Felix Jose | Florida Gulf Coast University (original) (raw)

Papers by Felix Jose

Research paper thumbnail of An agent‐based model accurately predicts larval dispersal and identifies restoration and monitoring priorities for eastern oyster ( <scp> <i>Crassostrea virginica</i> </scp> ) in a Southwest Florida estuary

Restoration Ecology, Sep 8, 2021

An agent-based modelling (ABM) framework was developed to support oyster reef restoration efforts... more An agent-based modelling (ABM) framework was developed to support oyster reef restoration efforts in the Caloosahatchee River Estuary located within the encompassing Charlotte Harbor estuarine system, Southwest Florida. The modelling approach is novel for this shallow estuary which experiences heavily managed freshwater inflow known to be an ecological stressor to the estuary's oysters. The aim of the study was to (1) determine the ABM's accuracy in simulating larval dispersal patterns when compared with measured in situ larval settlement data. (2) Establish connectivity patterns between various oyster reefs within the estuary. (3) Discover larval transport pathways within the Charlotte Harbor estuarine system. Key characteristics of the ABM, in particular the agents serving as simulated larvae, include settlement behavior and salinity tolerance and associated mortality. The ABM accurately recreated larval dispersal patterns during the peak spawning season, providing fundamental insight into the importance of protecting the furthest upstream oyster reef as a sustained larval source to the downstream reefs. Thus, supporting the effectiveness of using field measurements for validation of ABMs and subsequently using ABM simulations to bolster future field studies. Ultimately, this study provides an effective, generally applicable, approach to model larval ecology for restoration purposes.

Research paper thumbnail of Comparison between optical and acoustical estimation of suspended sediment concentration: Field study from a muddy coast

Ocean Engineering, Nov 1, 2013

The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Pro... more The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Profiler (PCADP) to measure suspended sediment concentration (SSC) in a muddy environment where SSC varies over several orders of magnitude. Two seasonal deployments were conducted south of the Atchafalaya-Vermilion Bay system along the Louisiana coast, USA. During a low discharge period of the Atchafalaya River, acoustical estimates of SSC were in good agreement with OBSs deployed. The second deployment was conducted during a high discharge period of the Atchafalaya River. The passage of a cold front across the coast resulted in a rapid advection of the river plume to the study area. High sensitivity of the OBS to fine-grained suspended sediments led to high values from the OBS readings. On the other hand, the PCADP barely sensed the transportation of fine-grained sediments and significantly responded to the combined wave and current shear stress close to sea bed. To reduce the influence of temporal variation of grain size distribution, acoustical backscatter measurements were calibrated over a time span of a few hours. The resulting SSC estimates from the time-adaptive calibration of the PCADPs were in good agreement with data from OBS sensors.

Research paper thumbnail of Sediment dynamics on an inner shelf shoal during storm events in the northeastern Gulf of Mexico, USA

Spaziani, A.L., Jose, F., and Stone, G.W., 2009. Sediment dynamics on an inner shelf shoal during... more Spaziani, A.L., Jose, F., and Stone, G.W., 2009. Sediment dynamics on an inner shelf shoal during storm events in the northeastern Gulf of Mexico . Journal of Coastal Research, SI 56 (Proceedings of the 10th International Coastal Symposium), pg - pg. Lisbon, Portugal, ISBN Sediment resuspension and transport during storm events, specifically tropical storms and hurricanes, is poorly understood on

Research paper thumbnail of Wave-driven sediment transport and beach-dune dynamics in a headland bay beach

