Patrick Lynett

Patrick Lynett
University of Southern California | USC · Department of Civil and Environmental Engineering

PhD

About

189
Publications
43,838
Reads
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4,863
Citations
Introduction
Prof. Lynett's research interests are directed towards a better understanding of coastal processes, such as nearshore circulations, wave evolution from generation to the shoreline, multi-scale hydrodynamic interactions, and sediment transport. Investigations combine numerical modeling with both controlled experiments and field observations. Short time-scale coastal hazards, such as hurricanes and tsunamis, are of particular interest.
Additional affiliations
August 2015 - June 2016
University of Southern California
Position
  • Professor
August 2002 - August 2011
Texas A&M University
Position
  • Professor (Associate)
Education
August 1998 - August 2002
Cornell University
Field of study
  • Civil Engineering
August 1997 - May 1998
Cornell University
Field of study
  • Civil Engineering
August 1993 - May 1997
Cornell University
Field of study
  • Civil Engineering

Publications

Publications (189)
Article
link to the full text - https://authors.elsevier.com/a/1dV9N_hNWiWkO This paper describes a model developed to predict the general behavior of large vessels under energetic tsunami conditions using established regional-scale tsunami models. The methodology is based on a two-way coupled approach to account for the interaction between vessels and fl...
Article
Free access link to the full text (until the 15th October): https://authors.elsevier.com/a/1deTK1M2DVCpD9 Harbour resonance and its contribution to wave overtopping are examined for a small irregular–shaped harbour in the eastern Mediterranean. Offshore wave measurements are used to determine the incident wave conditions during storm events. Reson...
Data
Testing took place from January to June 2019 and included natural and built environment tests with an emphasis on obtaining loading data for a 10x10 array of structures in the inundation zone. Bare earth tests were conducted first to get baseline velocity and wave height data. Then, the array of structures was added to the inundation zone. In addit...
Article
Full-text available
We develop the third-order adaptive Adams-Bashforth time integration and the second-order finite difference equation for variable time steps. We incorporate these schemes in the Celeris Advent software to discretize and solve the 2D extended Boussinesq equations. This software uses a hybrid finite volume – finite difference scheme and leverages the...
Article
Since the 2006 Kuril Islands tsunami, California small craft marinas have sustained over $100 million in total damage from tsunami events. Surveys conducted after the 2006 Kuril Islands and 2011 Japan tsunamis indicated that the mooring systems (e.g., cleats and pile guides) responsible for keeping the vessels and floating docks in place during an...
Article
Full-text available
The time series of free surface elevation measured in and outside the shadow zone were compared and analyzed in the time-frequency domain by employing the continuous wavelet transform. Regardless of the conditions of the ERF wave in the shadow zone, an increase in magnitude of energy is noticeable not only in the peak frequency within a range of ap...
Article
Full-text available
For many practical and theoretical purposes, various types of tsunami wave models have been developed and utilized so far. Some distinction among them can be drawn based on governing equations used by the model. Shallow water equations and Boussinesq equations are probably most typical ones among others since those are computationally efficient and...
Article
Full-text available
This paper describes a two-dimensional scalar transport model solving advection-diffusion equation based on GPU-accelerated Boussinesq model called Celeris. Celeris is the firstly-developed Boussinesq-type model that is equipped with an interactive system between user and computing unit. Celeris provides greatly advantageous user-interface that one...
Article
Full-text available
Rising seas, tropical cyclones, and tsunamis threaten increasingly populated coastal areas, leaving coastal communities searching for sustainable, resilient adaptation solutions to mitigate the impacts of chronic and acute coastal flood hazards. This work specifically investigates parcel-scale effects of the Rhizophora mangle (red mangrove) species...
Article
Full-text available
Inundation from storms like Hurricanes Katrina and Sandy, and the 2011 East Japan tsunami, have caused catastrophic damage to coastal communities. Prediction of surge, wave, and tsunami flow transformation over the built and natural environment is essential in determining survival and failure of near-coast structures. However, unlike earthquake and...
Article
Full-text available
During tropical cyclones, processes including dune erosion, overwash, inundation, and storm-surge ebb can rapidly reshape barrier islands, thereby increasing coastal hazards and flood exposure inland. Relatively few measurements are available to evaluate the physical processes shaping coastal systems close to shore during these extreme events as it...
Article
Full-text available
Large (km-scale) mangrove forests can provide protection to shorelines and near-coast structures during extreme coastal flood events, including tsunamis and tropical cyclones. However, little is known about the effects of mangroves with a modest cross-shore thickness (∼10 – 50 m), on flow hydrodynamics and resulting inland pressures and forces on n...
