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 8 of 8 for “"manholes"”.
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Revealing the Grid
… the eye level as a 25 acre lawn with a grid of manholes, interspersed with two rows of gigantic concrete towers, is actually a water purification plant that used a slow sand filtration process (purifying water by passing it through sand and gravel) to supply potable drinking water. The grids (of …
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An Innovative Design for a Separate Sewer System
… This research presents an innovative design for manholes, created to overcome the challenges associated with the installation of separate sewer systems in narrow streets. The proposed manhole combines two traditional manholes into one structure with two separate chambers, allowing storm flow and …
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Odor control in sewers using calcium nitrate
… pH and temperature were measured at manholes on each sewer line before reaching the treatment plant and also at the headworks in the treatment plant at various times of the day. Sulfide concentrations were generally reduced to less than 0.1 ppm in all Bioxide-treated sewer lines and …
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Prediction of turbulent mixing at the interface of density stratified, shear flows using CFD
… showed that buoyant flow events around internal manholes caused a significant amount of mixing.
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Performance Review of Pipe to Structure Connections In Storm Water Infrastructure
… drainage pipes and concrete structures such as manholes and ditch bottom inlets while allowing limited movement. Although resilient connectors were installed in District 7 as early as the 2000’s, no performance evaluation had been conducted until this study.</p> <p>Inspection locations were …
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Comparing Dual Drainage Model (DDM) with SWMM: a case study in John Street watershed, Champaign IL
… comprising 26 blocks, 76 streets, 66 inlets, 68 manholes and 67 conduits. The storm water runoff from overland, on street and in sewer were compared to those in SWMM under 2-year, 10-year, 50-year and 100-year 60-minute rainfall. Hydrograph and statistical errors were used to visualize and …
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Composition and microstructure of concrete mixtures subjected to biogenic acid corrosion and their role in corrosion prediction of concrete outfall sewers
… facilities, which include outfall sewers, manholes, and treatment works, are among the key constituents of a country's infrastructure. Most of these facilities are made of concrete due to its low production costs, versatility, inherent strength and durability under most conditions. However, …
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Reduction of pollution levels in the Chatty River through Sustainable Drainage Systems: A case study of the Bethelsdorp River sub-catchment
… of point pollution for example, from overflowing manholes, which was observed to be intermittent. The extent of pollution highlighted by the water quality sampling indicated the need for mitigation measures. Hydraulic and hydrological models were constructed in PCSWMM, a stormwater management …