Marine Geology, Sep 1, 2012

ABSTRACT This paper presents a comprehensive study of wave refraction, wave and wind driven sedim... more ABSTRACT This paper presents a comprehensive study of wave refraction, wave and wind driven sediment transport, foredune development and Holocene barrier evolution over a variety of time scales at Moçambique Beach, Santa Catarina State, Southern Brazil. The motivation for this study was to examine the relationships between estimated wave driven sediment transport, medium and long term aeolian transport, foredune development, and Holocene barrier volumes and morphology. An analysis of 2 years of wave rider data for the region shows two well defined peaks of frequencies: one of swell waves from the south with a period of 12 s, and another peak of sea waves from east-northeast with a period of 7 s. Longshore sediment transport rates were calculated using high resolution hindcast wave data for the South Atlantic Ocean, which was calibrated by the measured buoy data. The dominant southerly waves drive a longshore gradient in wave energy from south to north, and nearshore/surf zone sediment transport increases from south to north. Beach grain size is fine in both the south and north, and medium in the center. The combination of grain size and wave energy variations creates a marked alongshore variation in surf zone beach types ranging from low energy dissipative in the south, moderate energy intermediate in the central area to moderate to high energy dissipative in the north. Estimates of aeolian sediment transport, volumetric changes in foredune deposition and total Holocene dunefield volumes were also calculated. Results indicate that the morphological behavior of the foredune profiles reflects the gradients of longshore sediment transport and the exposure to wind energy and aeolian sediment delivery, with a maximum of sediment volume and transport towards, and in the central part and northern end of the barrier. Holocene (0–7000 years) barrier volumes vary along the embayment, mimicking the trends in both calculated wave and wind driven sediment transport. The Short and Hesp (1982) model was more suitable in predicting the long term (Holocene) barrier evolution than the size and volume of the foredune. The combination of wide beach, high energy dissipation, maximum sediment supply, and high exposure to strong onshore winds is found in the northern end of the embayment where Holocene subaerial barrier volumes are at a maximum. Overall, this study proves that foredune development is closely related to wind exposure, wave energy and gradients of longshore sediment transport, and that dunefield development reflects the increase downdrift in potential sediment supply from the southern to the northern end of the beach, and the change alongshore from low energy dissipative, through intermediate, to high energy dissipative beach-surf zone environments. This paper significantly extends previous models of beach and dune interactions in that it (i) actually determines wave driven sediment transport for various sections of a long embayment, (ii) relates those transport patterns to surf zone/beach morphodynamic types and variations in alongshore sediment patterns, and (iii) correlates foredune volumes and Holocene barrier volumes (which reflect proxy Holocene onshore transport rates) with wave driven sediment transport rates.

Research paper thumbnail of Storm-driven dispersal of fluvial fine sediment on a low-energy inner shelf

Regional Studies in Marine Science, Apr 1, 2019

Research paper thumbnail of Geomorphological impact of Hurricane Irma on Marco Island, Southwest Florida

Natural Hazards, Jan 4, 2021

Hurricane Irma caused significant damage on Marco Island, where it made landfall on September 10,... more Hurricane Irma caused significant damage on Marco Island, where it made landfall on September 10, 2017. Pre- and post-hurricane beach profiles were analyzed for an arched spit, “Tigertail,” along the northwestern side of the island, and volumetric quantification of its evolution was estimated using SANDS software. LiDAR data from 2008 to 2017 and Google Earth historical imagery dating back to 1995 were used to compare landscape-level changes as a consequence of the storms that affected the region. The data show that the sand spit evolved dramatically from a relatively small sand bar in 1995. The impact of Hurricane Irma appears to be most significant on the northern end of the spit, where nearly 200,000 m3 of sediment was added by the storm between R-monuments V-311 and V-314. About 95,000 m3 of sediment was removed by Hurricane Irma from the mid-island southward, between V-316 and R-133. Overall, the impact of Hurricane Irma was significant for Tigertail Beach and its surroundings, when compared to previous hurricanes, with a net gain from transport and redeposition of 118,000 m3 of sediment on the barrier island and its surroundings.

Research paper thumbnail of Estimation of Chlorophyll-a, TSM and salinity in mangrove dominated tropical estuarine areas of Hooghly River, North East Coast of Bay of Bengal, India using sentinel-3 data

Acta Geophysica

This study aims to explore the variations in spatio-temporal characteristics of water quality fac... more This study aims to explore the variations in spatio-temporal characteristics of water quality factors of three estuaries in the western portion of the Indian Sundarbans. Reliable retrieval of near surface concentrations of parameters such as Chlorophyll-a, SST & TSM in various aquatic ecosystems with broad ranges of trophic needs has always remained a complex issue. In this study the application of C2RCC processor has been tested for its accuracy across different bio optical regimes in inland & coastal waters. Satellite images for the same period were also collected and analysed using the C2RCC processing sequence to retrieve values of factors like the depth of water, surface re ectance, water temperature, inherent optical properties (IOPs), chlorophyll-a, salinity and total suspended matter (TSM) using the SNAP software. During the 2017-2020 season, in situ sampling from speci c locations and laboratory water quality analysis were carried out. The OLCI retrieved results were then trained and corroborated by means of the in situ datasets. It was observed that the highest amount of TSM was recorded in Diamond Harbour during the pre-monsoon, in the year 2018 (301.40 mgL-1 in-situ value, and 308.54 mg L-1 estimated value). Similarly, chlorophyll-a had higher concentrations through the monsoon season (3.03 mg m-3 , in-situ, and 2.96 mg m-3 , estimated) in Fraserganj and Sagar south points. Very good tted correlation results for all seasons between Chl-a, r = 0.829 and TSM, r = 0.924 remained established throughout the comparisons of OLCI and in situ results. The high level of correlation highlights the importance of both primary as well as secondary information in understanding any dynamic system properly. Finally, the result shows that the water quality model outperforms conventional techniques and OLCI chl-a and TSM products. This paper empirically investigates a reliable remote sensing method for estimating coastal TSM and chl-a concentrations and supports the use of OLCI data in ocean colour remote sensing.

