| Hurricane Ivan Nearshore Wave Data, Perdido Pass, Alabama |
Aug-2009 |
31 pages |
| Authors:
Margaret A Sabol; James P McKinney; Linda Lillycrop; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
 | In November 2001, the U.S. Army Engineer District, Mobile, funded the Coastal and Hydraulics Laboratory, U.S. Army Engineer Research and Development Center (ERDC) to deploy a bottom mounted wave gage in 30 ft of water approximately 1 mile offshore of Perdido Pass, AL. On 16 September 2004, Hurricane Ivan made landfall 20 miles west of Perdido Pass as a category 3 hurricane with 120 miles-per-hour maximum winds. The gage was ... |
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| Influence of Marsh Restoration and Degradation on Storm Surge and Waves |
Jul-2009 |
11 pages |
| Authors:
Jane M Smith; Mary A Cialone; Ty V Wamsley; Joannes Westerink; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The purpose of this CHETN is to examine storm surge and wave reduction benefits of marsh restoration, as well as the impact of future wetland degradation on local surge and wave conditions. Storm surge simulations of representative moderate and severe hurricanes were performed using the ADCIRC storm surge model, with the inclusion of radiation stress gradients from the STWAVE nearshore wave model. Coupled model simulations were made for wetland landscape ... |
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| Field Observations and SWAN Model Predictions of Wave Evolution in a Muddy Coastal Environment |
Jun-2009 |
91 pages |
| Authors:
Lincoln T Trainor; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| It is well known that the presence of mud deposits on the continental shelf can cause dramatic damping of ocean surface waves, but quantitative field observations are very scarce. Wave prediction models currently lack a physics-based representation of the mud-induced dissipation process, and hence the accuracy of wave predictions in muddy littoral environments is unknown. This thesis presents a comprehensive field data set for comparison with the operational wave model ... |
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| A Model-Coupling Framework for Nearshore Waves, Currents, Sediment Transport, and Seabed Morphology |
Jan-2009 |
16 pages |
| Authors:
H S Tang; T R Keen; R Khanbilvardi; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| This paper presents a framework for synchronously coupling wave, current, sediment transport, and seabed morphology for the accurate simulation of multi-physics coastal ocean processes. The governing equations, which represent models that are commonly adopted in practical simulations, are discretized using finite-difference methods. The resulting system is validated against analytical solutions. In order to test the performance of the proposed framework and the numerical methods, dam-break flow over a mobile-bed and ... |
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| Wave, Tidal, and In-Stream Energy Projects: Which Federal Agency Has the Lead |
26-Nov-2008 |
|
| Authors:
Nic Lane; LIBRARY OF CONGRESS WASHINGTON DC CONGRESSIONAL RESEARCH SERVICE
|
 | Developments in wave, tidal, and in-stream energy generation technologies also referred to as hydrokinetic or marine energy are beginning to gain momentum. At the same time, their regulatory status is still evolving, as shown by recent changes in law aimed at clarifying the federal role in ocean wave and renewable energy. Two federal agencies currently appear to have a lead role in offshore renewable energy projects. The Department of the ... |
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| Acceleration Effects on Fluid-Sediment Interaction |
JUN 2008 |
9 pages |
| Authors:
Ole S. Madsen; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING
|
| The long-term goals of this research are: (i) to identify all relevant physical processes that participate in and contribute significantly to sediment transport in near-shore coastal waters; (ii) to investigate each of the identified processes in order to understand the underlying physics in a quantitative manner; (iii) to develop simple predictive models for each process; and (iv) to incorporate the simple predictive process-models in a predictive model for beach profile ... |
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| Cohesive Sediment Entrainment Rate Functions: Expanding and Quantifying their Parameterizations |
03-Apr-2008 |
38 pages |
| Authors:
Mark Cobb; Timothy R Keen; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The erosion characteristics of cohesive sediments in nearshore environments depend on a number of biogeochemical processes. It is standard practice to experimentally determine the entrainment rate of sediment into the water column as a function of the applied bottom shear stress and fit this data to a power law function. This work addresses the inherent problems of fitting entrainment rate data to parameterized functions, focusing on the non-uniqueness of the ... |
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| Optical Imaging of the Nearshore |
