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Matthew A Thomas

Matt Thomas is a research hydrologist in the Landslide Hazards Program.

I am a quantitative geoscientist excited to work on societally relevant earth science and engineering problems. My research at the USGS contributes to rainfall-induced landslide and post-fire debris-flow hazard warning products designed to reduce loss of life and property.

Professional Experience

  • 2022 –             Research Hydrologist, U.S. Geological Survey, Golden, CO

  • 2017 – 2021     Mendenhall Postdoctoral Fellow, U.S. Geological Survey, Golden, CO

  • 2015 – 2017     R&D Geosciences Engineer, Sandia National Laboratories, Carlsbad, NM

  • 2014 – 2015     Postdoctoral Scholar, Stanford University, Stanford, CA   

  • 2009 – 2014    Graduate Student Researcher, Stanford University, Stanford, CA

  • 2008 – 2009    Staff Geologist, Cornerstone Earth Group, Sunnyvale, CA

Education and Certifications

  • 2014     PhD in Hydrogeology, Stanford University

  • 2014     MS in Civil and Environmental Engineering, Stanford University

  • 2008     BS in Geology, University of California Los Angeles

Science and Products

burned mountain slope with charred trees, and two people near a landslide monitoring instrument

Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Wildfire can radically change a mountainous landscape such that even a modest rainstorm is capable of producing deadly and destructive flash flooding and debris flows.
By
Natural Hazards Mission Area, Landslide Hazards Program
Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Wildfire can radically change a mountainous landscape such that even a modest rainstorm is capable of producing deadly and destructive flash flooding and debris flows.
Learn More
mountain tops with burn scars, and landslide instrument in foreground

Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
By
Natural Hazards Mission Area, Landslide Hazards Program, Supplemental Appropriations for Disaster Recovery Activities
Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
Learn More
mountainous valley with burn scar in foreground and person near an instrument with a solar panel

Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
By
Natural Hazards Mission Area, Landslide Hazards Program, Supplemental Appropriations for Disaster Recovery Activities
Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
Learn More
Filter Total Items: 15

Rainfall, Volumetric soil-water content, Video, and Geophone Data from the Calwood Fire Burn Area, Colorado, April 2021 to November 2023 Rainfall, Volumetric soil-water content, Video, and Geophone Data from the Calwood Fire Burn Area, Colorado, April 2021 to November 2023

Rainfall, volumetric soil-water content, video, and geophone data characterizing postfire rainfall and runoff were collected at two stations in the 2020 Calwood Fire Burn Area in Colorado. This release contains data from stations at two sites named Heil Ranch (40° 8' 43.47" N, 105° 20' 26.352" W) and Calwood (40° 9' 4.76" N, 105° 21' 20.79" W). The data presented here were collected from...
By
Landslide Hazards Program, Geologic Hazards Science Center

International compilation of peak discharge estimates of floods and runoff-generated debris flows, 1931-2023 International compilation of peak discharge estimates of floods and runoff-generated debris flows, 1931-2023

This data release contains an international compilation of 656 peak discharge estimates of floods and runoff-generated debris flows. The data (“DimensionlessDischarge.csv” and “CrossSections.csv”) were obtained from the literature and measured in the study Cavagnaro and others (2024). The dataset also includes information about flow depth, flow type (flood or debris flow), flow cross...
By
Eastern Ecological Science Center, Supplemental Appropriations for Disaster Recovery Activities

Field observations of landslides and related materials following Hurricane Maria, Puerto Rico Field observations of landslides and related materials following Hurricane Maria, Puerto Rico

During September 2017, Hurricane Maria caused widespread landsliding throughout mountainous regions of Puerto Rico, with more than 71,000 landslides being subsequently identified from aerial imagery (Hughes et al., 2019). Most landslides apparently mobilized as debris flows and occurred within soil (unconsolidated material overlying saprolite and bedrock) and saprolite overlying less...
By
Geologic Hazards Science Center

Field-verified inventory of postfire hydrologic response for the 2020 CZU Lightning Complex, River, Camel, and Dolan Fires following a 26-29 January 2021 atmospheric river storm sequence Field-verified inventory of postfire hydrologic response for the 2020 CZU Lightning Complex, River, Camel, and Dolan Fires following a 26-29 January 2021 atmospheric river storm sequence