Research paper thumbnail of “SeaWARRDD”: Coastal Warning and Rapid Response Data Density: Rethinking Coastal Ocean Observing, Intelligence, Resilience, and Prediction

Marine Technology Society Journal

Florida has a rich coastal and offshore biodiversity and ecology, and its low-lying geography wit... more Florida has a rich coastal and offshore biodiversity and ecology, and its low-lying geography with three dynamic coastlines is unique in many respects. Millions of people are attracted to visit, live, and work in the region. The same unique qualities make Florida highly exposed to impact-weather events, climate change, sea level rise, and environmental interference from exploding population growth over the last few decades. Environmental conditions must be monitored, baselines formed, and advanced circulation and ecosystem models created and verified (in-situ). The SeaWARRDD team discusses the proposed implementation of a comprehensive “Florida Coastal Ocean Observing System” beginning with a pilot study along the inner-West Florida Shelf. Our SeaWARRDD team brings decades of experience to the ocean-observing community, from the federal, state, academic, and private sectors including designing, developing, installing, and maintaining ocean (bay and estuary) monitoring and data colle...

Research paper thumbnail of Vulnerability of Sundarbans to Climate Change and Cyclone Intensification: Mapping, Dynamics and Future Change Analysis of Mangrove Forest Using Landsat Data

Research paper thumbnail of Relative dominance of wind stress curl and Ekman transport on coastal upwelling during summer monsoon in the southeastern Arabian Sea

Continental Shelf Research

Research paper thumbnail of Xbeach: A Tool for Assessing the Vulnerability of Barrier Islands to the Effects of Climate Change

Research paper thumbnail of WITHDRAWN: Storm-driven dispersal of fluvial fine sediments on a low-energy inner shelf

Regional Studies in Marine Science, 2018

Prolonged in-situ measurements and satellite images were analyzed to investigate stormdriven disp... more Prolonged in-situ measurements and satellite images were analyzed to investigate stormdriven dispersal patterns of fluvial fine sediments in the Atchafalaya Bay/Shelf during winter storms and tropical cyclones and how they remotely influence fine-sediment distribution of an offshore sand shoal. It was revealed that storm-driven offshore advection coinciding with sediment re-suspension transports re-suspended sediments and fine sediments from the river from the bay to the inner shelf regardless of the storm types.

Research paper thumbnail of Potential Impacts of Sand Mining on Hydrodynamics and Fine Sediment Suspension and Deposition on an Inner-shelf Shoal

Journal of Coastal Research, 2018

Wave and hydrodynamic models are implemented to investigate whether sand mining on a transgressiv... more Wave and hydrodynamic models are implemented to investigate whether sand mining on a transgressive sand shoal could influence hydrodynamic processes and sedimentary environment of the shoal covered with fine sediments. An effort is made to evaluating shoal hydrodynamic response to a hypothetical dredging scenario under a host of probable storm conditions. The model results show that changes in hydrodynamic and sedimentary environment strongly depend on the storm conditions and the shoal bathymetry. Wave dissipation, flow conditions and sediment re-suspension are significantly higher on the shallower western shoal and gradually decrease toward the deeper eastern section of the shoal. The finding suggests that the deeper eastern shoal can be exposed to frequent deposition of fine sediments, as opposed to the western shoal, despite its location farther away from the nearby major river mouth. It is concluded that large-scale sand mining, in particular from the shallower western shoal, is expected to profoundly alter the hydrodynamics and sediment suspension and deposition processes, which may also influence the benthic ecology of the shoal. The mining from the deeper eastern shoal may result in lesser impacts than the mining from the ecologically sensitive western shoal.

