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Liv Herdman

Liv integrates numerical models and field measurements to understand the aquatic environment (rivers, lakes, estuaries and oceans) and its interactions with the human built environment and how the hydrodynamics shape ecosystems.

Dr. Liv Herdman started working for the USGS in 2015 as a hydrodynamic modeler to develop and improve the Coastal Storm Modeling System which predicts storm driven flooding (from storm-surge, waves and fluvial discharges) along the west coast of the United States. Her primary focus has been on operationalizing the modeling system and allowing real time connections to National Weather Service products including the National Water Model and creating short term flood forecasting products for the San Francisco Bay Estuary. 

Prior to this work Liv has investigated circulation in Lake Champlain, temperature dynamics in the Sacramento River Delta, and circulation in coral reefs. In general she is interested in problems where the environmental physics play an important role in shaping ecosystem health, including the human ecosystem and the necessary planning for preventing floods

Professional Experience

  • New York Water Science Center in 2019-Present

  • Pacific Coastal Marine Science Center  2015-2019

  • Fulbright Scholar University of Waterloo, Canada, 2015

  • Postdoctoral Scholar at Stanford University, 2014

  • Postdoctoral Scholar at University of Vermont 2012-2014

Education and Certifications

  • PhD. – Civil and Environmental Engineering, Stanford University, 2012

  • B.S. – Environmental Engineering Science, University of California, Berkeley 2004

Science and Products

Flooded portion of a street near the Wading River after a winter storm.

Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Compound flooding is flooding that results from a co-occurrence of multiple flood drivers. In this project we consider precipitation (pluvial flooding, overland flow of stormwater), coastal storm surge and tidal flooding (coastal flooding), and flooding that occurs as a shallow water table intersects the land surface or critical infrastructure (groundwater emergence flooding). These flooding...
By
Water Resources Mission Area, New York Water Science Center
Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Compound flooding is flooding that results from a co-occurrence of multiple flood drivers. In this project we consider precipitation (pluvial flooding, overland flow of stormwater), coastal storm surge and tidal flooding (coastal flooding), and flooding that occurs as a shallow water table intersects the land surface or critical infrastructure (groundwater emergence flooding). These flooding...
Learn More

Supporting Datasets and R Code for Compound Flood Hazard Modeling in the New York–Long Island Sound Region (ver. 2.0, May 2026) Supporting Datasets and R Code for Compound Flood Hazard Modeling in the New York–Long Island Sound Region (ver. 2.0, May 2026)

This data release includes a shapefile of compound flood hazard scores and the associated input data, scripts, and a sample output file necessary for calculating rain-surge return period adjustments for Long Island Sound and its surrounding areas. The raw input data and imputation scripts are included in this data release and are located in the "Imputation and data compilation.zip"...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Geospatial Dataset of Coastal Inundation Maps for Long Island, NY and Long Island Sound (CT/NY) Geospatial Dataset of Coastal Inundation Maps for Long Island, NY and Long Island Sound (CT/NY)

This data release contains shapefiles and raster data of spatially distributed water level inundation, water depth, wave discharge and a set of hazard ranks for water levels, waves, and a combination of both for coastal areas of Long Island, NY and Long Island Sound. Water inundation and depth data include both current and future projections of inundation based on 4 annual exceedance...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Geospatial Datasets of Factors Influencing Pluvial Flood Potential in Long Island, New York and Near Coastal Areas Surrounding Long Island Sound in New York, Connecticut, and Rhode Island Geospatial Datasets of Factors Influencing Pluvial Flood Potential in Long Island, New York and Near Coastal Areas Surrounding Long Island Sound in New York, Connecticut, and Rhode Island

This data release provides spatial digital data for factors that influence pluvial flood hazard potential, including closed depressions, curve number, drainage networks, topographic slope, average annual rainfall, 1-hr and 24-hour 100-year return period rainfall accumulation, and locations of recorded floods. In addition, these flood influencing factors are summarized to a common 900...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Ocean wave time-series data simulated with a global-scale numerical wave model under the influence of historical and projected CMIP6 wind and sea ice fields (ver. 2.0, October 2024) Ocean wave time-series data simulated with a global-scale numerical wave model under the influence of historical and projected CMIP6 wind and sea ice fields (ver. 2.0, October 2024)

