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 22 for “"Flumes"”.
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Accuracy investigations of Parshall flumes and propeller meters
… accuracy at each of the four existing Parshall flumes. Tests were performed at effluent propeller meters to determine their accuracy. Hydraulic improvements are suggested for reduction of both flow disturbances and measurement errors.
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Meandering river dynamics
… correct explanation of behavior observed in flumes, where a fixed inlet leads to the long-term decay of all meanders. We show that a continuous perturbation is required for sustained meandering. With a driven perturbation at the inlet, we find that high (low) frequency driving results in …
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Behavior of Light in a Photobioreactor and Design of Light Guides
… all the factors like growth medium, gas bubble flumes, biomass concentration, and the light path length in the photobioreactor system. These experiments are used to determine the light penetration in to a photobioreactor system.</p>
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Experimental Evaluation of Three Backward Transit Time Distributions (bTTD) for Solute Storage and Release During Hyporheic Exchange
… exchange experiments conducted in laboratory flumes over a range of flow conditions, sediment grain sizes, and bedform sizes and types. Based on measures of model fit and parsimony (AICc), in all 47 experiments hyporheic exchange was best represented by either the Gamma or exponential …
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Characterization, utilization and treatment of mechanized clam processing wastes
… from splashing and overflow of tanks and flumes and from cleanup operations. Wastewater generation varied from plant to plant and at each plant over time, ranging from 80,000 gallons to almost 350,000 gallons per day and as high as 40,000 gallons per hour. The organic loading in wastewater …
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A Simple Instrument for the Measurement of the Slope and Height Distributions ofSmall Scale Wind-Driven Water Waves
… measurements in other linear wind wave flumes.
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Analysis of the Sediment Transport Capabilities of FESWMS FST2DH
… solutions. Several test cases for laboratory flumes give additional insight into the model's functionality. Finally, this thesis suggests further enhancements for the sediment capabilities of the FST2DH model and provides direction for future research of the sediment transport capabilities of …
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The response of eel, lamprey and brown trout to conditions associated with barriers to up- and downstream movement under experimental conditions in a flume
… This research demonstrated that using large flumes where volitional swimming allows natural compensatory behaviours to be undertaken, provides more realistic swimming capability information for fish pass criteria than some traditional methods (i.e. confined swim chambers). Dependent on …
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Bed shear stress under wave runup on steep slopes
… and prototype scale fixed-bed laboratory wave flumes with steep slopes (1:3 and 1:6, respectively). The hydrodynamics of swash flows were found to adhere surprisingly well to principles from classical fluid mechanics, considering they are far from the uniform, steady conditions for which the …
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Numerical simulation of an optimal channel cross-section
… observed in natural streams and laboratory flumes but not possible to explain on the basis of the threshold channel theory. Special attention is given to the area in the vicinity of the junction of the bed and bank, because of a discontinuity in the curvature of the bank profile that exists …
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Remote estimation of grain size distribution and simulating grain size effects on debris-flow rheology and post-fire variability of transport by dry ravel
… at small (2 m) and large (95 m) debris flow flumes. By integrating knowledge of post-fire changes in the grain size distribution of ravel and the size distributions of the largest particles in debris-flow deposits, a better understanding of the influence of how debris-flow composition changes …
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Near bed solids transport in combined sewers
… to model sediment transport in laboratory flumes is examined, and the application of these models is discussed. Differences between the material used in laboratory studies and that experienced in existing field studies is highlighted. Different modes of sediment transport in sewers are …
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Experimental investigation of the impact of the permeable layer thickness on the surface flow above and the threshold for incipient motion of submerged objects
… slightly larger for thicker permeable beds. Both flumes, IHFF and WHOI, were used to address the second research question. In these experiments, the threshold of incipient motion was characterized with the Shields parameter, which was estimated with upstream flow velocity measurements. A …
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Intake flow fields for a zooplankton pump sampling system
The flow fields entering intake forms oriented into a steady flume flow has been observed and quantified. This data is applied to a model of zooplankton sampler performance, to predict the fraction of the sampled fluid from which no animals will escape under conditions similar to those of the …
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The effects of groundwater seepage on stream regimen : a laboratory study
… long, 6 inches wide, and 10 inches deep. Both flumes are equipped so that groundwater seepage through the stream bed can be controlled and monitored. </p><p> In the absence of bedforms, upward (positive) seepage has little effect on stream competence or transport rate, even when quicksand …
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Experimental Study of Tsunami-Induced Loads on Bridges
… handrails). The experiments were performed in Flumes A and B. The experiments to investigate the effect of contraction on the tsunami induced pressures and forces on a box section bridge deck with wing wall and spill-through abutments were undertaken in Flume A, which had a 14 m long, 1.2 m …
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