Research paper thumbnail of Comparison between optical and acoustical estimation of suspended sediment concentration: Field study from a muddy coast

Ocean Engineering, 2013

The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Pro... more The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Profiler (PCADP) to measure suspended sediment concentration (SSC) in a muddy environment where SSC varies over several orders of magnitude. Two seasonal deployments were conducted south of the Atchafalaya-Vermilion Bay system along the Louisiana coast, USA. During a low discharge period of the Atchafalaya River, acoustical estimates of SSC were in good agreement with OBSs deployed. The second deployment was conducted during a high discharge period of the Atchafalaya River. The passage of a cold front across the coast resulted in a rapid advection of the river plume to the study area. High sensitivity of the OBS to fine-grained suspended sediments led to high values from the OBS readings. On the other hand, the PCADP barely sensed the transportation of fine-grained sediments and significantly responded to the combined wave and current shear stress close to sea bed. To reduce the influence of temporal variation of grain size distribution, acoustical backscatter measurements were calibrated over a time span of a few hours. The resulting SSC estimates from the time-adaptive calibration of the PCADPs were in good agreement with data from OBS sensors.

Research paper thumbnail of Simulation of wave damping during a cold front over the muddy Atchafalaya shelf

Continental Shelf Research, 2012

ABSTRACT The AtchafalayaShelfofftheLouisianacoastintheUnitedStatesischaracterizedbyfinegrained se... more ABSTRACT The AtchafalayaShelfofftheLouisianacoastintheUnitedStatesischaracterizedbyfinegrained sedimentsdispersingintotheshelffromthelowerAtchafalayaRiverandWaxLakeoutlets.Rapid seawardflushingofthesediment-ladenriverplumes,duetowaterlevelset-downduringcoldfront passagesformsafluidmudlayerclosetothebottom,whicheffectivelydampensthewaveenergy. In thisstudy,theperformanceofaphase-averagedspectralwavemodelwasskillassessedbasedonthe wave datarecordedclosetothesouthernperipheryofthemudzoneduringseveraldaysinMarch2009. Separationofwavespectraintoseaandswellpartitionsshowedthatthewavemodeloverestimated the seawavesgeneratedbynortherlywindduringthecoldfrontpassage.Anon-stationaryschemewas needed tosolvethewaveactionbalanceequationtoincludethewinddynamicsduringthecoldfront passagesoverthestudyarea.Arecentlydevelopedmud-induceddissipationtermwasimprovedby modifyingitsalgorithmforsolvingtheimplicitdispersionequation.Themodifiedmodelbecame efficientenoughtobeusedfornon-stationarycalculations.Thethickness,density,kinematicviscosity of themudlayer,anditsoffshoreextentweredeterminedbytrialanderror.Themud-inducedenergy dissipationtermenabledthemodeltoreproducetheenergyattenuationofshortwavesbythefluid mud. Ahighvalueofmudviscosity(0.01–0.1m2/s) wasrequiredtoobtaingoodagreementwithinsitu measurementswhenthemaximumwaveheightoccurred.However,themodelusinglowervaluesof mud viscosity(0.001–0.01m2/s) wasmoresuccessfulinreproducingthemeasuredwavespectrafroma few hoursafterthemaximumwaveactivity.Thesimulationresultsalsoshowedthatpresenceoffluid mud withhighvalueofmudviscosityhinderedthewavegrowthinshallowwaterduetosuppression of highfrequencywaves.

Research paper thumbnail of Impact of salinity variations on oyster (Crassostrea virginica) larvae settlement in the Caloosahatchee River Estuary in Southwest Florida

Research paper thumbnail of Implementation of a 3-Dimensional Hydrodynamic Model for Sabine Bank, Louisiana

Research paper thumbnail of Acknowledgement of Reviewers for 2018

Journal of Coastal Conservation, 2019

Journal of Coastal Conservation would like to extend our sincere thanks and gratitude to all thos... more Journal of Coastal Conservation would like to extend our sincere thanks and gratitude to all those scientists and experts who have devoted their time and effort to reviewing the papers we have sent you and for the excellent reviews and final decisions that have been made during 2018. We would like to take this opportunity to acknowledge your invaluable contributions to the journal paper review process in the list below:

Research paper thumbnail of Circulation Dynamics and Seasonal Variability for the Charlotte Harbor Estuary, Southwest Florida Coast

Journal of Coastal Research, 2019

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Spectral wave transformation over an elongated sand shoal off south central Louisiana, USA

Journal of Coastal Research (SI 50 …, 2007

... As the waves shoal in shallow waters, wave energy spectra evolve due to refraction, nonlinear... more ... As the waves shoal in shallow waters, wave energy spectra evolve due to refraction, nonlinear energy transfers to higher and lower frequencies (ELGAR ET AL., 1990) and energy dissipation caused by wave breaking and bottom friction (THORNTON AND GUZA, 1983 ...