Hourly time-series of waves at the 20m, 50m, and 100m isobaths, along all U.S. open coasts for the historical (1979-2014) and projected (2020-2050) period: Those data (estimates of historical and long-term future conditions) were developed by running the National Oceanic and Atmospheric Administration's (NOAA) WaveWatch3 wave model forced with winds and sea ice extents from four separate...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities

Hydrodynamic model of the San Francisco Bay and Delta, California Hydrodynamic model of the San Francisco Bay and Delta, California

A two-dimensional hydrodynamic model of the San Francisco Bay and Delta was constructed using the Delft3D Flexible Mesh (DFM) modeling suite (www.deltares.nl/en/software/delft3d-flexible-mesh-suite/) to simulate water levels. Required model input files are provided to run the model for the time period from October 1, 2018, to April 30, 2019. This data release describes the construction...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Filter Total Items: 13

Hazard potential of compound flooding from rainfall, storm surge, and groundwater in coastal New York and Connecticut Hazard potential of compound flooding from rainfall, storm surge, and groundwater in coastal New York and Connecticut

Compound flood events, the co-occurrence of multiple flood drivers, can result in flood hazard potential exceeding that of any single driver alone. To evaluate compound flooding in a semi-urbanized coastal area, historical records dating back to 1970 are used to study the co-occurrences of high precipitation, storm surge, and shallow groundwater conditions along the coastlines of New...
Authors
Robin L. Glas, Liv M. Herdman, Salme Ellen Cook, Archi Howlader, Kristina Kirkyla Masterson
By
New York Water Science Center

Present and future coastal flooding hazard for Long Island, NY and Long Island Sound (NY/CT), USA Present and future coastal flooding hazard for Long Island, NY and Long Island Sound (NY/CT), USA

Coastal flooding and the associated damages due to storms are increasing with sea level rise around the world, with regional variability in the severity of impacts., Researchers and resource managers need to better understand and predict the future shifts in coastal flooding due to these processes to plan for resilient and sustainable communities. Here we present an analysis of long-term
Authors
Salme Ellen Cook, Liv M. Herdman
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

A spatial analysis of the groundwater emergence flood hazard in Long Island, New York and near coastal areas surrounding Long Island Sound in New York, Connecticut, and Rhode Island A spatial analysis of the groundwater emergence flood hazard in Long Island, New York and near coastal areas surrounding Long Island Sound in New York, Connecticut, and Rhode Island

Long Island, New York and near coastal areas surrounding Long Island Sound are densely populated and, like other coastal areas, are susceptible to flooding from several potential sources, including stormwater from precipitation events, tidal flooding and storm surge, and groundwater inundation or groundwater emergence flooding. The latter refers to the intersection of a rising water...
Authors
Kristina Kirkyla Masterson, Robert J. Welk, Janet R. Barclay, Kalle Jahn, Liv M. Herdman
By
New York Water Science Center

Unlearning Racism in Geoscience (URGE): Summary of U.S. Geological Survey URGE pod deliverables Unlearning Racism in Geoscience (URGE): Summary of U.S. Geological Survey URGE pod deliverables

The U.S. Geological Survey (USGS) is in a unique position to be a leader in diversity, equity, inclusion, and accessibility in the Earth sciences. As one of the largest geoscience employers, the USGS wields significant community influence and has a responsibility to adopt and implement robust, unbiased policies so that the science it is charged to deliver is better connected to the...
Authors
Matthew C. Morriss, Eleanour Snow, Jennifer L. Miselis, William F. Waite, Katherine R. Barnhart, Andria P. Ellis, Liv M. Herdman, Seth C. Moran, Annie L. Putman, Nadine G. Reitman, Wendy K. Stovall, Meagan J. Eagle, Stephen C. Phillips
By
St. Petersburg Coastal and Marine Science Center