20 MAR 2008 |
6 pages |
| Authors:
Robert A. Holman; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
|
| This grant supported a variety of studies in the area of littoral processes typically as revealed by the optical remote sensing data of the Argus Program. One principle theme was me development of algorithms for estimating relevant geophysical variables such as longshore currents and wave directional spectra from ground-based optical cameras. The second theme was the study of observed nearshore physics. Much of the latter work focused on the morpho-dynamics ... |
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| Bedforms and Mine Burial in the Nearshore |
MAR 2008 |
8 pages |
| Authors:
Edith L. Gallagher; Rob Holman; FRANKLIN AND MARSHALL COLL LANCASTER PA BIOLOGY DEPT
|
| The threat of mines has an enormous impact on Naval operations. Methods exist for search and identification of proud mines, but the potential existence of buried mines is of considerable concern. This work will help to describe the process of mine burial owing to bottom bedform movement by quantifying the expected time scales and depths of disturbance of the natural bed in the nearshore. As waves work the sediments on ... |
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| Validation Test Report for Delft3D |
29 FEB 2008 |
47 pages |
| Authors:
Y. L. Hsu; James D. Dykes; Richard A. Allard; David W. Wang; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS
|
| This report describes the model setup, parameter selection and model validation of the Delft3D modeling system in nearshore applications. Delft3D, developed by Delft Hydraulics, is a complete coastal hydrodynamic modeling system, capable of simulating hydrodynamic processes due to waves, tides, river flow, and winds. Three high-fidelity observation data sets are used for validation tests. The first data set is from the Nearshore Sediment Transport Study (NSTS) data at Santa Barbara, ... |
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| Layered Organization in the Coastal Ocean: Acoustical Data Acquisition, Analyses and Synthesis |
Jan-2008 |
10 pages |
| Authors:
D V Holliday; C F Greenlaw; RHODE ISLAND UNIV NARRAGANSETT GRADUATE SCHOOL OF OCEANOGRAPHY
|
| The long-term goal of our research is to improve our ability to observe the ocean's plants, animals, and their physical and chemical environment at the scales that control how they live, reproduce, and die. We are working with our colleagues in the ONR-sponsored research program on Layered Organization in the Coastal Ocean (LOCO) to jointly analyze data collected in Monterey Bay, CA during FY2002, 2005 and 2006. Our work this ... |
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| Bioluminescence Potential in the Transition Zone to Very Shallow Water (VSW) |
Jan-2008 |
9 pages |
| Authors:
Mark A Moline; CALIFORNIA POLYTECHNIC STATE UNIV SAN LUIS OBISPO
|
| The long-term goal is to advance our understanding of the ecology of bioluminescent organisms and the mechanisms governing the temporal and depth-dependent variability of bioluminescence in the coastal ocean. With improvements in technology, finer-scale resolution and concurrent physical, chemical and biological data are available to advance our understanding of the forcing mechanisms governing the temporal and depth-dependent variability of bioluminescence in environments of Naval relevance. In addition, few measurements of ... |
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| Prediction of Nearshore Waves and Currents: Model Sensitivity, Confidence and Assimilation |
DEC 2007 |
7 pages |
| Authors:
H. T. Ozkan-Haller; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
|
| The rip current field resulting from the transformation of surface gravity waves over offshore submarine canyons has been studied. Employing a wave transformation model and a wave-induced circulation model over observed bathymetry we find that wave height variations associated with undulations in the canyon contours cause rip current circulation cells with alongshore spacing of O(100m) even though the nearshore bathymetry displays no variations at these length scales. Further, the predicted ... |
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| Full-Plane STWAVE with Bottom Friction. 2. Model Overview |
AUG 2007 |
16 pages |
| Authors:
Jane McKee Smith; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The purpose of this System-Wide Water Resources (SWWRP) Technical Note is to describe the full-plane version of the STWAVE wave generation and transformation model (Smith et al. 2001; Smith 2001; Smith and Smith 2002; and Smith and Zundel 2006). |
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| Great Blue Herons in Puget Sound |
JUN 2007 |
37 pages |
| Authors:
Ann Eissinger; WASHINGTON DEPT OF FISH AND WILDLIFE OLYMPIA