Research paper thumbnail of An agent‐based model accurately predicts larval dispersal and identifies restoration and monitoring priorities for eastern oyster ( <scp> <i>Crassostrea virginica</i> </scp> ) in a Southwest Florida estuary

Restoration Ecology, Sep 8, 2021

An agent-based modelling (ABM) framework was developed to support oyster reef restoration efforts... more An agent-based modelling (ABM) framework was developed to support oyster reef restoration efforts in the Caloosahatchee River Estuary located within the encompassing Charlotte Harbor estuarine system, Southwest Florida. The modelling approach is novel for this shallow estuary which experiences heavily managed freshwater inflow known to be an ecological stressor to the estuary's oysters. The aim of the study was to (1) determine the ABM's accuracy in simulating larval dispersal patterns when compared with measured in situ larval settlement data. (2) Establish connectivity patterns between various oyster reefs within the estuary. (3) Discover larval transport pathways within the Charlotte Harbor estuarine system. Key characteristics of the ABM, in particular the agents serving as simulated larvae, include settlement behavior and salinity tolerance and associated mortality. The ABM accurately recreated larval dispersal patterns during the peak spawning season, providing fundamental insight into the importance of protecting the furthest upstream oyster reef as a sustained larval source to the downstream reefs. Thus, supporting the effectiveness of using field measurements for validation of ABMs and subsequently using ABM simulations to bolster future field studies. Ultimately, this study provides an effective, generally applicable, approach to model larval ecology for restoration purposes.

Research paper thumbnail of Comparison between optical and acoustical estimation of suspended sediment concentration: Field study from a muddy coast

Ocean Engineering, Nov 1, 2013

The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Pro... more The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Profiler (PCADP) to measure suspended sediment concentration (SSC) in a muddy environment where SSC varies over several orders of magnitude. Two seasonal deployments were conducted south of the Atchafalaya-Vermilion Bay system along the Louisiana coast, USA. During a low discharge period of the Atchafalaya River, acoustical estimates of SSC were in good agreement with OBSs deployed. The second deployment was conducted during a high discharge period of the Atchafalaya River. The passage of a cold front across the coast resulted in a rapid advection of the river plume to the study area. High sensitivity of the OBS to fine-grained suspended sediments led to high values from the OBS readings. On the other hand, the PCADP barely sensed the transportation of fine-grained sediments and significantly responded to the combined wave and current shear stress close to sea bed. To reduce the influence of temporal variation of grain size distribution, acoustical backscatter measurements were calibrated over a time span of a few hours. The resulting SSC estimates from the time-adaptive calibration of the PCADPs were in good agreement with data from OBS sensors.

Research paper thumbnail of Sediment dynamics on an inner shelf shoal during storm events in the northeastern Gulf of Mexico, USA

Spaziani, A.L., Jose, F., and Stone, G.W., 2009. Sediment dynamics on an inner shelf shoal during... more Spaziani, A.L., Jose, F., and Stone, G.W., 2009. Sediment dynamics on an inner shelf shoal during storm events in the northeastern Gulf of Mexico . Journal of Coastal Research, SI 56 (Proceedings of the 10th International Coastal Symposium), pg - pg. Lisbon, Portugal, ISBN Sediment resuspension and transport during storm events, specifically tropical storms and hurricanes, is poorly understood on

Research paper thumbnail of Wave-driven sediment transport and beach-dune dynamics in a headland bay beach