Article
Full-text available
Plain Language Summary Climate warming and the resulting retreat of glaciers may destabilize mountain slopes, triggering landslides. For those landslides that enter fjords, the induced tsunamis are a significant hazard to coastal communities. Despite this risk, most periglacial landslides have been detected only after the event. Using satellite dat...
Article
Full-text available
Category 5 Hurricane Michael made landfall near Mexico Beach, Florida on October 9, 2018, with measured high water marks (HWMs) reaching 7.2 m NAVD88. The town itself received great damage, with many areas destroyed down to the foundations. In this study, we document the storm and its effects on the greater Mexico Beach area: hazard, structural dam...
Article
This work describes a phase-resolving wave-forecasting algorithm that is based on the assimilation of marine radar image time series. The algorithm is tested against synthetic data and field observations. The algorithm couples X-band marine radar observations with a phase-resolving wave model that uses the linear mild slope equations for reconstruc...
Article
Full-text available
On December 22, 2018, the eruption and flank collapse of the Anak Krakatau volcano generated a tsunami in the Sunda Strait causing catastrophic damage to uninhabited coastlines proximal to the source. Along the heavily populated shores of Banten and Lampung provinces in Java and Sumatra, tsunami waves caused severe damage, extensive inundation and...
Article
In this paper, a set of models responsible for hydrodynamics, sediment transport, and morphological evolution are introduced with their theoretical backgrounds, and it is explained how they are fully connected through a two‐way coupling to yield an integrated sediment transport model applicable to tsunami cases. In particular, a fully‐nonlinear Bou...
Article
We investigated, from two laboratory experiments, the kinematic behavior and the three-dimensional turbulence that is generated due to a breaking solitary wave propagating over irregular shallow water bathymetry. The bathymetry was composed of a deep water region followed by a shallow shelf via a relatively steep slope. The offshore boundary of the...
Conference Paper
Full-text available
Coastal communities are challenged to develop sustainable adaptations to mitigate hazards associated with rising seas and intensifying storms. Based on field and laboratory studies, we quantified parcel-scale benefits of mangrove shorelines, building on observations of mangrove protection of near-shore residential infrastructure in the Florida Keys...
Preprint
Full-text available
We develop the third-order adaptive Adams-Bashforth time stepping scheme and the second-order finite difference discretization equation for variable time steps. We incorporate these schemes in the Celeris Advent software to discretize and solve the extended Boussinesq equations. This software uses a hybrid finite volume - finite difference scheme a...
Article
Full-text available
We introduce our interactive and immersive coastal wave simulation software, Celeris Base, which is the successor to Celeris Advent. Celeris Base is an open source software developed in the Unity3D game engine and in C# language. It supports an interactive environment and allows users to view the simulations in a virtual reality headset. Celeris Ba...
Article
Full-text available
https://www.nps.gov/articles/aps-18-1-2.htm
Article
Full-text available
Following the 2010 Mentawai tsunami, observations in Sumatra by Hill et al. (J Geophys Res Solid Earth, 2012. https://doi.org/10.1029/2012jb009159) noted enhanced tsunami runup in coastal areas behind island chains. Many local communities in the region, however, falsely believed that islands provide shelter against tsunami waves. The present study...
Technical Report
Full-text available
This report is a product of the NSF NHERI SimCenter and provides an overview and review of simulation requirements and software tools for natural hazards engineering of the built environment. The simulations discussed in this report are an essential component of research to address the three grand challenge areas and associated research questions o...
Conference Paper
Full-text available
Recent studies and observations suggest that small islands near the mainland do not offer protection against tsunamis and may in fact amplify the run-up. The goal of this study was to better understand how the combined effect of small islands and reefs affects tsunamis runup on a planar beach. Optical measurements were carried out to study the run-...
Conference Paper
Full-text available
The focus of the discussion will be on the debris and vessel transport capacity of the tsunami induced currents in ports and harbors. The tsunami events in the past 15 years proved that understanding these processes within the port/harbor basin has paramount importance in safety, recovery and the long-term resilience planning of the facilities; as...
Article
Full-text available
In this presentation, we will discuss the development and application of a GPU-based Boussinesq-type wave model. The novelty of this approach is that it is meant to serve the primary purpose of being interactive – allowing the user to modify the boundary conditions and model parameters as the model is running, and to see the effect of these changes...
Conference Paper
Advances in computer programming have permitted researchers to predict and visualize how tsunami waves affect coastline areas. Although it’s possible to use numerical model simulations to predict the inundation of tsunamis, the process has some limitations. In order to solve the Boussinesq-type equations for tsunami propagation in the near-shore, i...
