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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 42 for “"weirs"”.
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Leaping weirs and overflow weirs for sewers
Made available in DSpace on 2017-11-30T22:11:17Z (GMT). No. of bitstreams: 2 5995007.pdf: 12391999 bytes, checksum: e902d21192974d8455c5ae2e2e504ab4 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1917
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Triangular weirs
Made available in DSpace on 2017-11-30T22:46:20Z (GMT). No. of bitstreams: 2 5178671.pdf: 5093784 bytes, checksum: a997b613475648c1e5a0a6590143c9f7 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1877
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Estimating Flow Through Rock Weirs
Rock weirs are small dam-like structures composed of large loose rock commonly found in ecological engineering design. By appearing more natural than concrete structures, rock weirs are preferred for use as hydraulic control structures in river engineering, stormwater management, and constructed …
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Discharge coefficients for submerged, broad-crested weirs.
Thesis: M.S., Massachusetts Institute of Technology, Department of Civil Engineering, 1966
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Discharge coefficients for broad-crested weirs of low aspect ratios
… of the discharge coefficient for broad-crested weirs is investigated. Experimentally determined discharge coefficients are presented for a broad-crested weir of small crest width in an attempt to verify the theory, and an investigation of the geometry of the weir crest separation zone using a …
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Assessing the influence of low head weirs and low head ‘on weir’ hydropower on the phytobenthic biofilm
… head ‘on weir’ schemes are fitted on existing weirs which have already potentially altered the aquatic environment, there is the chance that adding a hydro scheme to a weir could in fact improve the aquatic environment and provide benefits for ecology whilst also providing meaningful amounts of …
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Effectiveness of weirs on the New River in retarding rapid releases from Claytor Lake Dam at Big Falls
… limited, if not non-existent. The placement of weirs between the dam and dangerous sections would retard the flow—slowing the rise in water levels and decreasing velocities at predetermined dangerous sections. Big Falls, on the New River near McCoy, Virginia, is a popular recreation spot and …
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Surrogate-based optimization of a BioMEMs microfluidic weir
BioMEM microfluidic weirs enable biologists to study biological processes at the cell level. A novel substrate-affixed microfluidic array of weirs allows active sorting of cells via control electrodes. The ability of the weirs to retain cells hydrodynamically is vital to the functionality of the …
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Movement ecology of two threatened anadromous species, twaite shad Alosa fallax and sea lamprey Petromyzon marinus, revealed by acoustic telemetry.
… ecosystems due to man-made barriers (e.g. dams, weirs) poses a major threat to biodiversity, and has driven population declines and extirpations of once-abundant anadromous species. Understanding the movement ecology of anadromous species during all phases of their lifecycle is vital to …
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Hydraulic and biological aspects of fish passes for dams
… structures including vertical slots, orifices, weirs and combinations of all three. Direct comparisons of the efficiency of each type of fish pass in terms of upstream migration. Two identical physical models were constructed, one at the Fisheries Research Services Freshwater Laboratory at …
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Hydrodynamics and Morphodynamics in Kinoshita Meandering Channels
… the hydrodynamics of meander bends with bendway weirs (for streambank protection) is present. Field measurements (Sugar creek, Illinois) and numerical simulations were performed to validate the Computational Fluid Dynamic (CFD) model at low-flow conditions. Then, additional simulations were …
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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
… fish. The fish responses to a variety of model weirs and screens placed in the flume were assessed, allowing attainment of species and life-stage specific swimming capability and behavioural information. This research demonstrated that using large flumes where volitional swimming allows natural …
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Using environmental DNA metabarcoding to monitor fish biodiversity and assess anthropogenic barrier impacts on the river Mersey, UK
… anthropogenic threats worldwide. Dams and weirs, for example, create habitat fragmentation, changing water flow and water levels, blocking crucial nutrients passing through river systems, and, above all, preventing crucial movements and migrations of aquatic organisms. Fish passes alleviate …
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Monitoring of storm sewer overflows
… for periods from 9 to 13 months (two high-side weirs, one low-side weir and a stilling pond). Each overflow was monitored with continuous flow measurement equipment and bottle samplers to obtain samples of sewage from the storm and dry weather flows. The bottle samples were analysed for …
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Assessment of Sediment Runoff from Natural Gas Well Development Sites.
… development sites by collecting it in traps and weirs, and by measuring sediment debris lobes. Sediment primarily consisted of silt and clay sized particles. Sediments from two gas well sites formed five debris lobes that ranged in size from 325 to 3,290 square feet. Sediment loadings estimated …
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Split-flow Stormwater Management Strategy Design Feasibility and Cost Comparison
… by development by using bioretention and paired weirs as proportional flow splitters connected to small infiltration facilities distributed throughout a site. Results show that 1) the distributed split-flow stormwater management strategy can provide a higher level of environmental protection at …
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