Marine Geology, Sep 1, 2012

ABSTRACT This paper presents a comprehensive study of wave refraction, wave and wind driven sedim... more ABSTRACT This paper presents a comprehensive study of wave refraction, wave and wind driven sediment transport, foredune development and Holocene barrier evolution over a variety of time scales at Moçambique Beach, Santa Catarina State, Southern Brazil. The motivation for this study was to examine the relationships between estimated wave driven sediment transport, medium and long term aeolian transport, foredune development, and Holocene barrier volumes and morphology. An analysis of 2 years of wave rider data for the region shows two well defined peaks of frequencies: one of swell waves from the south with a period of 12 s, and another peak of sea waves from east-northeast with a period of 7 s. Longshore sediment transport rates were calculated using high resolution hindcast wave data for the South Atlantic Ocean, which was calibrated by the measured buoy data. The dominant southerly waves drive a longshore gradient in wave energy from south to north, and nearshore/surf zone sediment transport increases from south to north. Beach grain size is fine in both the south and north, and medium in the center. The combination of grain size and wave energy variations creates a marked alongshore variation in surf zone beach types ranging from low energy dissipative in the south, moderate energy intermediate in the central area to moderate to high energy dissipative in the north. Estimates of aeolian sediment transport, volumetric changes in foredune deposition and total Holocene dunefield volumes were also calculated. Results indicate that the morphological behavior of the foredune profiles reflects the gradients of longshore sediment transport and the exposure to wind energy and aeolian sediment delivery, with a maximum of sediment volume and transport towards, and in the central part and northern end of the barrier. Holocene (0–7000 years) barrier volumes vary along the embayment, mimicking the trends in both calculated wave and wind driven sediment transport. The Short and Hesp (1982) model was more suitable in predicting the long term (Holocene) barrier evolution than the size and volume of the foredune. The combination of wide beach, high energy dissipation, maximum sediment supply, and high exposure to strong onshore winds is found in the northern end of the embayment where Holocene subaerial barrier volumes are at a maximum. Overall, this study proves that foredune development is closely related to wind exposure, wave energy and gradients of longshore sediment transport, and that dunefield development reflects the increase downdrift in potential sediment supply from the southern to the northern end of the beach, and the change alongshore from low energy dissipative, through intermediate, to high energy dissipative beach-surf zone environments. This paper significantly extends previous models of beach and dune interactions in that it (i) actually determines wave driven sediment transport for various sections of a long embayment, (ii) relates those transport patterns to surf zone/beach morphodynamic types and variations in alongshore sediment patterns, and (iii) correlates foredune volumes and Holocene barrier volumes (which reflect proxy Holocene onshore transport rates) with wave driven sediment transport rates.

Research paper thumbnail of Storm-driven dispersal of fluvial fine sediment on a low-energy inner shelf

Regional Studies in Marine Science, Apr 1, 2019

Research paper thumbnail of Geomorphological impact of Hurricane Irma on Marco Island, Southwest Florida

Natural Hazards, Jan 4, 2021

Hurricane Irma caused significant damage on Marco Island, where it made landfall on September 10,... more Hurricane Irma caused significant damage on Marco Island, where it made landfall on September 10, 2017. Pre- and post-hurricane beach profiles were analyzed for an arched spit, “Tigertail,” along the northwestern side of the island, and volumetric quantification of its evolution was estimated using SANDS software. LiDAR data from 2008 to 2017 and Google Earth historical imagery dating back to 1995 were used to compare landscape-level changes as a consequence of the storms that affected the region. The data show that the sand spit evolved dramatically from a relatively small sand bar in 1995. The impact of Hurricane Irma appears to be most significant on the northern end of the spit, where nearly 200,000 m3 of sediment was added by the storm between R-monuments V-311 and V-314. About 95,000 m3 of sediment was removed by Hurricane Irma from the mid-island southward, between V-316 and R-133. Overall, the impact of Hurricane Irma was significant for Tigertail Beach and its surroundings, when compared to previous hurricanes, with a net gain from transport and redeposition of 118,000 m3 of sediment on the barrier island and its surroundings.

Research paper thumbnail of Estimation of Chlorophyll-a, TSM and salinity in mangrove dominated tropical estuarine areas of Hooghly River, North East Coast of Bay of Bengal, India using sentinel-3 data

Acta Geophysica

This study aims to explore the variations in spatio-temporal characteristics of water quality fac... more This study aims to explore the variations in spatio-temporal characteristics of water quality factors of three estuaries in the western portion of the Indian Sundarbans. Reliable retrieval of near surface concentrations of parameters such as Chlorophyll-a, SST & TSM in various aquatic ecosystems with broad ranges of trophic needs has always remained a complex issue. In this study the application of C2RCC processor has been tested for its accuracy across different bio optical regimes in inland & coastal waters. Satellite images for the same period were also collected and analysed using the C2RCC processing sequence to retrieve values of factors like the depth of water, surface re ectance, water temperature, inherent optical properties (IOPs), chlorophyll-a, salinity and total suspended matter (TSM) using the SNAP software. During the 2017-2020 season, in situ sampling from speci c locations and laboratory water quality analysis were carried out. The OLCI retrieved results were then trained and corroborated by means of the in situ datasets. It was observed that the highest amount of TSM was recorded in Diamond Harbour during the pre-monsoon, in the year 2018 (301.40 mgL-1 in-situ value, and 308.54 mg L-1 estimated value). Similarly, chlorophyll-a had higher concentrations through the monsoon season (3.03 mg m-3 , in-situ, and 2.96 mg m-3 , estimated) in Fraserganj and Sagar south points. Very good tted correlation results for all seasons between Chl-a, r = 0.829 and TSM, r = 0.924 remained established throughout the comparisons of OLCI and in situ results. The high level of correlation highlights the importance of both primary as well as secondary information in understanding any dynamic system properly. Finally, the result shows that the water quality model outperforms conventional techniques and OLCI chl-a and TSM products. This paper empirically investigates a reliable remote sensing method for estimating coastal TSM and chl-a concentrations and supports the use of OLCI data in ocean colour remote sensing.