Advanced quantitative precipitation information: Improving monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay area Advanced quantitative precipitation information: Improving monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay area

Advanced Quantitative Precipitation Information (AQPI) is a synergistic project that combines observations and models to improve monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay Area. As an experimental system, AQPI leverages more than a decade of research, innovation, and implementation of a statewide, state-of-the-art network of...
Authors
Robert Cifelli, V Chandrasekar, Liv M. Herdman, Dave Turner, A. B. White, M. Alcott, M. C. Anderson, Patrick L. Barnard, S.K. Biswas, M. Boucher, J. Bytheway, H. Chen, H. Cutler, M. English, Li H. Erikson, F. Junyent, L. E. Johnson, J. Krebs, J. van de Lindt, J. Kim, Marty L. Leonard, Y. Ma, M. Marquis, W. Moninger, G. Pratt, C. Radhakrishnan, Michael Shields, J. Spaulding, Babak Tehranirad, R. S. Webb
By
Pacific Coastal and Marine Science Center

Managing water resources on Long Island, New York, with integrated, multidisciplinary science Managing water resources on Long Island, New York, with integrated, multidisciplinary science

Nutrients, harmful algal blooms, and synthetic chemicals like per- and polyfluoroalkyl substances (PFAS) and 1,4-dioxane threaten Long Island’s water resources by affecting the quality of drinking water and ecologically sensitive habitats that support the diverse wildlife throughout the island. Understanding the occurrence, fate, and transport of these potentially harmful chemicals is...
Authors
Robert F. Breault, John P. Masterson, Christopher Schubert, Liv M. Herdman
By
Water Resources Mission Area, New York Water Science Center

Drivers of extreme water levels in a large, urban, high-energy coastal estuary – A case study of the San Francisco Bay Drivers of extreme water levels in a large, urban, high-energy coastal estuary – A case study of the San Francisco Bay

Reliable and long-term hindcast data of water levels are essential in quantifying return period and values of extreme water levels. In order to inform design decisions on a local flood control district level, process-based numerical modeling has proven an essential tool to provide the needed temporal and spatial coverage for different extreme value analysis methods. To determine the...
Authors
Cornelis M. Nederhoff, Rohin Saleh, Babak Tehranirad, Liv M. Herdman, Li H. Erikson, Patrick L. Barnard, Mick Van der Wegen
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Assessment of flood forecast products for a coupled tributary-Coastal model Assessment of flood forecast products for a coupled tributary-Coastal model

Compound flooding, resulting from a combination of riverine and coastal processes, is a complex but important hazard to resolve along urbanized shorelines in the vicinity of river mouths. However, inland flooding models rarely consider oceanographic conditions, and vice versa for coastal flood models. Here, we describe the development of an operational, integrated coastal-watershed...
Authors
Robert Cifelli, Lynn E. Johnson, Jungho Kim, Tim Coleman, Greg Pratt, Liv M. Herdman, Rosanne C. Martyr-Koller, Juliette Finzi-Hart, Li H. Erikson, Patrick L. Barnard, Michael Anderson
By
Water Resources Mission Area, Coastal and Marine Hazards and Resources Program, New York Water Science Center, Pacific Coastal and Marine Science Center

Effect of fluvial discharges and remote non-tidal residuals on compound flood forecasting in San Francisco Bay Effect of fluvial discharges and remote non-tidal residuals on compound flood forecasting in San Francisco Bay

Accurate and timely flood forecasts are critical for making emergency-response decisions regarding public safety, infrastructure operations, and resource allocation. One of the main challenges for coastal flood forecasting systems is a lack of reliable forecast data of large-scale oceanic and watershed processes and the combined effects of multiple hazards, such as compound flooding at...
Authors
Babak Tehranirad, Liv M. Herdman, Kees Nederhoff, Li H. Erikson, Rob Cifelli, Greg Pratt, Michael Leon, Patrick L. Barnard
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Storm surge propagation and flooding in small tidal rivers during events of mixed coastal and fluvial influence Storm surge propagation and flooding in small tidal rivers during events of mixed coastal and fluvial influence