Article
There are numerous reports of large-scale "whirlpools" being generated in the near-shore during tsunami events (Borrero et al., 2015). These features, termed tsunamiincluded turbulent coherent structures (TCS), form due to flow separation at sharp coastline features. During the 2011 Tohoku tsunami, the generation of a large-scale TCS was captured a...
Article
Throughout history “sneaker” waves or “king” waves (in Australia), also referred in this study as extreme infragravity (EIG) waves, have been responsible for killing several people throughout the world. Particularly on the coast of Oregon, more than 21 people have died since the year 1990 due to this phenomenon (http://www.oregonlive.com). People t...
Article
This Proceedings contains 550 papers from the 36th International Conference on Coastal Engineering, which was held in Baltimore, Maryland from July 30 to August 3, 2018. The Proceedings is divided into six parts: Papers; Waves; Swash, Nearshore Currents, and Long Waves; Sediment Transport and Morphology; Coastal Structures; and Coastal Management,...
Conference Paper
Small craft harbors are important facets to many coastal communities providing a transition from land to ocean. Because of the damage resulting from the 2010 Chile and 2011 Japanese tele-tsunamis, the tsunami risk to the small craft harbors in California has become an important concern. However, tsunamis represent only one of many hazards a harbor...
Article
This paper presents long wave run-ups and rundowns on a bi-linear slope beach detected by using an image processing technique. For long wave run-ups, solitary wave run-up is obtained through experimental tests by Hydraulic-Control Wave-maker (HCW) and the dataset are validated by comparing Open-Source field Operation and Manipulation (OpenFOAM) wit...
Poster
Full-text available
2018 AGU Fall Meeting Washington, D.C., 10-14 Dec. 2018
Article
Recent observations of energetic infragravity (IG) flooding events, such as those in the Philippines during Typhoon Haiyan, suggest that IG surges may approach the coast as breaking bores with periods of minutes: a very tsunami-like characteristic. Energetic IG waves have been observed in various locations around the world and have led to loss of l...
Article
Full-text available
Glacial retreat in recent decades has exposed unstable slopes and allowed deep water to extend beneath some of those slopes. Slope failure at the terminus of Tyndall Glacier on 17 October 2015 sent 180 million tons of rock into Taan Fiord, Alaska. The resulting tsunami reached elevations as high as 193 m, one of the highest tsunami runups ever docu...
Article
A multiple-scale perturbation approach is implemented to solve the Navier–Stokes equations while including bottom boundary layer effects under a single wave and under two interacting waves. In this approach, fluid velocities and the pressure field are decomposed into two components: a potential component and a rotational component. In this study, t...
Article
Full-text available
Following the recent unexpected earthquake events of 2004 and 2011, it can be cautiously extrapolated that all major subduction zones bearing the capacity to produce mega-earthquake events will eventually do so given enough time, irrespective of the lack of such in the relatively short historical record. This notion has led to an effort of assignin...
Article
This paper applies a simple energy method to predict characteristics of overland tsunami flows based on extrapolation of the energy grade line between the shoreline and the tsunami run-up limit. Starting with a mapped run-up or inundation limit from tsunami hazard maps or from field surveys, the method reconstructs maximum inundation depths and vel...
Conference Paper
Here, we present the results of a numerical modeling study to investigate how the maxima of the tsunami-induced currents vary due to dynamic effects of tides and wave directivity. A sensitivity analyses was conducted in three harbors by coupling the tsunami with the tide signal at twelve different tide levels. We find that tsunami-tide interaction...
Article
As a result of damage from the 2010 Chile and 2011 Japanese teletsunamis, the tsunami risk to the small craft marinas in California has become an important concern. This paper outlines an assessment tool which can be used to assess the tsunami hazard to small craft harbors. The methodology is based on the demand and capacity of a floating dock syst...
Article
Nearshore hydrodynamics are driven by a wide spectrum of motions/scales that vary on the order of O (10) m to O (100) km. These scales have different effects on the dynamics of the nearshore areas, and capturing these effects is essential in accurately modeling the nearshore processes such as: mixing and transport of pollutants, wave steeping and/o...
Article
On March 11, 2011 the Tohoku tsunami event caused the death of thousands of people and generated billions of dollars in damages. Following this and previous tsunami events, there has been an effort to improve tsunami risk mitigation for coastal communities. Currently, numerical models are being used in a state-of-the-art methodology to estimate tsu...
Article
Full-text available
In this paper, we introduce an interactive coastal wave simulation and visualization software, called Celeris. Celeris is an open source software which needs minimum preparation to run on a Windows machine. The software solves the extended Boussinesq equations using a hybrid finite volume - finite difference method and supports moving shoreline bou...
