Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"tidal channel"”.
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The Porosity And Permeability Distribution Of The Shoal Grainstone And Thrombolitic Facies Of The Smackover Formation In Little Cedar Creek And Brooklyn Fields In Southwestern Alabama
… Fields categorized from top to bottom; (S-1) peritidal lime mudstone-wackestone; (S-2) tidal channel conglomeratic floatstone-rudstone; (S-3) peloid-ooid shoal grainstone-packstone (upper reservoir); (S-4) subtidal lime wackestone-mudstone; (S-5) microbially-influenced packstone-wackestone; (S-6) …
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THE VERTICAL STRUCTURE OF ESTUARINE TIDAL CURRENTS
… both theoretically and experimentally for a tidal channel in a well-mixed estuary. The theory focuses on the use of eddy viscosity models. Surface slope estimates based on tide predictions, current velocity profile measurements, and stress estimates from near bottom turbulence measurements …
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Factors influencing porosity and permeability, Wilcox Group (Eocene), Karnes County, Texas
… penetrated deposits of shoreface (with probable tidal channel and/or small (tidal?) delta), tidal flat and bay-lagoon environments. Framework grain mineralogy is similar for samples regardless of environment of deposition. The sandstones are chiefly fine to very fine and well sorted with an …
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Biophysical coupling between turbulence, veliger behavior, and larval supply
… rate over a range comparable to turbulence in a tidal inlet, and the mean larval vertical velocity shifted from upward to downward in turbulence resembling energetic nearshore areas. The larval response to turbulence was incorporated in a vertical advection-diffusion model to characterize the …
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Distribution of Foraminifera and Pollen in Coastal Depositional Environments of the Southern Delmarva Peninsula, Virginia, U.S.A.
… of species diversity and equitability than the tidal flats and the channels-inlets-shoreface. Stepwise regression analyses indicate correlation of the five most frequently occurring species in living populations (>30% of the total stations) and the seven most frequently occurring species in …
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Sedimentary Characteristics of an Estuarine Marsh System and the Roles of Storm Overwash, Micro-tidal Currents, and Organic Production: Big Branch Marsh, Louisiana
… to discern the relative influences of fluvial, tidal, and storm overwash transport dynamics of a micro-tidal estuarine marsh system. Collected sediment samples from tidal channel beds, pond bottoms, and marsh surfaces were analyzed for organic content and particle-size distribution. Parameters …
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Biophysical coupling between turbulence, veliger behavior, and larval supply
… rate over a range comparable to turbulence in a tidal inlet, and the mean larval vertical velocity shifted from upward to downward in turbulence resembling energetic nearshore areas. The larval response to turbulence was incorporated in a vertical advection-diffusion model to characterize the …
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Spatial Variability of Metals and Organic Carbon In Salt Marsh Sediment
… Due to the hydrological conditions in subtidal channel, the studied salt marsh island is composed of new sediment, deposited less than 50 years ago Winyah bay input, and older sediment originally from the mature marsh. Multivariate statistical analyses reveal that older marsh and newer …
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Long-term morphological response of tide dominated estuaries
… of the world are influenced by tides. The tidal action is a fundamental mechanism for mixing river and estuarine waters, resuspending and transporting sediments and creating bedforms. The planform of tide-dominated estuaries is characterized by a funnel-shaped geometry with a high …
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Upper Jurassic (Oxfordian) Smackover facies characterization at Little Cedar Creek Field, Conecuh County, Alabama
… top of the Smackover, the facies are: (S-1) Peritidal lime mudstone-wackestone; (S-2) tidal channel conglomeratic floatstone-rudstone; (S-3) peloid-ooid shoal grainstone-packstone; (S-4) subtidal lime wackestone-mudstone; (S-5) microbially-influenced packstone-wackestone; (S-6) microbial …
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The applicability of aerodynamic models to tidal turbines.
For the tidal current power industry to progress, simple models for predicting the performance of tidal current turbines are needed. Currently the aerodynamic models developed for wind turbines are typically used to predict tidal turbine performance. There are a number of significant differences …
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High Resolution Facies & Architectural Analysis of a Tributive, Basal Terrace of a Ferron Compound Incised Valley
… the west. A transgressive fill-succession, from tidally-influenced fluvial deposition in lower portions of the valley to tidally-dominated estuarine deposition at its top, is documented in Valley 3. High-resolution photomosaics, paired with measured sections, allowed for detailed …
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Bio-physical controls on tidal network geomorphology
Looking over a tidal wetland, the tidal network characterised by its intricate system of bifurcating, blind-ended tidal courses clearly stands out from the overall landscape. This tidal landform exerts a fundamental control on the morphology and ecology within the tidal environment. With today’s …
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Persistence of Depositional Features in a Strongly Seasonal, Tide-Dominated Delta
… we examine the idea that sediment stored in the tidal channels throughout the year is being resuspended and delivered to the mangrove platform during the dry season when sediment input to the system is at a minimum. Over two field seasons 70 shallow (cm) sediment cores were collected from the …
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Mapping and Reconstructing the Paleotsunami Record in Queule, South-Central Chile
… with dark, organic-rich, silt deposits along a tidal channel landward of a sand spit capped by eolian sand dunes. The uppermost sand layer is attributed to the tsunami from the Mw 9.5 1960 earthquake. The sand layer is widespread, tabular, oxidized, thins landward, and generally occurs at a …
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GEOLOGICAL LEGACY OF A HISTORIC WAVE-DOMINATED TIDAL INLET, CENTRAL NEW JERSEY
Tidal inlets are among the most dynamic of landforms and leave a geological legacy within coastal barrier systems. Background document analysis of the historic Cranbury Inlet (also known as New or Cranbury Inlet, New Jersey, USA), suggests much debate surrounding the years of its opening and a …
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Stratigraphy and depositional environments of the Fox Hills Formation (Upper Cretaceous), Bowman County, North Dakota
… (3) continually by currentdominated shoreline or tidal(?) channel processes (Colgate Member). In contrast to the depositional conditions that existed later to the east in the type area (i.e., deep water and subsidence or sea level rise), deposition on the southwest basin rim was characterized by …
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Effect of exposure on the erodibility of intertidal mudflats
Sediments on intertidal flats are exposed during low tides. Under the effect of exposure, the water content of sediments decreases because of the evaporation process, which alters the erosive behaviour of cohesive sediments, and therefore changes the patterns of erosion/accretion on intertidal …
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Response of barrier island fish assemblages to impacts from multiple hurricanes: assessing resilience of Chandeleur Island fish assemblages to hurricanes Ivan (2004) and Katrina (2005)
… and the possible influence that storm-generated tidal channels may have on the composition of local fish assemblages. I also compared recently collected data to historic ichthyofaunal survey data collected over thirty years ago at the Chandeleur Islands. Near shore fish assemblages changed the …