This data release is a field-verified inventory of postfire hydrologic response for the 2020 CZU (San Mateo–Santa Cruz Unit) Lightning Complex, River Fire, Camel Fire, and Dolan Fire following a 26-29 January 2021 atmospheric river storm sequence. Postfire hydrologic response types include a) no response, b) minor response, and c) major response. A “minor” response was deemed capable of...
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm Field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm

Summary This data release is a field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm. The “README.txt” file describes the fields for the “Inventory.csv” file. The “Chambers” and “Chips” rain gage data referenced in the inventory are included as: “Chambers-Oct2021-Storm.csv”, “Chambers...
By
Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Soil moisture monitoring following the 2009 Station Fire, California, USA, 2016-2019 Soil moisture monitoring following the 2009 Station Fire, California, USA, 2016-2019

This data release includes 2016-2019 soil moisture timeseries for two drainage basins ("Arroyo Seco" and "Dunsmore Canyon") that burned during the 2009 Station Fire in Los Angeles County, California, USA. The Arroyo Seco (0.01 km2) and Dunsmore Canyon (0.5 km2) drainages include two soil pits, one located near the drainage divide and another near the basin outlet. Following the naming...
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center
No results found.
Filter Total Items: 21

How long do runoff-generated debris-flow hazards persist after wildfire? How long do runoff-generated debris-flow hazards persist after wildfire?

Runoff-generated debris flows are a potentially destructive and deadly response to wildfire until sufficient vegetation and soil-hydraulic recovery have reduced susceptibility to the hazard. Elevated debris-flow susceptibility may persist for several years, but the controls on the timespan of the susceptible period are poorly understood. To evaluate the connection between vegetation...
Authors
Andrew Paul Graber, Matthew A. Thomas, Jason W. Kean
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

The spatial distribution of debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California The spatial distribution of debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California

A range of hydrologic responses can be observed in steep, recently burned terrain, which makes predicting the spatial distribution of large debris flows challenging. Studies from rainfall-induced landslides in unburned areas show evidence of hydroclimatic tuning of landslide triggering, such that the spatial distribution of events is best predicted by the observed rainfall anomaly...
Authors
David B. Cavagnaro, Scott W. McCoy, Matthew A. Thomas, Jaime Kostelnik, Donald N. Lindsay
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center

Postfire hydrologic response along the central California (USA) coast: Insights for the emergency assessment of postfire debris-flow hazards Postfire hydrologic response along the central California (USA) coast: Insights for the emergency assessment of postfire debris-flow hazards

The steep, tectonically active terrain along the Central California (USA) coast is well known to produce deadly and destructive debris flows. However, the extent to which fire affects debris-flow susceptibility in this region is an open question. We documented the occurrence of postfire debris floods and flows following the landfall of a storm that delivered intense rainfall across...
Authors
Matthew A. Thomas, Jason W. Kean, Scott W. McCoy, Donald N. Lindsay, Jaime Kostelnik, David B. Cavagnaro, Francis K. Rengers, Amy E. East, Jonathan Schwartz, Douglas P. Smith, Brian D. Collins
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Pacific Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities, Wildland Fire Science

The rainfall intensity-duration control of debris flows after wildfire The rainfall intensity-duration control of debris flows after wildfire

Increased wildfire activity in the western United States has exposed regional gaps in our understanding of postfire debris-flow generation. To address this problem, we characterized flows in an unstudied area to test the rainfall intensity-duration control of the hazard. Our rainfall measurements and field observations from the northern Sierra Nevada (California, USA) show that debris...
Authors
Matthew A. Thomas, Donald N. Lindsay, David B. Cavagnaro, Jason W. Kean, Scott W. McCoy, Andrew Paul Graber
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Postwildfire soil‐hydraulic recovery and the persistence of debris flow hazards Postwildfire soil‐hydraulic recovery and the persistence of debris flow hazards

