek from 2012 to Present. Brooks, S.C., Riscassi, A.L., and Lowe, K. A. 2021. Hydrological Processes. DOI: 10.1002/hyp.14103
Observed changes in chronic and episodic acidification in Virginia mountain streams in response to the Clean Air Act and amendments. Scanlon, T. M., Riscassi, A. L., and Galloway, J.N. 2021. Atmospheric Environment. DOI: 10.1016/j.atmosenv.2021.118279.
The Impacts of Stream Acidification on Fish Assemblages: Assessing Three Decades of Recovery in Shenandoah National Park. Harmon, P., Riscassi, A.L., Scanlon, T.M., Galloway, J.N., Demarest, D., & May, C. 2021. Global Ecology and Conservation. DOI: 10.1016/j.gecco.2020.e01386.
Recent advances in understanding and measurement of mercury in the environment: Terrestrial Hg cycling. Bishop, K., Shanley, J.B., Riscassi, A., de Wit, H.A., Eklöf, K., Meng, B., Mitchell, C., Osterwalder, S., Schuster, P., Webster, J. & Zhu, W. 2020. Science of the Total Environment. DOI: 10.1016/j.scitotenv.2020.137647.
Mercury accumulation in tree rings: Observed trends in quantity and isotopic composition in Shenandoah National Park, Virginia. Scanlon, T. M., Riscassi, A. L., Demers, J. D., Camper, T. D., Lee, T. R., & Druckenbrod, D. L. 2020. Journal of Geophysical Research: Biogeosciences. DOI: 10.1029/2019JG005445.
Stream geochemical response to reductions in acid deposition in mid-Appalachian headwater streams: chronic versus episodic recovery from acidification. Riscassi, A.L., Scanlon, T.M., and Galloway, J.N. 2019. Hydrological Processes. DOI: 10.1002/hyp.13349.
Hg isotopes reveal in-stream processing and legacy inputs in East Fork Poplar Creek, Oak Ridge, Tennessee, USA. Demers, J.D., Blum, J.D., Brooks, S.C., Donovan, P.M., Miller, C.L., Riscassi, A.L., Zheng, W. and Gu, B. 2018. Environmental Science: Processes & Impacts. DOI: 10.1039/C7EM00538E.
The effect of wildfire on streamwater mercury and organic carbon in a forested watershed in the southeastern United States. Jensen, A., Scanlon, T.M., and Riscassi, A.L. 2017. Environmental Science: Processes & Impacts. DOI: 10.1039/C7EM00419B.
Association of dissolved mercury with dissolved organic carbon in U.S. rivers and streams: The role of watershed soil organic carbon. Stoken, O.M., Riscassi A. L., and T.M. Scanlon. 2016. Water Resources Research. DOI: 10.1002/2015WR017849.
Seasonal and flow-driven dynamics of particulate and dissolved mercury and methylmercury in a stream impacted by an industrial mercury source. Riscassi, A.L, Miller, C.L., and S. Brooks. 2016. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.3310.
Evaluation of automated sampling techniques in an industrially contaminated creek for mercury and methylmercury analysis. Riscassi, A.L, Miller, C.L., and S. Brooks. 2014. Limnology and Oceanography: Methods. DOI: 10.1039/c0em00129e.
Seasonal contribution of dewfall to mercury deposition determined using a micrometeorological technique and dew chemistry. Converse, A.D., Riscassi, A.L and T.M. Scanlon. 2014. Journal of Geophysical Research – Atmospheres. DOI: 10.1002/2013JD020491.
Particulate and dissolved mercury export in streamwater within three mid-Appalachian forested watersheds in the US. Riscassi, A.L. and T.M. Scanlon. 2013. Journal of Hydrology. DOI: 10.1016/j.jhydrol.2013.07.041.
The Use of novel biomarkers to determine dietary mercury accumulation in nestling waterbirds. Clarkson, C., Erwin, M. and Riscassi, A.L. 2012. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.1767.
Controls on stream water dissolved mercury in three mid-Appalachian forested headwater catchments. Riscassi, A.L. and T.M. Scanlon. 2011. Water Resources Research. DOI: 10.1029/2011WR010977.
Using Ptilochronology to Determine Average Daily Mercury (Hg) Deposition in Feathers of Nestling Waterbirds. Clarkson, C. and Riscassi, A.L. 2011. Environmental Toxicology and Chemistry. DOI: 10.1002/etc.591.
Streamwater particulate mercury and suspended sediment dynamics in a forested headwater catchment. Riscassi, A.L., Hokanson, K.J. and T.M. Scanlon. 2011. Water, Air, and Soil Pollution. DOI: 10.1007/s11270-010-0731-3.
Evaluation of an automated sampling technique to measure total mercury in streamwater during storm events. Riscassi, A.L., Converse, A.D., Hokanson, K.J. and T.M. Scanlon. 2010. Journal of Environmental Monitoring. DOI: 10.1039/c0em00129e.
Seasonal Variability in gaseous mercury fluxes measured in a high-elevation meadow. Converse, A.D., Riscassi, A.L. and T.M. Scanlon. 2010. Atmospheric Environment. DOI: 10.1016/j.atmosenv.2010.03.024.
Nitrate variability in hydrological flow paths for three mid-Appalachian forested watersheds following a large-scale defoliation. Riscassi, A. and T. M. Scanlon. 2009. Journal of Geophysical Research – Biogeosciences. DOI: 10.1029/2008JG000860.

**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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