The highly urbanized estuary of San Francisco Bay is an excellent example of a location susceptible to flooding from both coastal and fluvial influences. As part of developing a forecast model that integrates fluvial and oceanic drivers, a case study of the Napa River and its interactions with the San Francisco Bay was performed. For this application we utilize Delft3D-FM, a hydrodynamic...
Authors
Liv M. Herdman, Li H. Erikson, Patrick L. Barnard
By
Pacific Coastal and Marine Science Center

The influence of sea level rise on the regional interdependence of coastal infrastructure The influence of sea level rise on the regional interdependence of coastal infrastructure

Sea level rise (SLR) is placing both immediate and long‐term pressures on coastal communities to take protective actions. Projects in the United States, and in many locations throughout the world, generally involve local jurisdictions raising the elevation of shoreline protection elements, with limited or no analysis of the feedback between shoreline management decisions and the impacts...
Authors
Ruo-Quian Wang, Mark T. Stacey, Liv M. Herdman, Patrick L. Barnard, Li H. Erikson
By
Pacific Coastal and Marine Science Center

Behavior of a wave-driven buoyant surface jet on a coral reef Behavior of a wave-driven buoyant surface jet on a coral reef

A wave-driven surface buoyant jet exiting a coral reef was studied in order to quantify the amount of water re-entrained over the reef crest. Both moored observations and Lagrangian drifters were used to study the fate of the buoyant jet. To investigate in detail the effects of buoyancy and along-shore flow variations, we developed an idealized numerical model of the system. Consistent...
Authors
Liv M. Herdman, James L. Hench, Oliver Fringer, Stephen G. Monismith
By
Pacific Coastal and Marine Science Center
Advanced Quantitative Precipitation Information System Enhances Flood Prediction in San Francisco Bay Area

Advanced Quantitative Precipitation Information System Enhances Flood Prediction in San Francisco Bay Area

In recently published research, a consortium of local, state, and federal agencies including USGS and NOAA introduces the Advanced Quantitative...

Read Article
Understanding Compound Flood Hazards Understanding Compound Flood Hazards
Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

A poster presenting the interactive online web application on the Compound Flood Hazards topic

By
New York Water Science Center
Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

A poster presenting the interactive online web application on the Compound Flood Hazards topic

By
New York Water Science Center

Science and Products

Flooded portion of a street near the Wading River after a winter storm.

Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Compound flooding is flooding that results from a co-occurrence of multiple flood drivers. In this project we consider precipitation (pluvial flooding, overland flow of stormwater), coastal storm surge and tidal flooding (coastal flooding), and flooding that occurs as a shallow water table intersects the land surface or critical infrastructure (groundwater emergence flooding). These flooding...
By
Water Resources Mission Area, New York Water Science Center
Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Regional Assessment of Compound Flood Hazard from the Combined Effects of Coastal, Stormwater and Groundwater Emergence Flooding

Compound flooding is flooding that results from a co-occurrence of multiple flood drivers. In this project we consider precipitation (pluvial flooding, overland flow of stormwater), coastal storm surge and tidal flooding (coastal flooding), and flooding that occurs as a shallow water table intersects the land surface or critical infrastructure (groundwater emergence flooding). These flooding...
Learn More

Supporting Datasets and R Code for Compound Flood Hazard Modeling in the New York–Long Island Sound Region (ver. 2.0, May 2026) Supporting Datasets and R Code for Compound Flood Hazard Modeling in the New York–Long Island Sound Region (ver. 2.0, May 2026)

This data release includes a shapefile of compound flood hazard scores and the associated input data, scripts, and a sample output file necessary for calculating rain-surge return period adjustments for Long Island Sound and its surrounding areas. The raw input data and imputation scripts are included in this data release and are located in the "Imputation and data compilation.zip"...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Geospatial Dataset of Coastal Inundation Maps for Long Island, NY and Long Island Sound (CT/NY) Geospatial Dataset of Coastal Inundation Maps for Long Island, NY and Long Island Sound (CT/NY)

