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
Filter Total Items: 19
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...
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...
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...
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...
Hillslope hydrologic monitoring data following Hurricane Maria in 2017, Puerto Rico, July 2018 to June 2020 Hillslope hydrologic monitoring data following Hurricane Maria in 2017, Puerto Rico, July 2018 to June 2020
This data release includes time-series, qualitative descriptions, and laboratory testing data from two monitoring stations installed in Puerto Rico following Hurricane Maria in 2017, which led to tens of thousands of landslides across the island (Bessette-Kirton et al., 2017). The stations were installed in July of 2018 to investigate subsurface hydrologic response to rainfall and...
Infiltration data collected post-Hurricane Maria across landslide source area materials, Puerto Rico, USA Infiltration data collected post-Hurricane Maria across landslide source area materials, Puerto Rico, USA
This Data Release includes information to support the characterization of surface/near-surface infiltration rates of selected landslide source area materials following Hurricane Maria across Puerto Rico, USA. The dataset includes comma-delimited measurements of field-saturated hydraulic conductivity (Kfs) collected over two field campaigns (Fall 2018 and Spring 2019) as well as...
Field data used to support hydrologic modeling for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site Field data used to support hydrologic modeling for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site
This Data Release includes information used to support numerical simulations of variably-saturated flow focused on measurement-based variability in soil-water retention properties for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site in the East Bay region of California, USA (see Thomas et al., 2018). The eight datasets are: (1) geologic and...
Filter Total Items: 24
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
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
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
Deep Learning as a tool to forecast hydrologic response for landslide-prone hillslopes Deep Learning as a tool to forecast hydrologic response for landslide-prone hillslopes
Empirical thresholds for landslide warning systems have benefitted from the incorporation of soil‐hydrologic monitoring data, but the mechanistic basis for their predictive capabilities is limited. Although physically based hydrologic models can accurately simulate changes in soil moisture and pore pressure that promote landslides, their utility is restricted by high computational costs...
Authors
Elijah Orland, Joshua J. Roering, Matthew A. Thomas, Benjamin B. Mirus
Geometric and material variability influences stress states relevant to coastal permafrost bluff failure Geometric and material variability influences stress states relevant to coastal permafrost bluff failure
Scientific knowledge and engineering tools for predicting coastal erosion are largely confined to temperate climate zones that are dominated by non-cohesive sediments. The pattern of erosion exhibited by the ice-bonded permafrost bluffs in Arctic Alaska, however, is not well explained by these tools. Investigation of the oceanographic, thermal, and mechanical processes that are relevant...
Authors
Matthew A. Thomas, Alejandro Mota, Benjamin M. Jones, R. Charles Choens, Jennifer M. Frederick, Diana L. Bull
Assessing the feasibility of satellite-based thresholds for hydrologically driven landsliding Assessing the feasibility of satellite-based thresholds for hydrologically driven landsliding
Elevated soil moisture and heavy precipitation contribute to landslides worldwide. These environmental variables are now being resolved with satellites at spatiotemporal scales that could offer new perspectives on the development of landslide warning systems. However, the application of these data to hydro-meteorological thresholds (which account for antecedent soil moisture and rainfall...
Authors
Matthew A. Thomas, Brian D. Collins, Benjamin B. Mirus
Landslides triggered by Hurricane Maria: Assessment of an extreme event in Puerto Rico Landslides triggered by Hurricane Maria: Assessment of an extreme event in Puerto Rico
Hurricane Maria hit the island of Puerto Rico on 20 September 2017 and triggered more than 40,000 landslides in at least three-fourths of Puerto Rico’s 78 municipalities. The number of landslides that occurred during this event was two orders of magnitude greater than those reported from previous hurricanes. Landslide source areas were commonly limited to surficial soils but also...
Authors
Erin Bessette-Kirton, Corina Cerovski-Darriau, William H. Schulz, Jeffrey A. Coe, Jason W. Kean, Jonathan W. Godt, Matthew A. Thomas, K. Stephen Hughes
A decade of remotely sensed observations highlight complex processes linked to coastal permafrost bluff erosion in the Arctic A decade of remotely sensed observations highlight complex processes linked to coastal permafrost bluff erosion in the Arctic
Eroding permafrost coasts are indicators and integrators of changes in the Arctic System as they are susceptible to the combined effects of declining sea ice extent, increases in open water duration, more frequent and impactful storms, sea-level rise, and warming permafrost. However, few observation sites in the Arctic have yet to link decadal-scale erosion rates with changing...