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| The Great Blue Heron (Ardea herodias) is an iconic species representing the natural heritage, interconnectedness and ecological richness of Puget Sound and the greater Salish Sea (Puget Sound, Strait of Georgia and Strait of Juan de Fuca). This area constitutes the greatest concentration of Great Blue Herons on the West Coast and harbors some of the largest heronries in North America. As a predator and nearshore-associated species, heron populations are ... |
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| Marine Forage Fishes in Puget Sound |
MAR 2007 |
31 pages |
| Authors:
Dan Penttila; WASHINGTON DEPT OF FISH AND WILDLIFE OLYMPIA
|
| Forage fishes are small, schooling fishes that are key prey items for larger predatory fish and wildlife in a marine food web. In Puget Sound, forage fish species occupy every marine and estuarine nearshore habitat. Nearshore habitats are of special concern, because many species use them for spawning. This report focus on three species that commonly occur within the nearshore zone of Pacific Northwest beaches: Pacific herring (Clupea pallasi), surf ... |
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| Orcas in Puget Sound |
JAN 2007 |
31 pages |
| Authors:
Birgit Kriete; CORPS OF ENGINEERS SEATTLE WA SEATTLE DISTRICT
|
| Ecologically, economically and recreationally, southern resident and transient killer whales have become greatly important to the nearshore environment of Puget Sound. Economically, whale watching in the San Juan Islands alone has become a $10 million industry in the last few years. The stock of southern resident killer whales (SRKW) in the eastern North Pacific declined by almost 20% in a five-year period to fewer than 80 individuals in 2001. These ... |
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| Forecasting and Hindcasting Waves With the SWAN Model in the Southern California Bight |
2007 |
17 pages |
| Authors:
W. E. Rogers; James M. Kaihatu; Larry Hsu; Robert E. Jensen; James D. Dykes; K. T. Holland; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The Naval Research Laboratory created a wave forecasting system in support of the Nearshore Canyon Experiment (NCEX) field program. The outer nest of this prediction system encompassed the Southern California Bight. This forecasting system is described in this paper, with analysis of results via comparison to the extensive buoy network in the region. There are a number of potential errors, two of which are poor resolution of islands in the ... |
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| Evaluation of ADCP Wave Measurements |
DEC 2006 |
71 pages |
| Authors:
Jeremy D. Boyd; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Nearshore wave information is important to a variety of United States Navy operations in the littorals, including mine warfare, amphibious operations, small boat operations and special forces insertions. The objective of this thesis is to evaluate the accuracy of Teledyne RDI Acoustic Doppler Current Profilers (ADCP), in measuring wave height and direction spectra, so that the military can use these for routine wave measurements nearshore. This study uses ADCP data ... |
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| Using Acoustic Backscatter to Measure Sediment Flux in the Surf Zone |
DEC 2006 |
75 pages |
| Authors:
Preston J. Roland; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Transport of sediment in coastal regions directly impacts mine countermeasure operations and naval construction efforts. Wave induced shear stress in the surf zone is responsible for entraining sediment particles into suspension within the combined wave and current boundary layer, where momentum is imparted through highly nonlinear processes. Therefore, a detailed understanding of sediment flux processes in the surf zone is essential to accurately model net sediment transport. This study examines ... |
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| Analysis and Modeling of Surfzone Turbulence and Bubbles |
29 NOV 2006 |
6 pages |
| Authors:
Falk Feddersen; SCRIPPS INST OF OCEANOGRAPHY LA JOLLA CA INTEGRATIVE OCEANOGRAPHY DIV
|
| Turbulence in the surfzone and nearshore mixes momentum vertically, transmits stress to the sea bed, influences the structure of the cross- and alongshore currents, and controls the suspension of sediment from the sea bed. In many coastal and shelf environments, the sea-bed is the primary source of turbulence due to bottom induced shear. In the surfzone, the breaking-wave generated turbulence likely dominates over bottom generated turbulence. However, the dynamics of ... |
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| Coastal Habitats in Puget Sound: A Research Plan in Support of the Puget Sound Nearshore Partnership |
NOV 2006 |
51 pages |
| Authors:
Guy Gelfenbaum; Tom Mumford; Jim Brennan; Harvey Case; Megan Dethier; Kurt Fresh; Fred Goetz; Marijke van Heeswijk; Thomas M. Leschine; Miles Logsdon; CORPS OF ENGINEERS SEATTLE WA SEATTLE DISTRICT
|
| This research plan identifies high-priority research goals and objectives and delineates the critical questions and information gaps that need to be addressed to effectively undertake restoration planning and adaptive management of the nearshore ecosystems of Puget Sound. To support this science-based approach and guide scientific research in support of nearshore ecosystem restoration, the U.S. Geological Survey and the PSNERP Nearshore Science Team collaborated in development of this research plan, organized ... |