This data release contains shapefiles and raster data of spatially distributed water level inundation, water depth, wave discharge and a set of hazard ranks for water levels, waves, and a combination of both for coastal areas of Long Island, NY and Long Island Sound. Water inundation and depth data include both current and future projections of inundation based on 4 annual exceedance...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Geospatial Datasets of Factors Influencing Pluvial Flood Potential in Long Island, New York and Near Coastal Areas Surrounding Long Island Sound in New York, Connecticut, and Rhode Island Geospatial Datasets of Factors Influencing Pluvial Flood Potential in Long Island, New York and Near Coastal Areas Surrounding Long Island Sound in New York, Connecticut, and Rhode Island

This data release provides spatial digital data for factors that influence pluvial flood hazard potential, including closed depressions, curve number, drainage networks, topographic slope, average annual rainfall, 1-hr and 24-hour 100-year return period rainfall accumulation, and locations of recorded floods. In addition, these flood influencing factors are summarized to a common 900...
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

Ocean wave time-series data simulated with a global-scale numerical wave model under the influence of historical and projected CMIP6 wind and sea ice fields (ver. 2.0, October 2024) Ocean wave time-series data simulated with a global-scale numerical wave model under the influence of historical and projected CMIP6 wind and sea ice fields (ver. 2.0, October 2024)

Hourly time-series of waves at the 20m, 50m, and 100m isobaths, along all U.S. open coasts for the historical (1979-2014) and projected (2020-2050) period: Those data (estimates of historical and long-term future conditions) were developed by running the National Oceanic and Atmospheric Administration's (NOAA) WaveWatch3 wave model forced with winds and sea ice extents from four separate...
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center, Supplemental Appropriations for Disaster Recovery Activities

Hydrodynamic model of the San Francisco Bay and Delta, California Hydrodynamic model of the San Francisco Bay and Delta, California

A two-dimensional hydrodynamic model of the San Francisco Bay and Delta was constructed using the Delft3D Flexible Mesh (DFM) modeling suite (www.deltares.nl/en/software/delft3d-flexible-mesh-suite/) to simulate water levels. Required model input files are provided to run the model for the time period from October 1, 2018, to April 30, 2019. This data release describes the construction...
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center
Filter Total Items: 13

Hazard potential of compound flooding from rainfall, storm surge, and groundwater in coastal New York and Connecticut Hazard potential of compound flooding from rainfall, storm surge, and groundwater in coastal New York and Connecticut

Compound flood events, the co-occurrence of multiple flood drivers, can result in flood hazard potential exceeding that of any single driver alone. To evaluate compound flooding in a semi-urbanized coastal area, historical records dating back to 1970 are used to study the co-occurrences of high precipitation, storm surge, and shallow groundwater conditions along the coastlines of New...
Authors
Robin L. Glas, Liv M. Herdman, Salme Ellen Cook, Archi Howlader, Kristina Kirkyla Masterson
By
New York Water Science Center

Present and future coastal flooding hazard for Long Island, NY and Long Island Sound (NY/CT), USA Present and future coastal flooding hazard for Long Island, NY and Long Island Sound (NY/CT), USA

Coastal flooding and the associated damages due to storms are increasing with sea level rise around the world, with regional variability in the severity of impacts., Researchers and resource managers need to better understand and predict the future shifts in coastal flooding due to these processes to plan for resilient and sustainable communities. Here we present an analysis of long-term
Authors
Salme Ellen Cook, Liv M. Herdman
By
New York Water Science Center, USGS Science in Long Island Sound and its Watershed

A spatial analysis of the groundwater emergence flood hazard in Long Island, New York and near coastal areas surrounding Long Island Sound in New York, Connecticut, and Rhode Island A spatial analysis of the groundwater emergence flood hazard in Long Island, New York and near coastal areas surrounding Long Island Sound in New York, Connecticut, and Rhode Island