Authors
Benjamin M. Jones, Louise M. Farquharson, Carson Baughman, Richard M. Buzard, Christopher D. Arp, Guido Grosse, Diana L. Bull, Frank Gunther, Ingmar Nitze, Frank Urban, Jeremy L. Kasper, Jennifer M. Frederick, Matthew A. Thomas, Craig Jones, Alejandro Mota, Scott Dallimore, Craig E. Tweedie, Christopher V. Maio, Daniel H. Mann, Bruce M. Richmond, Ann E. Gibbs, Ming Xiao, Torsten Sachs, Go Iwahana, Mikhail Z. Kanevskiy, Vladimir E. Romanovsky
Identifying physics‐based thresholds for rainfall‐induced landsliding Identifying physics‐based thresholds for rainfall‐induced landsliding
Most regional landslide warning systems utilize empirically derived rainfall thresholds that are difficult to improve without recalibration to additional landslide events. To address this limitation, we explored the use of synthetic rainfall to generate thousands of possible storm patterns and coupled them with a physics‐based hydrology and slope stability model for various antecedent...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Brian D. Collins
Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria
Rainfall-induced shallow landsliding is a persistent hazard to human life and property. Despite the observed connection between infiltration through the unsaturated zone and shallow landslide initiation, there is considerable uncertainty in how estimates of unsaturated soil-water retention properties affect slope stability assessment. This source of uncertainty is critical to evaluating...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Brian D. Collins, Ning Lu, Jonathan W. Godt
Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation
This study employs a hydrogeologic simulation approach to investigate subsurface fluid pressures for a landslide-prone section of the central California, USA, coast known as Devil's Slide. Understanding the relative changes in subsurface fluid pressures is important for systems, such as Devil's Slide, where slope creep can be interrupted by episodic slip events. Surface mapping...
Authors
Matthew A. Thomas, Keith Loague, Clifford I. Voss
Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology
No abstract available.
Authors
Pamela J. Schofield, James D. Williams, Leo G. Nico, Pamela L. Fuller, Matthew R. Thomas
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
Filter Total Items: 19
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...
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...
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...
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...
Hillslope hydrologic monitoring data following Hurricane Maria in 2017, Puerto Rico, July 2018 to June 2020 Hillslope hydrologic monitoring data following Hurricane Maria in 2017, Puerto Rico, July 2018 to June 2020
This data release includes time-series, qualitative descriptions, and laboratory testing data from two monitoring stations installed in Puerto Rico following Hurricane Maria in 2017, which led to tens of thousands of landslides across the island (Bessette-Kirton et al., 2017). The stations were installed in July of 2018 to investigate subsurface hydrologic response to rainfall and...
Infiltration data collected post-Hurricane Maria across landslide source area materials, Puerto Rico, USA Infiltration data collected post-Hurricane Maria across landslide source area materials, Puerto Rico, USA
This Data Release includes information to support the characterization of surface/near-surface infiltration rates of selected landslide source area materials following Hurricane Maria across Puerto Rico, USA. The dataset includes comma-delimited measurements of field-saturated hydraulic conductivity (Kfs) collected over two field campaigns (Fall 2018 and Spring 2019) as well as...
Field data used to support hydrologic modeling for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site Field data used to support hydrologic modeling for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site
This Data Release includes information used to support numerical simulations of variably-saturated flow focused on measurement-based variability in soil-water retention properties for the U.S. Geological Survey's San Francisco Bay Area "BALT1" landslide monitoring site in the East Bay region of California, USA (see Thomas et al., 2018). The eight datasets are: (1) geologic and...
Filter Total Items: 24
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
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
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
Deep Learning as a tool to forecast hydrologic response for landslide-prone hillslopes Deep Learning as a tool to forecast hydrologic response for landslide-prone hillslopes
Empirical thresholds for landslide warning systems have benefitted from the incorporation of soil‐hydrologic monitoring data, but the mechanistic basis for their predictive capabilities is limited. Although physically based hydrologic models can accurately simulate changes in soil moisture and pore pressure that promote landslides, their utility is restricted by high computational costs...
Authors
Elijah Orland, Joshua J. Roering, Matthew A. Thomas, Benjamin B. Mirus
Geometric and material variability influences stress states relevant to coastal permafrost bluff failure Geometric and material variability influences stress states relevant to coastal permafrost bluff failure
Scientific knowledge and engineering tools for predicting coastal erosion are largely confined to temperate climate zones that are dominated by non-cohesive sediments. The pattern of erosion exhibited by the ice-bonded permafrost bluffs in Arctic Alaska, however, is not well explained by these tools. Investigation of the oceanographic, thermal, and mechanical processes that are relevant...
