| Nearshore Sea Clutter Measurements from a Fixed Platform |
Apr 2012 |
30 pages |
| Authors:
Erin E Hackett; Anne M Fullerton; Craig F Merrill; Thomas C Fu; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV BETHESDA MD
|
 | This report describes a set of experiments performed in support of ONR's Environmental Sensing and Motion Forecast (ESMF) Program. The goal of the experiments was to obtaindata to evaluate the ability of low-grazing angle radars to provide near-field, nearreal time sea state data suitable for enabling a high-fidelity ship control system to control ship motion during Sea Basing ship-to-ship logistic operations in Sea State (SS) 4 and below. More specifically, ... |
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| Wave Reflection on a Two-Slope Steep Beach |
Mar 2012 |
49 pages |
| Authors:
David H Watson; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Wave reflection of sea-swell (0.05-0.20 Hz) energy on a two-slope (1/7.6 nearshore and 1/19 offshore) steep beach with no subaqueous sandbar is studied. The dataset were collected using a cross-shore array of 4 Acoustic Doppler Current Profilers measuring velocity and pressure at 1 Hz continuously for 40 days. Measurement of pressure and velocity at the same location allows data to be decomposed into onshore and offshore components to determine reflection. ... |
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| Automating Nearshore Bathymetry Extraction from Wave Motion in Satellite Optical Imagery |
Mar 2012 |
117 pages |
| Authors:
Steven Mancini; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| Nearshore depths for Waimanalo Beach, HI, are extracted from optical imagery, taken by the WorldView-2 satellite on 31 March 2011, by means of automated wave kinematics bathymetry (WKB). Two sets of three sequential images taken at intervals of about 10 seconds are used for the analyses herein. Water depths are calculated using a computer program that registers the images, estimates the currents, and then uses the linear dispersion relationship for ... |
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| First Year Morphological Evolution of an Artificial Berm at Fort Myers Beach, Florida |
Jan 2012 |
11 pages |
| Authors:
Katherine E Brutsche; Ping Wang; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| Maintenance dredging is a common practice in inlets and channels for navigation. As a part of regional sediment management, the dredged material is often used for nearby shore protection. One method is placing sand directly on the adjacent beach. The other is placement of a nearshore berm, i.e., to add sediment to the littoral system and/or act as a breakwater to dissipate wave energy and slow erosion (Allison and Pollock, ... |
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| An Update on Nearshore Berms in the Corps of Engineers: Recent Projects and Future Needs |
Jan 2012 |
10 pages |
| Authors:
Tanya M Beck; Julie D Rosati; James Rosati; ARMY CORPS OF ENGINEERS VICKSBURG MS ENGINEER RESEARCH AND DEVELOPMENT CENTER
|
| Dredging of Corps navigation projects results in millions of cubic yards of sediment displaced each year. Many options for placement of the material exist, including Beneficial Use through creation of islands or wetlands, upland and offshore placement, direct beach placement, and nearshore placement. In recent years, the Corps' project-centric focus has changed toward a more systematic approach that considers the sediment to be a valuable resource as part of the ... |
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| Coastal Wave Studies |
30 Sep 2011 |
6 pages |
| Authors:
Jeffrey L Hanson; Kent K Hathaway; CORPS OF ENGINEERS KITTY HAWK NC
|
| Our long-term goal is to make significant advances to coastal and nearshore wave modeling through improved understanding of coastal and nearshore wave transformation processes. The objectives of this study are to 1. Make high-fidelity measurements of wave transformation processes in the nearshore and coastal zones. Provide high-quality test cases for model development and evaluation 2. Contribute to the improvement of WaveWatch III and SWAN through the integration of a state-of- ... |
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| Incorporation of a Nearshore Hydrodynamic Model into the Unmanned Cooperative Cueing and Intervention Automated Planner |
30 Sep 2011 |
4 pages |
| Authors:
James M Kaihatu; TEXAS A AND M UNIV COLLEGE STATION DEPT OF CIVIL ENGINEERING
|
| The overall goal for this project is to incorporate the Delft3D hydrodynamic model suite into the Unmanned Cooperative Cueing and Intervention Automated Planner (UCCI). This would allow the UUV system to incorporate real-time information into its routing, and also allow for possible feedback between the modeling system and the UUV system. |