Research paper thumbnail of “SeaWARRDD”: Coastal Warning and Rapid Response Data Density: Rethinking Coastal Ocean Observing, Intelligence, Resilience, and Prediction

Marine Technology Society Journal

Florida has a rich coastal and offshore biodiversity and ecology, and its low-lying geography wit... more Florida has a rich coastal and offshore biodiversity and ecology, and its low-lying geography with three dynamic coastlines is unique in many respects. Millions of people are attracted to visit, live, and work in the region. The same unique qualities make Florida highly exposed to impact-weather events, climate change, sea level rise, and environmental interference from exploding population growth over the last few decades. Environmental conditions must be monitored, baselines formed, and advanced circulation and ecosystem models created and verified (in-situ). The SeaWARRDD team discusses the proposed implementation of a comprehensive “Florida Coastal Ocean Observing System” beginning with a pilot study along the inner-West Florida Shelf. Our SeaWARRDD team brings decades of experience to the ocean-observing community, from the federal, state, academic, and private sectors including designing, developing, installing, and maintaining ocean (bay and estuary) monitoring and data colle...

Research paper thumbnail of Vulnerability of Sundarbans to Climate Change and Cyclone Intensification: Mapping, Dynamics and Future Change Analysis of Mangrove Forest Using Landsat Data

Research paper thumbnail of Relative dominance of wind stress curl and Ekman transport on coastal upwelling during summer monsoon in the southeastern Arabian Sea

Continental Shelf Research

Research paper thumbnail of Xbeach: A Tool for Assessing the Vulnerability of Barrier Islands to the Effects of Climate Change

Research paper thumbnail of WITHDRAWN: Storm-driven dispersal of fluvial fine sediments on a low-energy inner shelf

Regional Studies in Marine Science, 2018

Prolonged in-situ measurements and satellite images were analyzed to investigate stormdriven disp... more Prolonged in-situ measurements and satellite images were analyzed to investigate stormdriven dispersal patterns of fluvial fine sediments in the Atchafalaya Bay/Shelf during winter storms and tropical cyclones and how they remotely influence fine-sediment distribution of an offshore sand shoal. It was revealed that storm-driven offshore advection coinciding with sediment re-suspension transports re-suspended sediments and fine sediments from the river from the bay to the inner shelf regardless of the storm types.

Research paper thumbnail of Potential Impacts of Sand Mining on Hydrodynamics and Fine Sediment Suspension and Deposition on an Inner-shelf Shoal

Journal of Coastal Research, 2018

Wave and hydrodynamic models are implemented to investigate whether sand mining on a transgressiv... more Wave and hydrodynamic models are implemented to investigate whether sand mining on a transgressive sand shoal could influence hydrodynamic processes and sedimentary environment of the shoal covered with fine sediments. An effort is made to evaluating shoal hydrodynamic response to a hypothetical dredging scenario under a host of probable storm conditions. The model results show that changes in hydrodynamic and sedimentary environment strongly depend on the storm conditions and the shoal bathymetry. Wave dissipation, flow conditions and sediment re-suspension are significantly higher on the shallower western shoal and gradually decrease toward the deeper eastern section of the shoal. The finding suggests that the deeper eastern shoal can be exposed to frequent deposition of fine sediments, as opposed to the western shoal, despite its location farther away from the nearby major river mouth. It is concluded that large-scale sand mining, in particular from the shallower western shoal, is expected to profoundly alter the hydrodynamics and sediment suspension and deposition processes, which may also influence the benthic ecology of the shoal. The mining from the deeper eastern shoal may result in lesser impacts than the mining from the ecologically sensitive western shoal.