Deadly and destructive debris flows often follow wildfire, but understanding of changes in the hazard potential with time since fire is poor. We develop a simulation‐based framework to quantify changes in the hydrologic triggering conditions for debris flows as postwildfire infiltration properties evolve through time. Our approach produces time‐varying rainfall intensity‐duration...
Authors
Matthew A. Thomas, Francis K. Rengers, Jason W. Kean, Luke A. McGuire, Dennis M. Staley, Katherine R. Barnhart, Brian A. Ebel
By
Natural Hazards Mission Area, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities, Wildland Fire Science

Hillslopes in humid-tropical climates aren’t always wet: Implications for hydrologic response and landslide initiation in Puerto Rico, USA Hillslopes in humid-tropical climates aren’t always wet: Implications for hydrologic response and landslide initiation in Puerto Rico, USA

The devastating impacts of the widespread flooding and landsliding in Puerto Rico following the September 2017 landfall of Hurricane Maria highlight the increasingly extreme atmospheric disturbances and enhanced hazard potential in mountainous humid‐tropical climate zones. Long‐standing conceptual models for hydrologically driven hazards in Puerto Rico posit that hillslope soils remain...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Joel B. Smith
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Non-USGS Publications**

Thomas MA, Kuhlman KL, & Ward AL (2017) Anthropogenic influences on groundwater in the vicinity of a long-lived radioactive waste repository. Hydrological Processes. https://doi.org/10.1002/hyp.11214
Frederick JM, Thomas MA, Bull D, Jones CA, & Roberts JD (2016) The Arctic coastal erosion problem. SAND Technical Report Series. https://doi.org/10.2172/1431492
Thomas MA & Loague K (2016) Landscape change as recorded by the Ocean Shore Railroad. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.22.3.209
Thomas MA & Kennard P (2015) Topographic and hydrologic insight for the Westside Road problem. Natural Resource Technical Report Series. https://irma.nps.gov/DataStore/Reference/Profile/2224800
Thomas MA, Loague K, & Voss CI (2015) Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation. Hydrological Processes. https://doi.org/10.1002/hyp.10267
Thomas MA & Loague K (2014) Hydrogeologic insights for a Devil's Slide-like system. Water Resources Research. https://doi.org/10.1002/2014WR015649
Pettit MM, Thomas MA, & Loague K (2014) Retreat of a coastal bluff in Pacifica, California. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.20.2.153
Thomas MA & Loague K (2014) Devil’s Slide: An evolving feature of California’s coastal landscape. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.20.1.45

**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

burned mountain slope with charred trees, and two people near a landslide monitoring instrument

Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Wildfire can radically change a mountainous landscape such that even a modest rainstorm is capable of producing deadly and destructive flash flooding and debris flows.
By
Natural Hazards Mission Area, Landslide Hazards Program
Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Calwood Fire "Heil Ranch" Landslide Monitoring Site near Boulder, CO

Wildfire can radically change a mountainous landscape such that even a modest rainstorm is capable of producing deadly and destructive flash flooding and debris flows.
Learn More
mountain tops with burn scars, and landslide instrument in foreground

Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
By
Natural Hazards Mission Area, Landslide Hazards Program, Supplemental Appropriations for Disaster Recovery Activities
Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Postfire Landslide Monitoring Station: "Chips" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
Learn More
mountainous valley with burn scar in foreground and person near an instrument with a solar panel

Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
By
Natural Hazards Mission Area, Landslide Hazards Program, Supplemental Appropriations for Disaster Recovery Activities
Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Postfire Landslide Monitoring Station: "Chambers" (2021 Dixie Fire) near Belden, CA

Wildfire can increase landslide susceptibility in mountainous terrain. The USGS maintains postfire landslide monitoring stations to track hillslope hydrologic conditions in the years following fire.
Learn More
Filter Total Items: 15

Rainfall, Volumetric soil-water content, Video, and Geophone Data from the Calwood Fire Burn Area, Colorado, April 2021 to November 2023 Rainfall, Volumetric soil-water content, Video, and Geophone Data from the Calwood Fire Burn Area, Colorado, April 2021 to November 2023

Rainfall, volumetric soil-water content, video, and geophone data characterizing postfire rainfall and runoff were collected at two stations in the 2020 Calwood Fire Burn Area in Colorado. This release contains data from stations at two sites named Heil Ranch (40° 8' 43.47" N, 105° 20' 26.352" W) and Calwood (40° 9' 4.76" N, 105° 21' 20.79" W). The data presented here were collected from...
By
Landslide Hazards Program, Geologic Hazards Science Center