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| Modeling Water Waves with Smoothed Particle Hydrodynamics |
30 Sep 2011 |
10 pages |
| Authors:
Robert A Dalrymple; JOHNS HOPKINS UNIV BALTIMORE MD DEPT OF CIVIL ENGINEERING
|
| To improve the ability of the meshfree Lagrangian numerical method Smoothed Particle Hydrodynamics (SPH) to be a useful hydrodynamics model for breaking waves and the nearshore zone, particularly for case where spray and splash are important. To utilize the massively parallel graphics processing units on computers to develop the GPU-accelerated model GPUSPH to solve a number of problems relevant to the U.S. Navy. The science objective is to be able ... |
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| Data-Driven Boundary Correction and Optimization of a Nearshore Wave and Hydrodynamic Model to Enable Rapid Environmental Assessment |
30 Sep 2011 |
5 pages |
| Authors:
James M Kaihatu; TEXAS A AND M UNIV COLLEGE STATION DEPT OF CIVIL ENGINEERING
|
| The present project is part of a comprehensive effort by the PI, his students, and collaborators at the Naval Research Laboratory to increase the robustness and viability of the Delft3D model suite as an operational forecasting tool, and aid its continued transition to Navy forecasting centers. Prior projects have focused on determining the model s response to characteristics and sample sizes of bathymetric information. The present project focuses on determining ... |
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| Robust Littoral Characterization using Electro-Optical Sensors |
30 Sep 2011 |
6 pages |
| Authors:
Rob Holman; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
|
| The long-term goal of nearshore processes research has been to develop a predictive understanding of the fluid dynamics of a random wave field shoaling over the complicated bathymetry of a natural beach or tidal inlet, and the response of the erodible bottom to those overlying wave and current motions (Holman et al., 1990). Success requires not only knowledge of nearshore physics but also an ability to collect and incorporate input ... |
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| Multi-Scale (cm to km) Hydrodynamic and Morphologic Interactions in Tidal Inlets, Dynamics of Sandwaves with Combined Wave - Current Forcing and Mine Burial Processes, and Instrumentation for Measuring Nearshore Morphologic Change and Hydrodynamic Forcing |
30 Sep 2011 |
10 pages |
| Authors:
Peter A Traykovski; W R Geyer; WOODS HOLE OCEANOGRAPHIC INSTITUTION MA
|
| Our long terms goals are to understand sediment transport processes, the relevant physical forcing processes and the resulting morphologic evolution of river mouths and tidal inlets and shoals. Specific goals include understanding bedform characteristics (ripple to sandwave and sandbar scale) in relation to wave- and current-forced mean and turbulent flow. Objectives: 1. Quantify morphological change associated with storms and tidal forcing, and quantify the physical mechanisms causing the change (i.e., ... |
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| Wave-Mud Interactions Across the Louisiana Inner Shelf to the Shoreline |
30 Sep 2011 |
10 pages |
| Authors:
Tim T Janssen; SAN FRANCISCO STATE UNIV CA
|
| The wave-driven dynamics of the coastal ocean, which is important for transport processes, mixing and circulation, is strongly affected by mud deposits on the continental shelf and in the nearshore. However, the mechanics of wave-mud interaction and the impacts on coastal wave dynamics is not well understood. The overall objective of this work is to contribute to the understanding of the macroscale damping effects of mud on waves and to ... |
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| Efficient Non-Hydrostatic Modeling of Rotational, Turbulent, Dispersive, and Variable-Density Flows in the Vicinity of River Mouths and Inlets |
30 Sep 2011 |
11 pages |
| Authors:
Patrick J Lynett; UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES
|
| The long-range goal of this project is to develop a physics framework, and an associated numerical tool, which provides relatively rapid, phase-resolving predictions of wavy environments in the presence of strong currents and vertical stratification. The benefit of this approach, as contrasted with existing models, is that here we are able to more completely represent the nonlinear wave field, without using coarse statistical approximations, and can include the non-hydrostatic physics ... |
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| Interactions of Waves and River Plume and their Effects on Sediment Transport at River Mouth |
30 Sep 2011 |
9 pages |
| Authors:
Tian-Jian Hsu; Fengyan Shi; DELAWARE UNIV NEWARK CENTER FOR APPLIED COASTAL RESEARCH
|