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| Dune Erosion, Mega-Cusps and Rip Currents: Modeling of Field Data |
SEP 2006 |
53 pages |
| Authors:
Jr Keefer Thomas B.; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Sand dune erosion is highly episodic occurring only when storm waves coincide with high tides generating swash that impacts the toe of the dune. Owing to the episodic nature of sand dune erosion, it is difficult to observe in nature. The removal of a structure and rip-rap sea-wall from the Stilwell Hall site located in southern Monterey Bay provided a unique opportunity to study erosion processes at an accelerated rate. ... |
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| Infragravity Waves Over Topography: Generation, Dissipation, and Reflection |
SEP 2006 |
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| Authors:
James M. Thomson; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| Ocean surface infragravity waves (periods from 20 to 200 s) observed along the southern California coast are shown to be sensitive to the bottom topography of the shelf region, where propagation is linear, and of the nearshore region, where nonlinearity is important. Infragravity waves exchange energy with swell and wind waves (periods from 5 to 20 s) via conservative nonlinear interactions that approach resonance with decreasing water depth. Consistent with ... |
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| Evolution of a Surfzone Hole: Part 1. Pilot |
16 AUG 2006 |
|
| Authors:
Steve Elgar; Britt Raubenheimer; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
|
| This project provided funds for initial investigations about the behavior of a large hole in the surfzone. A backhoe was used to create a 10-m diameter, 2-m deep hole that simulated the change to the morphology caused by an explosion near the shoreline. The hole was created near the water line at low tide, and instrumented with many acoustic Doppler current meters. As the tide rose, continuous surveys of the ... |
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| Including Nearshore Processes in Phase-Averaged Hydrodynamics Models |
AUG 2006 |
47 pages |
| Authors:
Bradley D. Johnson; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
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| The large spatial and time scales of the numerical modeling projects of the U.S. Army Corps of Engineers (USACE) requires the use of computationally efficient phase-averaged hydrodynamic models derived by averaging the equations of motion over a representative short wave period. Guidance in modeling nearshore regions with phase-averaged hydrodynamic models is provided herein. Physical processes unique to the surf zone are described along with methods of incorporating these effects to ... |
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| Oceanographic Factors and Erosion of the Outer Banks During Hurricane Isabel |
08 JUN 2006 |
9 pages |
| Authors:
T. R. Keen; C. Rowley; J. Dykes; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The meteorological and oceanographic processes responsible for erosion of the Outer Banks of North Carolina during Hurricane Isabel have been simulated using a suite of numerical models. The computed wind, wave, current, and water level fields are used to drive a three- dimensional numerical sedimentation model that calculates nearshore sediment transport and erosion potential. The erosion potential is the quantity of sand that can be transported by the coastal transport ... |
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| The Role of Shipyard Pollutants in Structuring Coral Reef Microbial Communities: Monitoring Environmental Change and the Potential Causes of Coral Disease |
JUN 2006 |
226 pages |
| Authors:
Bruce W. Fouke; ILLINOIS UNIV AT URBANA DEPT OF GEOLOGY
|
| The US Navy operates military bases in tropical and sub-tropical seas that are surrounded by coral reefs. Therefore, the goal of this work has been to develop methods for long-term monitoring of the effects of naval activity on the health of these reef ecosystems. Our research shows that microbes inhabiting the tissues of healthy and diseased coral are sensitive indicators of environmental change associated with harbor and near-shore naval activity. ... |
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| Modeling of Hurricane Impacts, Interim Report 1 |
MAY 2006 |
16 pages |
| Authors:
Dano Roelvink; Ad Reniers; Ap Van Dongeren; Dirk-Jan Walstra; UNESCO-THE INST FOR WATER EDUCATION DELFT (NETHERLANDS)
|
| This first interim report describes the development of dune erosion algorithms based on an analysis of existing approaches; it describes the activities related to the ShoreCirc model required to make it suitable for modeling of the nearshore hydrodynamics during hurricanes and it describes a newly developed model for inner surfzone swash and overwash processes. Significant progress was made here and a set of Matlab routines providing much of the needed ... |
