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 45 for “"Sewer system"”.
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An Innovative Design for a Separate Sewer System
… ago is no longer valid today. Designers of new sewer systems must identify the problems inherited from old design concepts and try to use new technology to revisit and upgrade traditional urban drainage management. Separate sewer systems are currently used in all new developments. They are more …
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Modeling of sulfide emission from the Virginia sewer system
Recognizing that attack in the sewer environment invovles five distinct processes occurring simultaneously, each with its own kinetics, any meaningful research can be effected only once the individual processes have been uncoupled and studied separately. The principal objective of this thesis is to …
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Flow routing in the parallel pipes of a combined sewer system
… and successfully applied to a twin pipe sewer system. The model predicts flow and level for each of the parallel pipes and deals with the complex behaviour which occurs at cross-connections.<br/><br/>The model DUPPERS is an enhancement of the single pipe simulation model DUCTS developed …
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Hydrologic and hydraulic modeling of the Lawrence Avenue Underflow Sewer System
The Lawrence Avenue Underflow Sewer System is a small deep tunnel system located in the Northwest part of the city of Chicago. This tunnel system connects to the Main Stream Des Plaines Tunnel and Reservoir Plan (TARP) system. This tunnel was constructed to convey and store combine sewage in an …
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Study and design of collapsable forms used on sewer system at Blacksburg, Virginia
no abstract provided by author
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Exploring the response of urban storm sewer system to the implementation of green roofs
… model (IUHM) as a base model for urban sewer system, except that the IUHM model was modified to allow the overland flow to be routed from impervious to pervious areas. A mathematical model was developed to simulate the major processes affecting the hydrologic response of green roofs …
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Hydrologic-hydraulic modeling for the dual drainage and flooding study of the Lawrence Avenue Underflow Sewer System
… runoff to exceeds the capacity of the drainage system. In the city of Chicago, the Lawrence Avenue Underflow Sewer System (LAUSS) is the first tunnel system built with the intention to capture and store sewage with the aim to prevent Combined Sewer Overflows (CSO). It is located at the …
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Development and analysis of computer aided design and drafting software for storm sewers
… personal computer that aids engineers in storm sewer design and drafting. The most unique feature of this software package is its extensive use of the AutoCAD graphics system. The software package uses AutoCAD to enter storm sewer data. Drainage areas, sewer line locations, type of structures, …
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Development of a transitioning approach to reduce surface water volumes in combined sewer systems
… and future operational scenarios of a wastewater system operating over one calendar year. Modelling scenarios were conducted removing surface water from selected areas focusing on the volumes requiring pumping and durations of pumping station(s) operation prior to treatment during storm …
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Probability based scheduling to optimize sewer maintenance
… more on the issue of SSOs (Sanitary Sewer Overflows), sewer failures have been studied much in recent years. This thesis focuses on the blockages of sewer lines, which cause nearly half of the SSOs. A simulation model is developed to analysis efficiency of different inspection …
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Re-Think the Streets: An Evaluation of Green Street Practices as a Method to Achieve Combined Sewer Separation
… the same functional benefits as conventional systems. The purpose of this research is to evaluate the effectiveness of GSI in roadside applications (i.e., “Green Streets”) to reduce combined sewer dependency and provide an alternative solution to sewer separation. Typically, roadways reach the …
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Understanding sewer infiltration and inflow using impulse response functions derived from physics-based models
… inflow (I&I) are extraneous flow in a sanitary sewer system that originate from surface water and ground water. I&I can overload the sewer system and wastewater treatment plants, and cause sanitary sewer overflows (SSOs) or basement flooding. This flow can account for as much as ten times dry …
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IMPACTS OF DIURNALLY EXPOSED SLIME LAYER HYDROGEN SULFIDE CONCENTRATIONS IN SEWER ATMOSPHERE
… (H2S) is a major issue in wastewater collection systems. H2S can cause rapid damage to wastewater infrastructure, affects the publics quality of life through odor issues and is a safety concern for sewer workers. Relatively recent development and introduction of H2S data loggers has shown that …
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Public Health and the Politics of Haussmannization in Nineteenth-Century Paris, 1830-1870
… the construction of boulevards, expansion of the sewer system, and clearance of what the state considered insalubrious housing. This term was largely prescribed to worker-class housing and used as a medical justification to target and destroy working-class communities. However, as this paper …
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Optimal management and operational control of urban sewer systems
Combined sewer networks control, like many other real world problems, is usually identified with competing and conflicting objectives. Decision makers have a great need of selecting the best possible control strategy in minimizing the combined sewer overflows (CSOs) when controlling the sewer …
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DEVELOPMENT OF A CHEMICAL FINGERPRINT FOR DETECTING UNTREATED HUMAN SEWAGE POLLUTION IN SURFACE WATER
… it contributes to the degradation of aquatic ecosystems and it could be a potential hazard to human health. Also, any pollution of surface water, which ultimately supplies drinking water, may affect the drinking water quality. Improper operation and maintenance of separate storm sewer systems are …
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Evaluation of sewer leakage into the stormwater drainage system in Singapore
… The purpose of this study was to determine if sewer leaks near building connections are a source of fecal contamination in the stormwater drainage system in Singapore. A two-step study was designed and implemented. First, water samples were collected from the downstream reaches of the …
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Machine Learning Driven Source Identification, State Estimation and Sensor Optimization in Water Systems
Water distribution and sewer systems are vital infrastructure systems that play a key role in safeguarding public health and environmental quality. In water distribution systems, operators face difficulty maintaining disinfectant residuals within a narrow range to ensure microbiological safety …
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