International compilation of peak discharge estimates of floods and runoff-generated debris flows, 1931-2023 International compilation of peak discharge estimates of floods and runoff-generated debris flows, 1931-2023

This data release contains an international compilation of 656 peak discharge estimates of floods and runoff-generated debris flows. The data (“DimensionlessDischarge.csv” and “CrossSections.csv”) were obtained from the literature and measured in the study Cavagnaro and others (2024). The dataset also includes information about flow depth, flow type (flood or debris flow), flow cross...
By
Eastern Ecological Science Center, Supplemental Appropriations for Disaster Recovery Activities

Field observations of landslides and related materials following Hurricane Maria, Puerto Rico Field observations of landslides and related materials following Hurricane Maria, Puerto Rico

During September 2017, Hurricane Maria caused widespread landsliding throughout mountainous regions of Puerto Rico, with more than 71,000 landslides being subsequently identified from aerial imagery (Hughes et al., 2019). Most landslides apparently mobilized as debris flows and occurred within soil (unconsolidated material overlying saprolite and bedrock) and saprolite overlying less...
By
Geologic Hazards Science Center

Field-verified inventory of postfire hydrologic response for the 2020 CZU Lightning Complex, River, Camel, and Dolan Fires following a 26-29 January 2021 atmospheric river storm sequence Field-verified inventory of postfire hydrologic response for the 2020 CZU Lightning Complex, River, Camel, and Dolan Fires following a 26-29 January 2021 atmospheric river storm sequence

This data release is a field-verified inventory of postfire hydrologic response for the 2020 CZU (San Mateo–Santa Cruz Unit) Lightning Complex, River Fire, Camel Fire, and Dolan Fire following a 26-29 January 2021 atmospheric river storm sequence. Postfire hydrologic response types include a) no response, b) minor response, and c) major response. A “minor” response was deemed capable of...
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm Field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm

Summary This data release is a field-verified inventory of postfire debris flows for the 2021 Dixie Fire following a 23-25 October 2021 atmospheric river storm and 12 June 2022 thunderstorm. The “README.txt” file describes the fields for the “Inventory.csv” file. The “Chambers” and “Chips” rain gage data referenced in the inventory are included as: “Chambers-Oct2021-Storm.csv”, “Chambers...
By
Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Soil moisture monitoring following the 2009 Station Fire, California, USA, 2016-2019 Soil moisture monitoring following the 2009 Station Fire, California, USA, 2016-2019

This data release includes 2016-2019 soil moisture timeseries for two drainage basins ("Arroyo Seco" and "Dunsmore Canyon") that burned during the 2009 Station Fire in Los Angeles County, California, USA. The Arroyo Seco (0.01 km2) and Dunsmore Canyon (0.5 km2) drainages include two soil pits, one located near the drainage divide and another near the basin outlet. Following the naming...
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center
No results found.
Filter Total Items: 21

How long do runoff-generated debris-flow hazards persist after wildfire? How long do runoff-generated debris-flow hazards persist after wildfire?

Runoff-generated debris flows are a potentially destructive and deadly response to wildfire until sufficient vegetation and soil-hydraulic recovery have reduced susceptibility to the hazard. Elevated debris-flow susceptibility may persist for several years, but the controls on the timespan of the susceptible period are poorly understood. To evaluate the connection between vegetation...
Authors
Andrew Paul Graber, Matthew A. Thomas, Jason W. Kean
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

The spatial distribution of debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California The spatial distribution of debris flows in relation to observed rainfall anomalies: Insights from the Dolan Fire, California

A range of hydrologic responses can be observed in steep, recently burned terrain, which makes predicting the spatial distribution of large debris flows challenging. Studies from rainfall-induced landslides in unburned areas show evidence of hydroclimatic tuning of landslide triggering, such that the spatial distribution of events is best predicted by the observed rainfall anomaly...
Authors
David B. Cavagnaro, Scott W. McCoy, Matthew A. Thomas, Jaime Kostelnik, Donald N. Lindsay
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center

Postfire hydrologic response along the central California (USA) coast: Insights for the emergency assessment of postfire debris-flow hazards Postfire hydrologic response along the central California (USA) coast: Insights for the emergency assessment of postfire debris-flow hazards