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| Nearshore Birds in Puget Sound |
MAY 2006 |
25 pages |
| Authors:
Joseph B. Buchanan; WASHINGTON DEPT OF FISH AND WILDLIFE OLYMPIA
|
| This document describes birds found in Puget Sound. Three primary marine avian habitats are examined: open water, rocky shoreline and open mud-flats. The species associated with these habitats that are included in this document are Surf Scoter (Melanitta perspicillata), Black Oystercatcher (Haematopus bachmani) and Dunlin (Calidris alpina). Distribution, life history, habitat requirements and key stressors are examined. Ecosystem processes affecting nearshore birds is discussed. |
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| Native Shellfish in Nearshore Ecosystems of Puget Sound |
APR 2006 |
27 pages |
| Authors:
Megan N. Dethier; Tom Mumford; Tom Leschine; Kurt Presh; Si Simenstad; Hugh Shipman; Doug Myers; Miles Logsdon; Randy Shuman; Curtis Tanner; Fred Goetz; WASHINGTON UNIV SEATTLE
|
| This document describes invertebrates found in Puget sound. Life history strategies, habitat requirements and anthropogenic influences are examined. Stock status and population trends of commercially important species is outlined. Land use and its impacts on the nearshore environment is discussed. |
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| Full Plant STWAVE: SMS Graphical Interface |
MAR 2006 |
11 pages |
| Authors:
Jane McKee Smith; Alan Zundel; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The purpose of this Coastal and Hydraulics Engineering Technical Note (CHETN) is to describe the graphical interface for the full-plane version of the wave model STWAVE (Smith et al. 2001; Smith 2001; and Smith and Smith 2002) that has been added to the U.S. Army Corps of Engineers (USACE) Surface Water Modeling System (SMS). A subsequent publication will describe the capabilities added in the full plane version of the model. ... |
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| Incident Boundary Conditions for Wave Transformation |
2006 |
13 pages |
| Authors:
Jane M. Smith; Mark B. Gravens; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| The nearshore wave transformation model STWAVE is used to transform hindcast wave time histories to the shore to estimate longshore sediment transport rates. These transport rates are used to evaluate engineering design of beach fills and coastal shore protection structures. The boundary conditions used to force STWAVE are typically derived from the Wave Information Studies (WIS) wind-wave hindcast database. In the past, only bulk wave parameters (height, period, and direction) ... |
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| Breakwater and Revetment Armor Stability |
DEC 2005 |
8 pages |
| Authors:
Jeffrey A. Melby; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| This Coastal and Hydraulics Engineering Technical Note (CHETN) provides improved predictive equations for coastal rubble-mound stone-armor stability. The engineering methods outlined apply to breakwaters and revetments exposed to wave loading. The stability equations are based on the concept that the maximum wave force causing armor instability is proportional to the maximum wave momentum flux near the structure toe. This concept introduces a more physics-based first principles approach to estimation of ... |
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| COAMPS Simulations of the Coastal Atmosphere |
DEC 2005 |
3 pages |
| Authors:
Eric D. Skyllingstad; Roger M. Samelson; OREGON STATE UNIV CORVALLIS
|
| Work has focused primarily on simulations of the coastal atmosphere, and on building a coupled regional ocean-atmosphere model, based on the Naval Research Laboratory - COAMPS and Rutgers/UCLA ROMS models, for use on multiple processor, cluster systems. Progress to date includes the development of a processor management code module using the Model Coupling Toolkit (MCT) (Argonne National Laboratory). The management module is able to run both COAMPS and ROMS on ... |
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| Parameterization of a Two-Phase Sheet Flow Model and Application to Nearshore Morphology |
NOV 2005 |
5 pages |
| Authors:
Steve Elgar; Tian-Jian Hsu; Daniel M. Hanes; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF APPLIED OCEAN PHYSICS AND ENGINEERING
|
| The overall objective is to develop and test with laboratory and field observations a model that predicts sediment transport and morphological change in the nearshore for a range of wave conditions and sediment characteristics. The specific objectives of this project were to: 1. parameterize the wave-induced bottom stress and sediment transport rate using a two-phase sheet flow model, 2. couple the sediment transport model with a time-domain Boussinesq hydrodynamic model ... |
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| Parameterizing the High Frequency Evolution of Nearshore Waves in a Nonlinear Wave Model |
