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 9 of 9 for “"Underground pipes"”.
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Condition Classification in Underground Pipes Based on Acoustical Characteristics. Acoustical characteristics are used to classify the structural and operational conditions in underground pipes with advanced signal classification methods
… attempted to use acoustic characteristics for underground pipe condition classification. Traditional CCTV inspection methods are relatively expensive and subjective so remote techniques have been developed to overcome this concern and increase the inspection efficiency. The acoustic environment …
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Modelling the Viability of Heat Recovery from Underground Pipes. Deterministic modelling of wastewater temperatures in a 3000 sewer pipe network
… variations in a network of 3048 sewer pipes was achieved in this project. Recovering heat from sewers presents attractive options for producing clean energy. However, heat recovery from sewerage may result in wastewater temperature drops which may reduce the influent temperature at the …
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Design and fabrication of a maneuverable robot for in-pipe leak detection
… to find the accurate location of leaks in underground pipes. However, like all in-pipe leak sensors, they need a maneuverable robot to transport them inside the pipes. In the pipe networks, the robot must be able to perform complicated movements such as sharp turns at Tee junctions. This …
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Acoustical wave propagation in buried water filled pipes
… with a specific application in water-filled underground pipes. The problem is studied in two stages: First the pipe is considered to be very stiff in relation to the contained fluid and then the stiffness of the pipe and the soil are taken into account. In both cases the solution process can …
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Development of acoustic sensor and signal processing technique.
… sensor that will be able to survey live sewer pipes. The sensor emits short coded acoustic signals which are reflected from any defects of the wall of the underground pipes and recorded for future processing. The processing algorithms are based on the temporal windowing, deconvolution, Fourier, …
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Flood Risk Analysis on Terrains
… of terrains have to be refined to incorporate underground pipes, tunnels, and waterways under bridges, but there is often uncertainty in their existence. By representing the uncertainty in the terrain data explicitly, methods for flood risk analysis that properly incorporate terrain uncertainty …
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Sustainable cities and institutional change : the transformation of urban stormwater management
… costly alternative to building more and bigger underground pipes to control polluted urban runoff and sewer overflows, as required under the Clean Water Act. Yet the extent to which cities facing very similar municipal pollution problems adopt GSI varies widely. This dissertation seeks to …
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An optimal replacement-design model for a reliable water distribution network system
… water distribution system is a network of underground pipes, usually mirroring the city street network, that connects water supply sources such as reservoirs and water towers with demand points such as residential homes, industrial sites and fire hydrants. These systems are extremely …
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A comprehensive modeling approach for urban rainfall - runoff simulation
… topic worldwide, including surface flow, underground drainage flow and especially the inevitable flow connecting with underground infrastructures in highly urbanized areas. A comprehensive modeling approach and effective mitigation measures are necessary for urban risk assessment and …