Authors
Matthew A. Thomas, Alejandro Mota, Benjamin M. Jones, R. Charles Choens, Jennifer M. Frederick, Diana L. Bull
Assessing the feasibility of satellite-based thresholds for hydrologically driven landsliding Assessing the feasibility of satellite-based thresholds for hydrologically driven landsliding
Elevated soil moisture and heavy precipitation contribute to landslides worldwide. These environmental variables are now being resolved with satellites at spatiotemporal scales that could offer new perspectives on the development of landslide warning systems. However, the application of these data to hydro-meteorological thresholds (which account for antecedent soil moisture and rainfall...
Authors
Matthew A. Thomas, Brian D. Collins, Benjamin B. Mirus
Landslides triggered by Hurricane Maria: Assessment of an extreme event in Puerto Rico Landslides triggered by Hurricane Maria: Assessment of an extreme event in Puerto Rico
Hurricane Maria hit the island of Puerto Rico on 20 September 2017 and triggered more than 40,000 landslides in at least three-fourths of Puerto Rico’s 78 municipalities. The number of landslides that occurred during this event was two orders of magnitude greater than those reported from previous hurricanes. Landslide source areas were commonly limited to surficial soils but also...
Authors
Erin Bessette-Kirton, Corina Cerovski-Darriau, William H. Schulz, Jeffrey A. Coe, Jason W. Kean, Jonathan W. Godt, Matthew A. Thomas, K. Stephen Hughes
A decade of remotely sensed observations highlight complex processes linked to coastal permafrost bluff erosion in the Arctic A decade of remotely sensed observations highlight complex processes linked to coastal permafrost bluff erosion in the Arctic
Eroding permafrost coasts are indicators and integrators of changes in the Arctic System as they are susceptible to the combined effects of declining sea ice extent, increases in open water duration, more frequent and impactful storms, sea-level rise, and warming permafrost. However, few observation sites in the Arctic have yet to link decadal-scale erosion rates with changing...
Authors
Benjamin M. Jones, Louise M. Farquharson, Carson Baughman, Richard M. Buzard, Christopher D. Arp, Guido Grosse, Diana L. Bull, Frank Gunther, Ingmar Nitze, Frank Urban, Jeremy L. Kasper, Jennifer M. Frederick, Matthew A. Thomas, Craig Jones, Alejandro Mota, Scott Dallimore, Craig E. Tweedie, Christopher V. Maio, Daniel H. Mann, Bruce M. Richmond, Ann E. Gibbs, Ming Xiao, Torsten Sachs, Go Iwahana, Mikhail Z. Kanevskiy, Vladimir E. Romanovsky
Identifying physics‐based thresholds for rainfall‐induced landsliding Identifying physics‐based thresholds for rainfall‐induced landsliding
Most regional landslide warning systems utilize empirically derived rainfall thresholds that are difficult to improve without recalibration to additional landslide events. To address this limitation, we explored the use of synthetic rainfall to generate thousands of possible storm patterns and coupled them with a physics‐based hydrology and slope stability model for various antecedent...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Brian D. Collins
Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria Variability in soil-water retention properties and implications for physics-based simulation of landslide early warning criteria
Rainfall-induced shallow landsliding is a persistent hazard to human life and property. Despite the observed connection between infiltration through the unsaturated zone and shallow landslide initiation, there is considerable uncertainty in how estimates of unsaturated soil-water retention properties affect slope stability assessment. This source of uncertainty is critical to evaluating...
Authors
Matthew A. Thomas, Benjamin B. Mirus, Brian D. Collins, Ning Lu, Jonathan W. Godt
Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation Fluid pressure responses for a Devil's Slide-like system: problem formulation and simulation
This study employs a hydrogeologic simulation approach to investigate subsurface fluid pressures for a landslide-prone section of the central California, USA, coast known as Devil's Slide. Understanding the relative changes in subsurface fluid pressures is important for systems, such as Devil's Slide, where slope creep can be interrupted by episodic slip events. Surface mapping...
Authors
Matthew A. Thomas, Keith Loague, Clifford I. Voss
Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology Foreign Nonindigenous Carps and Minnows (Cyprinidae) in the United States - A Guide to their Identification, Distribution, and Biology
No abstract available.
Authors
Pamela J. Schofield, James D. Williams, Leo G. Nico, Pamela L. Fuller, Matthew R. Thomas
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.