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 20 of 23 for “"Gravity Flow"”.
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Virginia Gravity Flow Winery: A Transformative Journey
This thesis is embodied by the design of a new gravity flow winery on the eastern slopes of the Blue Ridge Mountains in Northern Virginia. The 100 acre site is home to an existing winery with grape vines aged over a decade. From its initial inception, this thesis has been in part a response to the …
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Development of a discrete element methodology for the simulation of gravity flow of ore in ore passes
Includes bibliographical references (pages 135-149).
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Facies architecture and mechanical stratigraphy of Mississippian grainy and muddy carbonate sediment gravity-flow deposits: Rancheria Formation, Sacramento Mountains, New Mexico
Carbonate slope deposits are of considerable scientific importance, economic significance, and academic interest, but remain understudied in terms of depositional processes, facies architecture, fracture distribution, and the resultant mechanical stratigraphy. Outcrops of the Rancheria Formation in …
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Characterization of Lower Permian Carbonate Subaqueous Gravity Flows in Crockett County, Texas
… these environments lies in the allochthonous gravity flow sediments found on the slope. Here, a succession of various gravity flow deposits is used to interpret how base level fluctuations affect the type of deposits found on the slope and their effect on the deep basinal environment. This …
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Improving Open Channel Network Operation Using Gate Control Support Model Developed with ArcGIS Geoprosessing Tools
… the open channel network managers in operating flow control structures. This model presents a time schedule for gate operation based on the demands at turnouts through the water usage schedule of the network. The developed model was designed to be added as a tool to ArcToolbox in ArcGIS. Any …
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Modeling of sulfide emission from the Virginia sewer system
… sulfide emission from sewerage along the line of flow for the Virginia sewer field laboratory. Meeting this objective required both an understanding of the flow hydraulics in this sewer environment, and a model (kinetic equation) for hydrogen sulfide emission in terms of the flow characteristics. …
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Investigation of Culvert Joints Employing Large Scale Tests and Numerical Simulations
The performance of joints in buried gravity flow pipelines are important since failure of these elements can affect the structural capacity of soil-pipe systems and reduce their longevity. Currently, there are no clear guidelines to design joints for gravity flow pipelines and therefore their …
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The stratigraphy and structural evolution of the late Proterozoic Gariep belt in the Sendelingsdrif-Annisfontein area, northwestern Cape Province
… faulting produced local grabens into which massflow sediments (Kaigas Formation) and volcaniclastics (Rosh Pinah Formation) were shed. During the sea-floor spreading stage, a shallow-water carbonateclastic unit, the Hilda Sequence, was deposited. Conglomerates, quartzites, and schists with …
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GIS based optimal design of sewer networks and pump stations
… of way considerations and the desire to have flow by gravity. This research addresses the application of combined optimization-geographic information system (GIS) technology in the design process. The program developed for the design uses selected manhole locations to generate the candidate …
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Carbonate ramp to deeper shale-shelf transitions of an Upper Cambrian (Dresbachian) shelf embayment, Nolichucky Formation, southwest Virginia
… of deeper water lithologies (storm-lag, debris-flow, or other subaqueous gravity flow deposits); and shaly packstone/wackestone with trace fossils, glauconite horizons, hardgrounds, and erosion/truncation surfaces. A 15 m thick tongue of cyclic carbonates within the shale package contains …
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Evaluation of a solid-liquid manure separation operation
… system included a mechanical scraper and gravity flow system to separate manure into solid and liquid portions. The objectives of this research were to evaluate the performance of a solid-liquid separation finishing barn in improving manure nutrient management, the potential for …
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Effect of Geometric Imperfections (Wrinkles) on the Circumferential Strength of a Composite Polymer Liner for Pressure Pipes
The relining of deteriorated gravity flow and pressure pipes with polymeric liners is now popular practice. In the water industry, health concerns and challenges associated with re-opening water services in a lined small diameter pipe have limited the use of liners. Sanexen Environmental Services …
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DEPOSITIONAL SYSTEMS INTERPRETATION OF EARLY PERMIAN MIXED SILICICLASTICS AND CARBONATES, MIDLAND BASIN, TEXAS
… settling, bottom currents, or dilute density flows. In contrast, carbonate rich facies are interpreted as deposited by a spectrum of sediment gravity flow processes. Moderate to high levels of bioturbation in all clay and silt rich facies suggests dysoxic to suboxic conditions within the basin …
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Sediment Heterogeneity and Sand Production in Gas Hydrate Extraction: Daini-Atsumi Knoll, Nankai Trough, Japan
… 10 MPa) are likely to be influenced by fluid flow effects like those described by the Shields (1936) diagram. The relative density of the formation may also affect the nature of the sand production in these reservoirs. The Daini-Atsumi knoll is a structural high on the outer ridge of the …
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The effect of distance between artificial drainage facilities and disposal trenches on the movement of biological and chemical pollutants from septic tank effluent
… yet more uniform than with conventional gravity flow distribution. High sodium absorption ratios of the septic tank effluent ranging from 18 to 45 did not significantly reduce infiltration rates as no ponding of effluent in the trenches was observed. The existing land surface was sloped …
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Physiological Parameters During Perfusion Fixation of the Rat Central Nervous System for Electron Microscopy
… of cerebral cortex, perfusion pressure, and flow rate of the perfusate.</p> <p>The first portion of this investigation dealt with the problem of asphyxiation of tissues during fixation. A substituted blood containing fluorocarbon which was oxygenated served as the means to study this problem. …
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Sedimentology and Regional Implications of Fluvial Quartzose Sandstones of the Lee Formation, Central Appalachian Basin
… Steeper, giant foresets, transitional along flow with the low-angle facies, indicate that the macroform episodically developed a steep slipface. Uppermost channels within the Rockcastle Member contain macroform elements with components of lateral accretion, interpreted as deposits of …
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Novel biodegradable fibres for applications in tissue engineering and drug delivery
… from solutions in acetone under low shear (gravity flow) conditions. The tensile strength and stiffness of as-spun fibres were highly dependent on the concentration of the spinning solution. Use of a 6% w/v solution resulted in fibres having strength and stiffness of 1.8 MPa and 0.01 GPa …
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