Long Island, New York and near coastal areas surrounding Long Island Sound are densely populated and, like other coastal areas, are susceptible to flooding from several potential sources, including stormwater from precipitation events, tidal flooding and storm surge, and groundwater inundation or groundwater emergence flooding. The latter refers to the intersection of a rising water...
Authors
Kristina Kirkyla Masterson, Robert J. Welk, Janet R. Barclay, Kalle Jahn, Liv M. Herdman
By
New York Water Science Center

Unlearning Racism in Geoscience (URGE): Summary of U.S. Geological Survey URGE pod deliverables Unlearning Racism in Geoscience (URGE): Summary of U.S. Geological Survey URGE pod deliverables

The U.S. Geological Survey (USGS) is in a unique position to be a leader in diversity, equity, inclusion, and accessibility in the Earth sciences. As one of the largest geoscience employers, the USGS wields significant community influence and has a responsibility to adopt and implement robust, unbiased policies so that the science it is charged to deliver is better connected to the...
Authors
Matthew C. Morriss, Eleanour Snow, Jennifer L. Miselis, William F. Waite, Katherine R. Barnhart, Andria P. Ellis, Liv M. Herdman, Seth C. Moran, Annie L. Putman, Nadine G. Reitman, Wendy K. Stovall, Meagan J. Eagle, Stephen C. Phillips
By
St. Petersburg Coastal and Marine Science Center

Advanced quantitative precipitation information: Improving monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay area Advanced quantitative precipitation information: Improving monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay area

Advanced Quantitative Precipitation Information (AQPI) is a synergistic project that combines observations and models to improve monitoring and forecasts of precipitation, streamflow, and coastal flooding in the San Francisco Bay Area. As an experimental system, AQPI leverages more than a decade of research, innovation, and implementation of a statewide, state-of-the-art network of...
Authors
Robert Cifelli, V Chandrasekar, Liv M. Herdman, Dave Turner, A. B. White, M. Alcott, M. C. Anderson, Patrick L. Barnard, S.K. Biswas, M. Boucher, J. Bytheway, H. Chen, H. Cutler, M. English, Li H. Erikson, F. Junyent, L. E. Johnson, J. Krebs, J. van de Lindt, J. Kim, Marty L. Leonard, Y. Ma, M. Marquis, W. Moninger, G. Pratt, C. Radhakrishnan, Michael Shields, J. Spaulding, Babak Tehranirad, R. S. Webb
By
Pacific Coastal and Marine Science Center

Managing water resources on Long Island, New York, with integrated, multidisciplinary science Managing water resources on Long Island, New York, with integrated, multidisciplinary science

Nutrients, harmful algal blooms, and synthetic chemicals like per- and polyfluoroalkyl substances (PFAS) and 1,4-dioxane threaten Long Island’s water resources by affecting the quality of drinking water and ecologically sensitive habitats that support the diverse wildlife throughout the island. Understanding the occurrence, fate, and transport of these potentially harmful chemicals is...
Authors
Robert F. Breault, John P. Masterson, Christopher Schubert, Liv M. Herdman
By
Water Resources Mission Area, New York Water Science Center

Drivers of extreme water levels in a large, urban, high-energy coastal estuary – A case study of the San Francisco Bay Drivers of extreme water levels in a large, urban, high-energy coastal estuary – A case study of the San Francisco Bay

Reliable and long-term hindcast data of water levels are essential in quantifying return period and values of extreme water levels. In order to inform design decisions on a local flood control district level, process-based numerical modeling has proven an essential tool to provide the needed temporal and spatial coverage for different extreme value analysis methods. To determine the...
Authors
Cornelis M. Nederhoff, Rohin Saleh, Babak Tehranirad, Liv M. Herdman, Li H. Erikson, Patrick L. Barnard, Mick Van der Wegen
By
Natural Hazards Mission Area, Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Assessment of flood forecast products for a coupled tributary-Coastal model Assessment of flood forecast products for a coupled tributary-Coastal model