| To develop a robust coastal/nearshore modeling system for river plume dynamics, sediment deposition/resuspension and inlet morphodynamics in a wave-dominated, high sediment yield and highly stratified environment. To develop a detailed wave-resolving Reynolds-Averaged Navier-Stokes model for wave-current sediment interactions in well-mixed and salt-stratified conditions. To study the interactions between tidal flow, waves and riverine outflow and their effects on sediment transport and morphodynamics using NearCOM and FVCOM. To develop parameterizations of ... |
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| Surface Wave Dynamics in the Coastal Zone |
30 Sep 2011 |
6 pages |
| Authors:
Gerbrant van Vledder; ALKYON HYDRAULIC CONSULTANCY AND RESEARCH BV EMMELOORD (NETHERLANDS)
|
| The proposed work will contribute to the improvement of existing third-generation (3G) wave models as well as to the development of the next generation of numerical wave modeling capability. The results will be applicable in the coastal zone from deep water up to and including the surf zone. Our efforts will focus on analyzing high quality datasets to support further development of the source terms for triad interactions, depth-induced wave ... |
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| STWAVE: Steady-State Spectral Wave Model User's Manual for STWAVE, Version 6.0 |
Sep 2011 |
90 pages |
| Authors:
Thomas C Massey; Mary E Anderson; Jane M Smith; Julieta Gomez; Rusty Jones; ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS COASTAL AND HYDRAULICS LAB
|
| Estimating nearshore wave transformation and wind-wave growth is a critical component of many coastal engineering projects, e.g., predicting shoreline change, designing and maintaining coastal structures, and simulating coastal storm events. Performing physical model studies or gathering field data is not always a feasible option, and, as a result, the use of numerical models for simulating these complex coastal hydrodynamics has become a universal practice. STWAVE (STeady-state spectral WAVE), a nearshore ... |
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| Surf Zone Wave and Current Dynamics |
APR 2011 |
11 pages |
| Authors:
Jeffrey L. Hanson; Kent K. Hathaway; CORPS OF ENGINEERS KITTY HAWK NC
|
| Ocean bubble production, persistence and transport results from complex interactions occurring between winds, waves, currents and the presence of biological and anthropogenic surfactants in the upper ocean (Thorpe, 1982; Hanson, 1993; Hanson, 1997; Hanson and Phillips, 1999). These processes are amplified in the surf zone as shoaling waves dissipate through interactions with local bathymetry. Existing capabilities to predict nearshore wave dissipation, sea foam and bubble formation, and resulting surf zone ... |
|
| A Comparative Evaluation of Anomaly Detection Algorithms for Maritime Video Surveillance |
Jan 2011 |
15 pages |
| Authors:
Bryan Auslander; Kalyan M Gupta; David W Aha; KNEXUS RESEARCH CORP SPRINGFIELD VA
|
| A variety of anomaly detection algorithms have been applied to surveillance tasks for detecting threats with some success. However, it is not clear which anomaly detection algorithms should be used for domains such as ground-based maritime video surveillance. For example, recently introduced algorithms that use local density techniques have performed well for some tasks, but they have not been applied to ground-based maritime video surveillance. Also, the reasons for the ... |
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| Video and Field Observations of Wave Attenuation in a Muddy Surf Zone |
2011 |
12 pages |
| Authors:
P. S. Pereira; L. J. Calliari; R. Holman; K. T. Holland; R. M. Guedes; C. K. Amorin; R. G. Cavalcanti; NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MARINE GEOACOUSTICS DIV
|
| Besides the different scales within which coastal processes manifest their energy, the majority of the world's coastal regions exhibit forms of sediment heterogeneity that are physically significant. One example of a heterogeneous environment is Cassino beach. located at the southernmost part of Brazil, a fine-grain-sized sandy beach where fluid mud sporadically is transported to the nearshore and eventually onto the beach. At this site in 2005. as part of a ... |
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| Modeling & Testing of Inflatable Structures for Rapidly Deployable Port Infrastructures |
Jul 2010 |
42 pages |
| Authors:
Andrew Bloxom; Abel Medellin; Chris Vince; Solomon Yim; NAVAL SURFACE WARFARE CENTER CARDEROCK DIV WEST BETHESDA MD
|
| An experimental investigation of the fluid-structure interaction of a water filled inflatable membrane structure in the near shore environment was performed in the Coastal Marine Engineering Laboratory at the United States Naval Academy. The structure of interest was a 10' x 2' x 0.75' tubular bag developed at the Center for Innovation in Ship Design (CISD) at the Naval Surface Warfare Center (NSWC), Carderock Division as a proof of concept ... |