Article
To help produce accurate and consistent maritime hazard products, the National Tsunami Hazard Mitigation Program organized a benchmarking workshop to evaluate the numerical modeling of tsunami currents. Thirteen teams of international researchers, using a set of tsunami models currently utilized for hazard mitigation studies, presented results for...
Article
As a result of damage from the 2010 Chile and 2011 Japanese teletsunamis, tsunami risk to small craft marinas along the West Coast of the United States has become an important concern. This paper outlines an assessment tool that can be used to quantify the tsunami damage potential in small craft harbors. The methodology is based on the demand and c...
Article
Full-text available
Here, we present the results of a numerical modeling study that investigates how event-maximum tsunami-induced currents vary due to the dynamic effects of tides and wave directivity. First, analyses of tide-tsunami interaction are presented in three harbors by coupling the tsunami with the tide, and allowing the initial tsunami wave to arrive at va...
Conference Paper
Full-text available
After a disaster, authorities need to efficiently collect and analyze data from the disaster area in order to increase their situational awareness and make informed decisions. The conventional data acquisition methods such as dispatching inspection teams are often time-consuming. With the widespread availability of mobile devices, crowdsourcing has...
Conference Paper
Full-text available
After a disaster, authorities need to efficiently collect and analyze data from the disaster area in order to increase their situational awareness and make informed decisions. The conventional data acquisition methods such as dispatching inspection teams are often time-consuming. With the widespread availability of mobile devices, crowdsourcing has...
Article
Full-text available
Numerical models are a key component of methodologies used to estimate tsunami risk, and model predictions are essential for the development of tsunami hazard assessments (THAs). By better understanding model bias and variability and, if possible, minimizing them, more reliable THAs will result. In this study, the authors compare run-up height, inu...
Article
Full-text available
In this paper, the challenges in simulation of tsunamiinduced currents are reviewed. Examples of tsunami dynamics in harbors, overland flow, and through urban environments are presented, with a focus on the numerical and natural variability in speed predictions. The discussion is largely aimed to show that high-confidence prediction of location-spe...
Conference Paper
Wave storms crossing the Aegean and Cretan Seas, with significant wave heights exceeding 4m, annually reach the exposed entrance of the Venetian harbor of Chania. The frequent storms are taking a toll on the aging docks, necessitating makeshift measures to prevent scouring and protect the businesses in the perimeter of the harbor. Here, we examine...
Conference Paper
As a result of damage from the 2010 Chile and 2011 Japanese teletsunamis, the tsunami risk to the small craft marinas in California has become an important concern. This paper outlines an assessment tool which can be used to assess the tsunami hazard to small craft harbors. The methodology is based on the demand and capacity of a floating dock syst...
Article
Full-text available
Many coastal areas in the United States are subject to tsunami hazard. The public safety risk has been partially mitigated through warning and preparedness of evacuation, but community disaster resilience requires that critical and essential facilities provide structural resistance to collapse. Furthermore, there are coastal communities in the stat...
Article
Full-text available
Tsunami-induced coastal currents are spectacular examples of nonlinear and chaotic phenomena. Due to their long periods, tsunamis transport substantial energy into coastal waters, and as this energy interacts with the ubiquitous irregularity of bathymetry, shear and turbulent features appear. The oscillatory character of a tsunami wave train leads...
Poster
Full-text available
A coastal wave simulation and visualization software is developed based on the Boussinesq equations. Both simulation and its concurrent visualization are performed on the GPU using DirectX API. The software provides faster than real-time, interactive modeling for the first time in coastal engineering. A model running faster than real-time can be ha...
Article
This chapter presents an overview of the available methods for modeling coastal waves. First, an overview of the relevant coastal processes, from shoaling to turbulent mixing, is provided to establish a basis to compare the various modeling approaches. The bulk of the discussion centers on modeling wind waves and includes a brief overview of the li...
Article
Full-text available
In this paper, we discuss the recent developments of our GPU-based Boussinesq-type wave simulation software, Celeris. This software is meant to serve the primary purpose of being interactive – i.e. allowing the user to modify the boundary conditions and model parameters as the model is running, and to see the effect of these changes immediately. To...
Article
Full-text available
Tsunami-induced currents present an obvious hazard to maritime activities and ports in particular. The historical record is replete with accounts from ship captains and harbour masters describing their fateful encounters with currents and surges caused by these destructive waves. Despite the well-known hazard, only since the trans-oceanic tsunamis...
Article
Full-text available
In this work a numerical study of the wave conditions induced in the old Venetian Harbor of Chania (in the island of Crete, Greece) is presented, using two models. The fully nonlinear-weakly dispersive COULWAVE code and the weakly nonlinear-weakly dispersive TUCWave code. The two models are used as to explore resonance and determine the resonant fr...