Compound flooding, resulting from a combination of riverine and coastal processes, is a complex but important hazard to resolve along urbanized shorelines in the vicinity of river mouths. However, inland flooding models rarely consider oceanographic conditions, and vice versa for coastal flood models. Here, we describe the development of an operational, integrated coastal-watershed...
Authors
Robert Cifelli, Lynn E. Johnson, Jungho Kim, Tim Coleman, Greg Pratt, Liv M. Herdman, Rosanne C. Martyr-Koller, Juliette Finzi-Hart, Li H. Erikson, Patrick L. Barnard, Michael Anderson
By
Water Resources Mission Area, Coastal and Marine Hazards and Resources Program, New York Water Science Center, Pacific Coastal and Marine Science Center

Effect of fluvial discharges and remote non-tidal residuals on compound flood forecasting in San Francisco Bay Effect of fluvial discharges and remote non-tidal residuals on compound flood forecasting in San Francisco Bay

Accurate and timely flood forecasts are critical for making emergency-response decisions regarding public safety, infrastructure operations, and resource allocation. One of the main challenges for coastal flood forecasting systems is a lack of reliable forecast data of large-scale oceanic and watershed processes and the combined effects of multiple hazards, such as compound flooding at...
Authors
Babak Tehranirad, Liv M. Herdman, Kees Nederhoff, Li H. Erikson, Rob Cifelli, Greg Pratt, Michael Leon, Patrick L. Barnard
By
Coastal and Marine Hazards and Resources Program, Pacific Coastal and Marine Science Center

Storm surge propagation and flooding in small tidal rivers during events of mixed coastal and fluvial influence Storm surge propagation and flooding in small tidal rivers during events of mixed coastal and fluvial influence

The highly urbanized estuary of San Francisco Bay is an excellent example of a location susceptible to flooding from both coastal and fluvial influences. As part of developing a forecast model that integrates fluvial and oceanic drivers, a case study of the Napa River and its interactions with the San Francisco Bay was performed. For this application we utilize Delft3D-FM, a hydrodynamic...
Authors
Liv M. Herdman, Li H. Erikson, Patrick L. Barnard
By
Pacific Coastal and Marine Science Center

The influence of sea level rise on the regional interdependence of coastal infrastructure The influence of sea level rise on the regional interdependence of coastal infrastructure

Sea level rise (SLR) is placing both immediate and long‐term pressures on coastal communities to take protective actions. Projects in the United States, and in many locations throughout the world, generally involve local jurisdictions raising the elevation of shoreline protection elements, with limited or no analysis of the feedback between shoreline management decisions and the impacts...
Authors
Ruo-Quian Wang, Mark T. Stacey, Liv M. Herdman, Patrick L. Barnard, Li H. Erikson
By
Pacific Coastal and Marine Science Center

Behavior of a wave-driven buoyant surface jet on a coral reef Behavior of a wave-driven buoyant surface jet on a coral reef

A wave-driven surface buoyant jet exiting a coral reef was studied in order to quantify the amount of water re-entrained over the reef crest. Both moored observations and Lagrangian drifters were used to study the fate of the buoyant jet. To investigate in detail the effects of buoyancy and along-shore flow variations, we developed an idealized numerical model of the system. Consistent...
Authors
Liv M. Herdman, James L. Hench, Oliver Fringer, Stephen G. Monismith
By
Pacific Coastal and Marine Science Center
Advanced Quantitative Precipitation Information System Enhances Flood Prediction in San Francisco Bay Area

Advanced Quantitative Precipitation Information System Enhances Flood Prediction in San Francisco Bay Area

In recently published research, a consortium of local, state, and federal agencies including USGS and NOAA introduces the Advanced Quantitative...

Read Article
Understanding Compound Flood Hazards Understanding Compound Flood Hazards
Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

A poster presenting the interactive online web application on the Compound Flood Hazards topic

By
New York Water Science Center
Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

Understanding Compound Flood Hazards

A poster presenting the interactive online web application on the Compound Flood Hazards topic

By
New York Water Science Center
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