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| Surf Zone Wave and Current Dynamics |
2010 |
11 pages |
| Authors:
Jeffrey L. Hanson; Kent K. Hathaway; CORPS OF ENGINEERS KITTY HAWK NC
|
| Ocean bubble production, persistence and transport results from complex interactions occurring between winds, waves, currents and the presence of biological and anthropogenic surfactants in the upper ocean (Thorpe, 1982; Hanson, 1993; Hanson, 1997; Hanson and Phillips, 1999). These processes are amplified in the surf zone as shoaling waves dissipate through interactions with local bathymetry. Existing capabilities to predict nearshore wave dissipation, sea foam and bubble formation, and resulting surf zone ... |
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| Hydrodynamics and Roughness of Irregular Boundaries |
2010 |
9 pages |
| Authors:
Geno Pawlak; HAWAII UNIV HONOLULU DEPT OF OCEAN AND RESOURCES ENGINEERING
|
| The research goals of the work target accurate parameterization and modeling of nearshore waves, currents and turbulence in complex reef environments. A central theme of this work is the response of steady and oscillating flow to highly irregular, broad-banded roughness. Previous ONR supported study by the PI's group have quantified reef roughness, examined the hydrodynamic response to a variable roughness at small scales and explored the relationship between hydrodynamic and ... |
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| Biological Response to the Dynamic Spectral-Polarized Underwater Light Field |
2010 |
25 pages |
| Authors:
Molly E. Cummings; TEXAS UNIV AT AUSTIN
|
| Camouflage in marine environments requires matching all of the background optical properties: spectral, intensity and polarization components- all of which can change dynamically in space and time. Our research investigates the biological challenge of camouflage in the near-shore littoral zone and near-surface marine environments in two distinct water types found in coastal environments around the globe (oligotrophic and eutrophic). We aim to characterize the dynamic light field along with the ... |
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| Improving the Accuracy of the SeaUV Algorithms in Dark Marine Waters |
2010 |
8 pages |
| Authors:
William L. Miller; GEORGIA UNIV ATHENS DEPT OF MARINE SCIENCES
|
| Our long-term objective is to develop a robust set of algorithms for the global ocean to provide accurate surface UV attenuation and CDOM retrieval from remotely sensed ocean color for use in optical, photochemical, and photobiological investigation. |
|
| The April 2009 Gulf of Alaska Line-Transect Survey (Goals) in the Navy Training Exercise Area |
Oct 2009 |
30 pages |
| Authors:
Brenda K Rone; Annie B Douglas; Phil Clapham; Anthony Martinez; Laura J Morse; Alexandre N Zerbini; John Calambokidis; CASCADIA RESEARCH COLLECTIVE OLYMPIA WA
|
| Little is known about the occurrence of cetaceans found in offshore waters in the Gulf of Alaska; however, whaling records and a few recent surveys have shown this area to be important habitat. The United States Navy maintains a maritime training area in the central Gulf of Alaska, east of Kodiak Island, and has requested additional information on marine mammal presence and use of this area. To determine the occurrence ... |
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| 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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| Population Structure of Island-Associated Dolphins: Evidence from Photo-Identification of Common Bottlenose Dolphins (Tursiops truncatus) in the Main Hawaiian Islands |
Apr 2009 |
25 pages |
| Authors:
Robin W Baird; Antoinette M Gorgone; Daniel J McSweeney; Allan D Ligon; Mark H Deakos; Daniel L Webster; Gregory S Schorr; Karen K Martien; CASCADIA RESEARCH COLLECTIVE OLYMPIA WA
|
| Management agencies often use geopolitical boundaries as proxies for biological boundaries. In Hawaiian waters a single stock is recognized of common bottlenose dolphins, Tursiops truncatus, a species that is found both in open water and nearshore among the main Hawaiian Islands. To assess population structure, we photo-identified 336 distinctive individuals from the main Hawaiian Islands, from 2000 to 2006. Their generally shallow-water distribution, and numerous within-year and between-year resightings within ... |
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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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| Adaptive Maritime Video Surveillance |
Jan 2009 |
14 pages |
| Authors:
Kalyan M Gupta; David W Aha; Ralph Hartley; Philip G Moore; KNEXUS RESEARCH CORP SPRINGFIELD VA
