Jens Figlus

Jens Figlus
Texas A&M University | TAMU · Department of Civil Engineering

Doctor of Philosophy

About

51
Publications
29,034
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
642
Citations
Introduction
Jens Figlus currently works in the Ocean Engineering Department of Texas A&M University. Jens does research in Coastal Engineering, Barrier Island Dynamics, Wave-Structure-Sediment-Vegetation Interaction and Sediment Transport Processes.

Publications

Publications (51)
Article
Full-text available
Vegetated coastal sand dunes can be vital components of flood risk reduction schemes due to their ability to act as an erosive buffer during storm surge and wave attack. However, the effects of plant morphotypes on the wave-induced erosion process are hard to quantify, in part due to the complexity of the coupled hydrodynamic, morphodynamic, and bi...
Article
Full-text available
Coastal risk reduction features are often built to protect infrastructure and ecosystems from damaging waves, sea level rise, and shoreline erosion. Engineers often use predictive numerical modeling tools, such as Delft3D to help design optimal intervention strategies. Still, their use by coastal managers for optimizing the design of living shoreli...
Chapter
Along many of the world’s coastlines, dunes form natural sand barriers against flooding induced by storm surges and waves. They are an integral and dynamic part of the coastal geomorphology created by the continual interplay between water, wind, and sediment. Their ability to reduce flood risk by providing flexible elevation, a sacrificial volume o...
Chapter
Water can enter coastal systems and produce flooding in a variety of ways. Elevated water levels due to storm surge and wave setup, wave overtopping, runoff from heavy rain events, and increased river discharge resulting from upstream dam releases or appreciable rainfall induce flow to low-lying coastal areas with the potential to result in floodin...
Article
Infrastructure must become more resilient as the global climate changes and also more affordable in the economic and political context of a post-COVID world. We can solve this dual challenge and drive global infrastructure investment into a more sustainable direction by taking our cues from Nature.
Article
Full-text available
Vegetation is an important feature of coastal dunes and is often managed to stabilize restored dunes and provide coastal protection. Despite a high investment in planting and management efforts, little is known about how vegetation is affected by wind and wave run-up. The objectives of this study were to 1) investigate the lift forces and drag mome...
Article
Whitley, A.E.; Figlus, J.; Valsamidis, A., and Reeve, D.E., 2021. One-line modeling of mega-nourishment evolution. Journal of Coastal Research, 37(6), 12241234. Coconut Creek (Florida), ISSN 0749-0208. As many coastal areas of the world suffer from chronic erosion, innovative solutions beyond traditional local nourishment must be explored. One such...
Article
A unique set of field measurements taken along Galveston beach have been compiled to give annual shoreline positions over the period 2010–2016. These have been used, in conjunction with statistical and mathematical modelling, to gain insights into the response of the shoreline after the landfall of Hurricane Ike in 2008, which caused extensive eros...
Article
Full-text available
The fate of unconfined dredged sediment placed as a submerged "feeder" berm in the nearshore region of South Padre Island (SPI), Texas, was investigated through a particle tracer study over the duration of 15 months. Unconfined sediment feeder systems can be a desirable alternative to traditional direct beach placement of nourishment material becau...
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
Meteotsunami waves can be triggered by atmospheric disturbances accompanying tropical cyclone rainbands (TCRs) before, during, and long after a tropical cyclone makes landfall. Due to a paucity of high resolution field data along open coasts during tropical cyclones, relatively little is known about the atmospheric forcing that generate and resonan...
Preprint
Full-text available
The fate of unconfined dredged sediment placed as a submerged "feeder" berm in the nearshore region of South Padre Island (SPI), Texas, was investigated through a particle tracer study over the duration of 15 months. Unconfined sediment feeder systems like this can be a desirable alternative to traditional direct beach placement of nourishment mate...
Article
Full-text available
Infragravity (IG) waves are expected to contribute significantly to coastal flooding and sediment transport during hurricane overwash, yet the dynamics of these low-frequency waves during hurricane impact remain poorly documented and understood. This paper utilizes hydrodynamic measurements collected during Hurricane Harvey (2017) across a low-lyin...
Article
Publicly available tidal predictions for coastlines are predominantly based on astronomical predictions. In shallow water basins, however, water levels can deviate from these predictions by a factor of two or more due to wind-induced fluctuations from non-regional storms. To model and correct these wind-induced tidal deviations, a two-stage empiric...
Article
Almarshed, B.; Figlus, J.; Miller, J., and Verhagen, H.J., 0000. Innovative coastal risk reduction through hybrid design: Combining sand cover and structural defenses. Journal of Coastal Research, 00(0), 000-000. Coconut Creek (Florida), ISSN 0749-0208. Worldwide, sand dunes and hard coastal structures help to minimize loss of lives and property fr...
Article