07 OCT 2005 |
100 pages |
| Authors:
Kacey Edwards; Jayaram Veeramony; James Kaihatu; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| Waves propagating through the shoaling and surf zones exhibit properties not characteristic of linear sinusoidal waves. Nonlinear wave-wave interactions act to transfer energy between the different harmonics of the peak frequency; this transfer is most apparent from the peak frequency of the spectrum to higher harmonics of the peak. As a result of these nonlinear interactions, the shape of a wave is altered making it asymmetrical vertically (skewness) and horizontally ... |
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| Variational Data Assimilation for Near-Shore Waves Using the Extended Boussinesq Equations |
OCT 2005 |
36 pages |
| Authors:
David T. Walker; GENERAL DYNAMICS YPSILANTI MI ADVANCED INFORMATION SYSTEMS
|
| This report describes a variational approach for assimilation of single-point, in-situ observations of surface elevation and velocity into the extended Boussinesq model of Wei et al. (1996). The mathematical framework for assimilation is presented, along with applications of the procedure for two cases: monochromatic waves and broad-spectrum irregular waves. Overall the performance of the approach for monochromatic waves is quite good; while for irregular waves, some of the short-wave detail, ... |
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| Monitoring of Beachsaver Reef with Filter Blanket and Double-T Sill at Cape May Point, New Jersey, Section 227 Demonstration Site; First Year Monitoring - 2002-2003 |
21 SEP 2005 |
120 pages |
| Authors:
Donald K. Stauble; Randall A. Wise; J. B. Smith; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICSLAB
|
| The first National Shoreline Erosion Control Development and Demonstration project is located at Cape May Point, NJ, the southernmost beach along the New Jersey coast. This site was selected to evaluate the functional, structural, and economic performance of the patented Beachsaver Reef prefabricated concrete submerged breakwater and the less expensive prefabricated concrete structure called a Double-T sill. This demonstration project was developed through a cooperative effort of the U. S. ... |
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| Biophysical Coupling Between Turbulence, Veliger Behavior, and Larval Supply |
SEP 2005 |
|
| Authors:
Heidi L. Fuchs; MASSACHUSETTS INST OF TECH CAMBRIDGE
|
| The goals of this thesis were to quantify the behavior of gastropod larvae (mud snails Ilyanassa obsoleta) in turbulence, and to investigate how that behavior affects larval supply in a turbulent coastal inlet. Gastropod larvae retract their velums and sink rapidly in strong turbulence. Turbulence-induced sinking would be an adaptive behavior if it resulted in increased larval supply and enhanced settlement in suitable coastal habitats. In laboratory experiments, mud snail ... |
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| Waves, Currents, and Sediment Transport in the Surf Zone Along Long, Straight Beaches |
AUG 2005 |
308 pages |
| Authors:
Yoshimitsu Tajima; Ole S. Madsen; MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF CIVIL ENGINEERING
|
| This study presents a theoretical model for predictions of nearshore hydrodynamic characteristics and the local sediment transport rate along long, straight beaches. The wave may be periodic or random, the beach may be plane or barred, and the bed may be concrete or covered with movable natural sand grains. The present model must be efficient and flexible so that it can accommodate iterative computations for time-varying and, hence, arbitrary beach ... |
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| Analysis of Nearshore Currents Near a Submarine Canyon |
JUN 2005 |
63 pages |
| Authors:
Matthew S. Cushanick; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Accurate prediction of nearshore waves and currents is of critical importance in littoral naval operations. This study examines the effects of complex bathymetry on nearshore currents. Data collected by an array of 12 pressure and velocity sensors in the Nearshore Canyon Experiment (NCEX), conducted near La Jolla, California in 2003, were analyzed to investigate the variability of nearshore currents near a submarine canyon. Time series of pressure, 3-component velocity, and ... |
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| Ground-Water Reconnaissance of the Bijou Creek Watershed, South Lake Tahoe, California, June-October 2003 |
2005 |
41 pages |
| Authors:
GEOLOGICAL SURVEY WASHINGTON DC
|
| A ground-water reconnaissance study of the Bijou Creek watershed in South Lake Tahoe California was done during the summer and early fall of 2003. This study provides basic hydrologic data for a region in the Lake Tahoe Basin in which a continuing loss of lake clarity is occurring in the a nearshore zone of Lake Tahoe. Wells, springs, and a surface-water site were located and basic hydrologic data were collected. ... |