Research paper thumbnail of Comparison between optical and acoustical estimation of suspended sediment concentration: Field study from a muddy coast

Ocean Engineering, 2013

The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Pro... more The aim of this study is to evaluate the ability of a 1.5 MHz Pulse-coherent Acoustic Doppler Profiler (PCADP) to measure suspended sediment concentration (SSC) in a muddy environment where SSC varies over several orders of magnitude. Two seasonal deployments were conducted south of the Atchafalaya-Vermilion Bay system along the Louisiana coast, USA. During a low discharge period of the Atchafalaya River, acoustical estimates of SSC were in good agreement with OBSs deployed. The second deployment was conducted during a high discharge period of the Atchafalaya River. The passage of a cold front across the coast resulted in a rapid advection of the river plume to the study area. High sensitivity of the OBS to fine-grained suspended sediments led to high values from the OBS readings. On the other hand, the PCADP barely sensed the transportation of fine-grained sediments and significantly responded to the combined wave and current shear stress close to sea bed. To reduce the influence of temporal variation of grain size distribution, acoustical backscatter measurements were calibrated over a time span of a few hours. The resulting SSC estimates from the time-adaptive calibration of the PCADPs were in good agreement with data from OBS sensors.

Research paper thumbnail of Simulation of wave damping during a cold front over the muddy Atchafalaya shelf

Continental Shelf Research, 2012

ABSTRACT The AtchafalayaShelfofftheLouisianacoastintheUnitedStatesischaracterizedbyfinegrained se... more ABSTRACT The AtchafalayaShelfofftheLouisianacoastintheUnitedStatesischaracterizedbyfinegrained sedimentsdispersingintotheshelffromthelowerAtchafalayaRiverandWaxLakeoutlets.Rapid seawardflushingofthesediment-ladenriverplumes,duetowaterlevelset-downduringcoldfront passagesformsafluidmudlayerclosetothebottom,whicheffectivelydampensthewaveenergy. In thisstudy,theperformanceofaphase-averagedspectralwavemodelwasskillassessedbasedonthe wave datarecordedclosetothesouthernperipheryofthemudzoneduringseveraldaysinMarch2009. Separationofwavespectraintoseaandswellpartitionsshowedthatthewavemodeloverestimated the seawavesgeneratedbynortherlywindduringthecoldfrontpassage.Anon-stationaryschemewas needed tosolvethewaveactionbalanceequationtoincludethewinddynamicsduringthecoldfront passagesoverthestudyarea.Arecentlydevelopedmud-induceddissipationtermwasimprovedby modifyingitsalgorithmforsolvingtheimplicitdispersionequation.Themodifiedmodelbecame efficientenoughtobeusedfornon-stationarycalculations.Thethickness,density,kinematicviscosity of themudlayer,anditsoffshoreextentweredeterminedbytrialanderror.Themud-inducedenergy dissipationtermenabledthemodeltoreproducetheenergyattenuationofshortwavesbythefluid mud. Ahighvalueofmudviscosity(0.01–0.1m2/s) wasrequiredtoobtaingoodagreementwithinsitu measurementswhenthemaximumwaveheightoccurred.However,themodelusinglowervaluesof mud viscosity(0.001–0.01m2/s) wasmoresuccessfulinreproducingthemeasuredwavespectrafroma few hoursafterthemaximumwaveactivity.Thesimulationresultsalsoshowedthatpresenceoffluid mud withhighvalueofmudviscosityhinderedthewavegrowthinshallowwaterduetosuppression of highfrequencywaves.

Research paper thumbnail of Impact of salinity variations on oyster (Crassostrea virginica) larvae settlement in the Caloosahatchee River Estuary in Southwest Florida

Research paper thumbnail of Implementation of a 3-Dimensional Hydrodynamic Model for Sabine Bank, Louisiana

Research paper thumbnail of Acknowledgement of Reviewers for 2018

Journal of Coastal Conservation, 2019

Journal of Coastal Conservation would like to extend our sincere thanks and gratitude to all thos... more Journal of Coastal Conservation would like to extend our sincere thanks and gratitude to all those scientists and experts who have devoted their time and effort to reviewing the papers we have sent you and for the excellent reviews and final decisions that have been made during 2018. We would like to take this opportunity to acknowledge your invaluable contributions to the journal paper review process in the list below:

Research paper thumbnail of Circulation Dynamics and Seasonal Variability for the Charlotte Harbor Estuary, Southwest Florida Coast

Journal of Coastal Research, 2019

BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access t... more BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Research paper thumbnail of Spectral wave transformation over an elongated sand shoal off south central Louisiana, USA

Journal of Coastal Research (SI 50 …, 2007

... As the waves shoal in shallow waters, wave energy spectra evolve due to refraction, nonlinear... more ... As the waves shoal in shallow waters, wave energy spectra evolve due to refraction, nonlinear energy transfers to higher and lower frequencies (ELGAR ET AL., 1990) and energy dissipation caused by wave breaking and bottom friction (THORNTON AND GUZA, 1983 ...