The steep, tectonically active terrain along the Central California (USA) coast is well known to produce deadly and destructive debris flows. However, the extent to which fire affects debris-flow susceptibility in this region is an open question. We documented the occurrence of postfire debris floods and flows following the landfall of a storm that delivered intense rainfall across...
Authors
Matthew A. Thomas, Jason W. Kean, Scott W. McCoy, Donald N. Lindsay, Jaime Kostelnik, David B. Cavagnaro, Francis K. Rengers, Amy E. East, Jonathan Schwartz, Douglas P. Smith, Brian D. Collins
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center, Pacific Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities, Wildland Fire Science

The rainfall intensity-duration control of debris flows after wildfire The rainfall intensity-duration control of debris flows after wildfire

Increased wildfire activity in the western United States has exposed regional gaps in our understanding of postfire debris-flow generation. To address this problem, we characterized flows in an unstudied area to test the rainfall intensity-duration control of the hazard. Our rainfall measurements and field observations from the northern Sierra Nevada (California, USA) show that debris...
Authors
Matthew A. Thomas, Donald N. Lindsay, David B. Cavagnaro, Jason W. Kean, Scott W. McCoy, Andrew Paul Graber
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Postwildfire soil‐hydraulic recovery and the persistence of debris flow hazards Postwildfire soil‐hydraulic recovery and the persistence of debris flow hazards

Deadly and destructive debris flows often follow wildfire, but understanding of changes in the hazard potential with time since fire is poor. We develop a simulation‐based framework to quantify changes in the hydrologic triggering conditions for debris flows as postwildfire infiltration properties evolve through time. Our approach produces time‐varying rainfall intensity‐duration...
Authors
Matthew A. Thomas, Francis K. Rengers, Jason W. Kean, Luke A. McGuire, Dennis M. Staley, Katherine R. Barnhart, Brian A. Ebel
By
Natural Hazards Mission Area, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities, Wildland Fire Science

Hillslopes in humid-tropical climates aren’t always wet: Implications for hydrologic response and landslide initiation in Puerto Rico, USA Hillslopes in humid-tropical climates aren’t always wet: Implications for hydrologic response and landslide initiation in Puerto Rico, USA

The devastating impacts of the widespread flooding and landsliding in Puerto Rico following the September 2017 landfall of Hurricane Maria highlight the increasingly extreme atmospheric disturbances and enhanced hazard potential in mountainous humid‐tropical climate zones. Long‐standing conceptual models for hydrologically driven hazards in Puerto Rico posit that hillslope soils remain...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Joel B. Smith
By
Natural Hazards Mission Area, Landslide Hazards Program, Geologic Hazards Science Center, Supplemental Appropriations for Disaster Recovery Activities

Non-USGS Publications**

Thomas MA, Kuhlman KL, & Ward AL (2017) Anthropogenic influences on groundwater in the vicinity of a long-lived radioactive waste repository. Hydrological Processes. https://doi.org/10.1002/hyp.11214
Frederick JM, Thomas MA, Bull D, Jones CA, & Roberts JD (2016) The Arctic coastal erosion problem. SAND Technical Report Series. https://doi.org/10.2172/1431492
Thomas MA & Loague K (2016) Landscape change as recorded by the Ocean Shore Railroad. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.22.3.209
Thomas MA & Kennard P (2015) Topographic and hydrologic insight for the Westside Road problem. Natural Resource Technical Report Series. https://irma.nps.gov/DataStore/Reference/Profile/2224800
Thomas MA, Loague K, & Voss CI (2015) Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation. Hydrological Processes. https://doi.org/10.1002/hyp.10267
Thomas MA & Loague K (2014) Hydrogeologic insights for a Devil's Slide-like system. Water Resources Research. https://doi.org/10.1002/2014WR015649
Pettit MM, Thomas MA, & Loague K (2014) Retreat of a coastal bluff in Pacifica, California. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.20.2.153
Thomas MA & Loague K (2014) Devil’s Slide: An evolving feature of California’s coastal landscape. Environmental and Engineering Geoscience. https://doi.org/10.2113/gseegeosci.20.1.45

**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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