|
| Maritime assets such as ports, harbors, and vessels are vulnerable to a variety of near-shore threats such as small-boat attacks. Currently, such vulnerabilities are addressed predominantly by watchstanders and manual video surveillance, which is manpower intensive. Automatic maritime video surveillance techniques are being introduced to reduce manpower costs, but they have limited functionality and performance. For example, they only detect simple events such as perimeter breaches and cannot predict emerging ... |
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| Case-Based Collective Inference for Maritime Object Classification |
Jan 2009 |
16 pages |
| Authors:
Kalyan M Gupta; David W Aha; Philip Moore; KNEXUS RESEARCH CORP SPRINGFIELD VA
|
| Maritime assets such as merchant and navy ships, ports, and harbors are targets of terrorist attacks as evidenced by the USS Cole bombing. Conventional methods of securing maritime assets to prevent attacks are manually intensive and error prone. To address this shortcoming, we are developing a decision support system that shall alert security personnel to potential attacks by automatically processing maritime surveillance video. An initial task that we must address ... |
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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 ... |
|
| 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 ... |
|
| 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 ... |
|
| 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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| Unsteady Wave-Driven Circulation Cells Relevant to Rip Currents and Coastal Engineering |
30 SEP 2007 |
6 pages |
| Authors:
Andrew Kennedy; FLORIDA UNIV GAINESVILLE DEPT OF CIVIL AND COASTAL ENGINEERING
|
| The long term goals of this project are to predict waves, currents, sediment transport and morphological development in the nearshore ocean with accuracy and efficiency. |
|
| Toward a Predictive Model of Arctic Coastal Retreat in a Warming Climate, Beaufort Sea, Alaska |
30 SEP 2007 |
7 pages |
| Authors:
Cameron W. Wobus; Robert S. Anderson; Irina Overeem; COLORADO UNIV AT BOULDER INST OF ARCTIC AND ALPINE RESEARCH
|
| The long-term goal of this project is to build a set of process-based models of Arctic coastal evolution that will aid in prediction of future landscape and nearshore bathymetric change. Our study is focused on the Beaufort Sea coast within the National Petroleum Reserve-Alaska (NPR-A), approximately halfway between Barrow and Prudhoe Bay, Alaska. Our project will help us to identify sites along the Beaufort Sea coast that are at particular ... |
|
| Reflective Light Modulation by Cephalopods in Shallow Nearshore Habitats |
30 Sep 2007 |
7 pages |
| Authors:
Roger T Hanlon; Kenneth G Foote; MARINE BIOLOGICAL LAB WOODS HOLE MA
|
| Camouflage mechanisms are not well known despite the general misconception that they are; moreover, quantification of camouflage (especially of opaque organisms) is particularly wanting. We have three objectives: (1) Acquire imagery (camouflaged animals and their backgrounds) and corresponding irradiance data from coral reef and temperate rock reef environments. (2) Perform image analyses to quantify the degree of crypsis. (3) Construct a comparative digital photographic library of shallow-water marine animals in ... |
|
| Factors Influencing the Nearshore Sound-Scattering Layer in Hawaiian Waters |
30 Sep 2007 |
9 pages |
| Authors:
Kelly J Benoit-Bird; Margaret A McManus; OREGON STATE UNIV CORVALLIS COLL OF OCEANIC AND ATMOSPHERIC SCIENCES
|
| Our long-term goal is to develop the capability to predict the spatial dimensions and temporal occurance of aggregations of the nearshore sound-scattering layer in the coastal ocean. Our objectives are (1) to quantify aggregations of the nearshore sound-scattering layer around Hawaii, (2) to identify the physical and optical characteristics associated with these aggregations, and use this information, and (3) to develop the capability to predict the occurrence of the nearshore ... |
|
| 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). |
|
| Great Blue Herons in Puget Sound |
JUN 2007 |
37 pages |
| Authors:
Ann Eissinger; WASHINGTON DEPT OF FISH AND WILDLIFE OLYMPIA
|
| 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 ... |
|
| 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 ... |
|
| Orcas in Puget Sound |
JAN 2007 |
31 pages |
| Authors:
Birgit Kriete; CORPS OF ENGINEERS SEATTLE WA SEATTLE DISTRICT
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| 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
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| 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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