Coastal dunes are often the first and only line of physical defense for communities subjected to damaging storms and waves. Planting vegetation on them has been proposed as one way to increase their protective capacity, but it is unknown how dune plant architecture reduces erosion. We conducted wave flume and field experiments to address this quest...
Article
Full-text available
The City of Galveston is protected from extreme storm impact by a 17-km concrete seawall facing the Gulf of Mexico. Recent studies have shown that the seawall may not be sufficient to protect against a 100-year design storm. Since raising the seawall disconnects the city from the beach and may be very costly, a hybrid approach is explored in which...
Article
Field deployment for scale model evaluation of an innovative sediment bypassing/back-passing system developing technologies to support present and future sustainable beach nourishment programs and projects on Galveston Island. This is a field scale demonstration project modeling a system designed to harvest beach quality sand using a hybrid, closed...
Article
The COAstal STorm Rapid Response (COASTRR) system has been implemented to measure hydro-dynamic, morphodynamic, and sedimentary processes occurring along coastlines during storm impact and subsequent recovery. Relatively few measurements are available to evaluate the physical processes shaping coastal systems during extreme storm events, nor to ass...
Article
Full-text available
Previously, the accretion of a slip-faced ridge and runnel (RR) system was observed during a 3-week field experiment on a steep meso-tidal engineered beach at South Bethany Beach, Delaware. Detailed measurements of wading depth beach profiles and nearbed flow velocities were obtained in the inner surf and swash zones along with offshore wave and cu...
Article
Measured post-storm beach recovery and swash velocities were simulated using the process-based, depth-averaged 1-D cross-shore numerical model CSHORE over 30 tide cycles. The field data were collected during a three-week experiment along the Delaware coast of the United States following a nor’easter storm. A pronounced ridge formed immediately afte...
Article
Full-text available
In response to numerous recent high-profile cases of tropical storm and hurricane damage to coastal communities, there has been increasing attention on the storm protection services provided by coastal ecosystems. However, substantial knowledge gaps exist regarding the quantitative economic benefits of such services, particularly for coastal vegeta...
Poster
Full-text available
Prior to landfall of Hurricane Harvey on August 25, 2017, instrumentation was deployed on the seaward and landward sides of a barrier island on the central Texas Gulf Coast to collect in-situ hydrodynamic measurements during storm impact. High-resolution devices capable of withstanding extreme conditions included inexpensive pressure transducers an...
Article
Full-text available
A field experiment was conducted on the northern Yucatan coast from April 1 to April 12, 2014 to investigate the role of intese wind events on coastal circulation from the inner shelf to the swash zone. The study area is characterized by a micro-tidal environment, low-energy wave conditions, and a wide and shallow continental shelf. Furthermore, ea...
Conference Paper
Nature-based solutions to storm protection, such as sand dune restoration and construction, are a flourishing topic in coastal engineering. A crucial aspect of developing nature-based mitigation techniques is evaluating the efficacy of these approaches (i.e., evaluating their economic value) to justify the cost of investment. The objective of this...
Conference Paper
Full-text available
Core-enhanced sand dunes are hybrid coastal defence structures that combine the storm surge protection offered by traditional hard coastal structures with the aesthetically pleasing appearance and wave energy dissipation potential of coastal sand dunes. Essentially, these are hard coastal structures covered under a sacrificial sand dune. In this st...
Conference Paper
Full-text available
Tilt current meters (TCMs) are a low-cost way of measuring stationary current velocities in coastal waters. In the nearshore environment, the combined influence of waves, wave breaking, and currents add complexity to the instrument response. This study explores the utility of TCMs in measuring near-bed flow velocities in the surf zone on a wave-dom...
Article
Follet's Island (FI) is a sediment-starved barrier island located on the Upper Texas Coast; a stretch of coastline along the Gulf of Mexico that experiences on average four hurricanes and four tropical storms per decade. During Hurricane Ike, water levels and wave heights at FI exceeded the 100-year and 40-year return values, respectively, leading...
Article
Full-text available
Gulf of Mexico (GOM) coasts have been included in the U.S. Tsunami Warning System since 2005. While the tsunami risk for the GOM is low, tsunamis generated by local submarine landslides pose the greatest potential threat, as evidenced by several large ancient submarine mass failures identified in the northern GOM basin. Given the lack of significan...
Conference Paper
Full-text available
LiDAR and bathymetric surveys were used in conjunction with aerial imagery to evaluate the impact of Hurricane Ike (2008) on Follett's Island (FI), a sediment-starved barrier island on the Upper Texas Coast (UTC). Elevations from LiDAR surveys were interpolated onto cross-shore transects, documenting the coastal response of the beach and dune syste...
Article
Full-text available
Coastlines have traditionally been engineered to maintain structural stability and to protect property from storm-related damage, but their ability to endure will be challenged over the next century. The use of vegetation to reduce erosion on ocean-facing mainland and barrier island shorelines – including the sand dunes and beaches on these islands...