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| DIOPS: A PC-Based Wave, Tide and Surf Prediction System |
2005 |
7 pages |
| Authors:
Richard Allard; James Dykes; James Kaihatu; Dean Wakeham; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The Distributed Integrated Ocean Prediciton System (DIOPS) is a PC- based wave tide and surf prediction system designed to provide DoD accurate and timely surf predictions for essentially any world-wide location. Regional and coastal wave predictions are made by the Simulating Waves Nearshore (SWAN) wave module that is typically initialized by offshore directional wave spectra from the Fleet Numerical Meteorological and Oceanography Center (FNMOC). Tide and storm surge predictions are ... |
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| Wave Refraction Over Complex Nearshore Bathymetry |
DEC 2004 |
93 pages |
| Authors:
Scott D. Peak; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Accurate predictions of nearshore wave conditions are critical to the success of military operations in the littoral environment. Although linear spectral-refraction theory is used by the main operational forecasting centers in the world for these predictions, owing to a lack of field studies its accuracy in regions of complex bathymetry such as steep shoals and submarine canyons is unknown. This study examines the accuracy of linear spectral- refraction theory in ... |
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| Validation Test Report for the Simulating Waves Nearshore Model (SWAN): Cycle III, Version 40.11 |
02 SEP 2004 |
49 pages |
| Authors:
Richard Allard; W. E. Rogers; Suzanne N. Carroll; Kate V. Rushing; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS OCEANOGRAPHY DIV
|
| The Simulating Waves Nearshore (SWAN) wave model represents a significant improvement for the U.S. Navy s nearshore wave modeling capability. SWAN is a full-plane model allowing wave propagation from any direction. Features include variable boundary conditions, multiple coordinate system options, refraction, wave-current interaction, nesting, and numerous output options. The OpenMP version of SWAN allows the model to be run on multiple processors on shared memory platforms, greatly reducing run times. ... |
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| Larval Fish Feeding Responses to Variable Suspended Sediment and Planktonic Prey Concentrations |
SEP 2004 |
10 pages |
| Authors:
D. Colby; D. Hoss; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The purpose of this document is to understand fish feeding responses under conditions that simulate turbidity plumes and variations in prey availability enhances the ability to predict ecological impacts from dredging projects. For example, in the context of nearshore placement of mixed sediments, concerns have been raised that winnowing of fine sediments from deposited dredged material may elevate turbidity and have a detrimental impact on early life history stages of ... |
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| Impacts of Mechanical Macrophyte Removal Devices on Sediment Scouring in Littoral Habitats: I. Historical Survey of Operations in Minnesota Lakes |
SEP 2004 |
13 pages |
| Authors:
William F. James; David I. Wright; Harry L. Eakin; John W. Barko; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS
|
| The objective of this research was to evaluate the impacts of a mechanical macrophyte removal device on changes in littoral sediment substrate. |
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| Near-Shore Hydrodynamic Conditions and Chemical Plume Tracking |
22 JUL 2004 |
5 pages |
| Authors:
Derek Fong; Stephen Monismith; STANFORD UNIV CA DEPT OF CIVIL AND ENVIRONMENTAL ENGINEERING
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| We characterize the hydrodynamic conditions relevant to a bottom source plume in a nearshore environment. Analyzing a dye concentration data set collected by a state of the art autonomous underwater vehicle and fixed hydrodynamic measurements, we quantify the meandering and lateral dispersion of a plume. We find that both processes are important to ultimate plume fate and transport. The lateral dispersion is governed by a scale-dependent processes that is driven ... |
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| Hyperspectral Remote Sensing of the Coastal Ocean: Adaptive Sampling and Forecasting of Near-Shore In Situ Optical Properties |
2004 |
33 pages |
| Authors:
W. P. Bissett; FLORIDA ENVIRONMENTAL RESEARCH INST TAMPA FL
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| The ability to identify bathymetry, submerged obstacles, bottom type, or water clarity is clearly required for Mine Warfare (MIW), Mine counter Measures (MCM), and Naval Special Warfare (NSW), particularly in Very Shallow Water (VSW), riverine and estuarine environments. The HyCODE program was developed to explore 6.1 and 6.2 research into remote sensing and nowcast/ forecast systems to more fully develop the potential of environmental optics for Naval operations. FERI participated ... |
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