Index Catalog // ScholarsArchive@OSU

Data assimilation for prediction of shallow water flows with uncertain bathymetry

Creator:: Wilson, Gregory W.
Abstract:: A new method is introduced for incorporating bathymetric uncertainty into predictions of nearshore and river flows (i.e., unstratified flows primarily forced by pressure and radiation stress gradients). The method involves the use of the ensemble Kalman filter (EnKF) as a parameter estimation scheme, where the parameter to be estimated is...
Resource Type:: Dissertation
Full Text:: Shallow Water Flows with Uncertain Bathymetry Abstract approved: ¨ H. Tuba Ozkan-Haller A new

Field validation of a nearshore circulation model for alongshore-nonuniform flows

Creator:: Wilson, Gregory W.
Abstract:: We investigate, theoretically and experimentally, the problem of modeling depth-integrated (2DH) surf zone circulation on an alongshore-nonuniform natural beach, with waves approaching from an arbitrary angle. An approximate theoretical model is developed, which captures the important effect of advection in the alongshore dynamics, and shows that a nondimensional parameter Re[subscript]s...
Resource Type:: Masters Thesis
Full Text:: Nearshore Circulation Model for Alongshore-Nonuniform Flows Abstract approved: H. Tuba Özkan-Haller

Assessing physical vulnerability of the coast in light of a changing climate : an integrated, multi-hazard, multi-timescale approach

Creator:: Harris, Erica L.
Abstract:: Hazards threaten coastal communities and ecosystems over a wide range of spatiotemporal scales. One of the most pressing concerns for coastal property owners, decision makers, and researchers is the uncertain role that a changing climate will have on the intensity and frequency of these hazards. The significant uncertainties associated with...
Resource Type:: Masters Thesis
Full Text:: under NOAA Grant #NA06OAR4170010. To my committee members, Jonathan Allan and Tuba Ozkan-Haller

Eddy correlation benthic O₂ exchange rates and characterizations of sediment properties from the central Oregon shelf at 30 meters

Creator:: McCann-Grosvenor, Kristina
Abstract:: Rates of benthic O₂ exchange are important measurements for determining organic matter remineralization, and can shed light on factors driving biogeochemical processes in coastal environments. Measurement of in situ O₂ consumption and production within permeable sediments, such as those found over ~43% of the Oregon-Washington shelf, has traditionally been done...
Resource Type:: Masters Thesis
Full Text:: acknowledge the hard work of Tuba Özkan-Haller for all of her help with the physical oceanography

Remote sensing of radiation stress gradients from optical imagery

Creator:: Killian, Jason R.
Abstract:: Wave-induced circulation is the defining characteristic of the nearshore. Within this region, the constant feedback cycle between incoming waves, wave-generated currents, and the mobile sediment bed is responsible for the evolution of complex patterns in nearshore and beach morphology. Central to our understanding of this system is knowledge of the...
Resource Type:: Masters Thesis
Full Text:: help me finish this project, and my committee members, Mick Haller and Tuba Özkan-Haller, for their

Remote measurements of waves and currents over complex bathymetry

Creator:: Chickadel, Carmine C. (Carmine Christopher)
Abstract:: Waves are the primary input of energy in the nearshore region, and together with the currents forced through the transfer of momentum that occurs during the wave breaking process they are the principal mechanism for sediment transport in the nearshore. The basic physics of waves and currents are thought to...
Resource Type:: Dissertation
Full Text:: committee members, Tuba Ozkan-Haller for her incredible ability to teach even me, Mick Haller for his

Dune erosion models and swash zone kinematics from remote video observations

Creator:: Palmsten, Margaret L.
Abstract:: The subaerial beach, composed of sand dunes and the foreshore, provides a natural buffer zone between vulnerable land and the dissipation of storm wave energy due to wave breaking. The natural beauty of this region is attractive to people, and as a result, significant investment has been placed in this...
Resource Type:: Dissertation
Full Text:: . Once I got to Oregon State University, I was fortunate enough to be mentored by Rob and Tuba. You

Development of 2D models to estimate nearshore bathymetry and sediment transport

Creator:: Splinter, Kristen D.
Abstract:: We examine the interactions and feedbacks between bathymetry, waves, currents, and sediment transport. The ﬁrst two pro jects focus on the use of remote sensing techniques to expand our knowledge of the nearshore. Due to the plethora of snap-shot data that is available from satellites and their distribution via Google...
Resource Type:: Dissertation
Full Text:: , 2DH bar variability, a, and wave characteristics (wave height, H, wave period, T , and wave angle, θ

Predicting the longshore-variable coastal response to hurricanes

Creator:: Stockdon, Hilary F.
Abstract:: The longshore variability of the coastal response to hurricanes may be examined within the framework of a storm-impact scaling model that compares spatially-variable beach morphology and fluid forcing. The relative elevations of dune height and storm-induced water levels are used to define three impact regimes (swash, collision, and overwash), within...
Resource Type:: Dissertation
Full Text:: Dr. Tuba Ozkan-Haller, an exceptional scientist and role model, for asking the hard questions

Observations on the evolution of shoaling nonlinear internal waves in Massachusetts Bay using shipboard X-band radar

Creator:: Nelson, Brian G.
Abstract:: During four cruises in July and September of 2008 and 2009, the shipboard X-band radar was tuned to detect the modulated bands of surface roughness caused by converging and diverging currents associated with high-frequency nonlinear internal wave (NLIW) packets. The data collected was used to quantify the propagation direction (ϴp),...
Resource Type:: Masters Thesis
Full Text:: Beam Width (H): 1.23 dgrs Frequency: 9.410gHz ± 0.030 gHz Beam Width (V): 20 dgrs TR Unit: RTR-079

ScholarsArchive@OSU

Data assimilation for prediction of shallow water flows with uncertain bathymetry

Field validation of a nearshore circulation model for alongshore-nonuniform flows

Assessing physical vulnerability of the coast in light of a changing climate : an integrated, multi-hazard, multi-timescale approach

Eddy correlation benthic O₂ exchange rates and characterizations of sediment properties from the central Oregon shelf at 30 meters

Remote sensing of radiation stress gradients from optical imagery

Remote measurements of waves and currents over complex bathymetry

Dune erosion models and swash zone kinematics from remote video observations

Development of 2D models to estimate nearshore bathymetry and sediment transport

Predicting the longshore-variable coastal response to hurricanes

Observations on the evolution of shoaling nonlinear internal waves in Massachusetts Bay using shipboard X-band radar

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