Poster
Full-text available
A comprehensive field experiment devoted to the study of coastal processes on a micro-tidal beach was conducted from March 30th to April 12th 2014 in Sisal, Yucatán México. Wave conditions in the study area are controlled by local (i.e., sea-breezes) and meso-scale (i.e., Nortes) meteorological events. Simultaneous measurements of waves, tides, win...
Article
Full-text available
Coastal dune ecosystems occupy the small but highly dynamic zone at the intersection of ocean and land. Coastal dunes fulfill many different valuable ecosystem functions. They act as protective buffers against storm surge, wave attack, and erosion of the hinterland, and provide a unique habi-tat for flora and fauna. Coastal dunes also yield substan...
Conference Paper
Full-text available
Coastal dunes can protect communities and infrastructure against storm surge and wave attack. They provide a natural barrier of granular material that erodes during storm conditions and dissipates wave energy in the process. Vegetation is abundantly present in most coastal dunes and may enhance the capability of the dune to withstand erosion. Howev...
Conference Paper
Our capability for predicting beach and dune erosion has improved for the last three decades but the recovery of an eroded beach cannot be predicted at present. The cycle of beach erosion and recovery will need to be predicted for the long-term maintenance of a sand beach with a dune for coastal flooding reduction. The cross-shore numerical model C...
Article
Full-text available
The recovery of beaches after a storm can be influenced significantly by ridge-runnel migration. Ridges are made up of large volumes of sand which is important for the coastal sediment budget. The experiment described in this paper gives an insight into the complex hydrodynamics and sediment transport mechanisms related to onshore ridge-runnel migr...
Article
Full-text available
Ridge-runnel features can comprise large volumes of sand, and their migration can have a significant influence on the coastal sediment budget and beach recovery after a storm. Numerical modeling of ridge-runnel migration is challenging partly because of the strong interactions between the hydrodynamics and morphology and partly because of limited a...
Article
Full-text available
An experiment was conducted in a wave flume to examine the processes of gravel beach profile evolution under irregular waves. Two erosion tests were performed on a steep slope of 1/2 with two different significant wave heights. An accretion test was conducted on a mild slope of 1/5 until its profile became quasi-equilibrium. Another test was initia...
Article
Full-text available
Numerical modeling of the rapid dune profile changes that may occur due to wave overtopping and sediment overwash during a storm is challenging. One of the reasons is the limited amount of available field and laboratory data related to the problem. Another reason is the complex interaction of hydrodynamics, morphological changes and sediment transp...
Article
Full-text available
Wave-induced overwash of sand dunes may cause rapid profile changes and possible dune destruction, thus increasing the flood risk landward of dunes. Accurate modeling of the wave overwash processes is therefore essential in predicting dune profile evolution during overwash events. However, available field and laboratory data are very limited. We me...
Conference Paper
Full-text available
Continual erosion necessitates frequent replenishment of the nourished beaches protecting communities along the Delaware Atlantic coast. Since conventional one-line models have failed to adequately predict the beach fill performance and the evolution of the beach profiles on four Delaware beaches, longshore and cross-shore sediment transport rates...
Article
Full-text available
The additional resistance to erosion due to flows down steep slopes that can be achieved by placing rock instead of dumping randomly has been quantified during a large-scale flume investigation. Testing was undertaken for slopes of 0.2, 0.3, and 0.4 with two layers of armor overlying a filter, consistent with conventional rock protection designs. T...
Article
Full-text available
The Delaware Atlantic coast of 40 km length is suffering from beach erosion. The State of Delaware placed approximately 1,100,0001 m3 sand on its four beaches in 1998. Beach profiles were surveyed along fixed 65 cross-shore lines almost semiannually for 9-11 times until 2005. The measured profiles are analyzed to obtain the shoreline displacement a...

Network

Cited By

Projects

Projects (3)
Project
Use field observations of infragravity (0.003<f<0.04 Hz) and very low frequency (0.0004<f<0.003 Hz) waves extending from the nearshore to the back-barrier environments during Hurricane Harvey (2017) to explore the role of low-frequency motions in driving coastal change during hurricane attack. This project includes analysis of nonlinear energy transfer in the surf zone, frequency dependent characteristics of infragravity waves during storm impact, infragravity wave energy saturation, and origin of VLF waves along the upper Texas (U.S.A) coast.
Project
I'm working with Dr. Jens Figlus at Texas A&M University to develop an instrumentation array that can be rapidly deployed on a Texas barrier island (Follets Island) prior to hurricane attack. Our goal is to better characterize barrier island response to extreme storms by making field measurements of overwash/overtopping in real-time. Thus far, the array features pressure transducers and prototype tilt-current meters which I'm currently testing/validating for high oscillatory flow in the surf zone. We are also using UAVs to create pre- and post-storm elevation maps.