{"id":{"repo_id":"mit","oai_identifier":"oai:dspace.mit.edu:1721.1/73786"},"canonical_url":"https://search.dev.ndltd.org/etd/mit/oai:dspace.mit.edu:1721.1/73786","repository":{"repo_id":"mit","name":"MIT","base_url":"https://dspace.mit.edu/oai/request"},"display":{"title":"An investigation of leaky sewers as a source of fecal contamination in the stormwater drainage system in Singapore","abstract":"A preliminary investigation was conducted into possible pathways for fecal contamination to enter stormwater drains from leaky underground sewer lines in Singapore. The island's drainage channels flow into catchment reservoirs that are used to store water for future supply needs. Singapore's Public Utilities Board wishes to open up the reservoirs for recreational purposes and requires the water quality in the reservoirs to meet certain standards. Findings were assembled from the literature on sewer-groundwater interaction and Singapore's geology, the history and current state of Singapore's sewer infrastructure, the results of a groundwater model, field observations, and GIS data on the sewer and drainage network layout. It was found that sewer pipe connections between buildings and the sewer network are particularly susceptible to damage, and that high-flow-rate pathways are likely to exist between a sewer leak near a building and the small drains typically laid along the building periphery. These drains flow into a network of larger drains that eventually flow into a reservoir. Hence, sewer leaks near building connections may be a significant source of fecal contamination in the stormwater system and are worth investigating further.","abstract_html":"A preliminary investigation was conducted into possible pathways for fecal contamination to enter stormwater drains from leaky underground sewer lines in Singapore. The island's drainage channels flow into catchment reservoirs that are used to store water for future supply needs. Singapore's Public Utilities Board wishes to open up the reservoirs for recreational purposes and requires the water quality in the reservoirs to meet certain standards. Findings were assembled from the literature on sewer-groundwater interaction and Singapore's geology, the history and current state of Singapore's sewer infrastructure, the results of a groundwater model, field observations, and GIS data on the sewer and drainage network layout. It was found that sewer pipe connections between buildings and the sewer network are particularly susceptible to damage, and that high-flow-rate pathways are likely to exist between a sewer leak near a building and the small drains typically laid along the building periphery. These drains flow into a network of larger drains that eventually flow into a reservoir. Hence, sewer leaks near building connections may be a significant source of fecal contamination in the stormwater system and are worth investigating further.","abstract_has_math":false,"creators":["Doshi, Janhvi (Janhvi Manoj)"],"institution":"Massachusetts Institute of Technology","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering.","school":null,"contributors":[],"advisors":["Peter Shanahan."],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012","date_published":"2012","updated_at":"2026-07-22T22:21:14Z","subjects":["Civil and Environmental Engineering."],"languages":["eng"],"rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"rights_urls":["http://dspace.mit.edu/handle/1721.1/7582"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1721.1/73786","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Peter Shanahan."]},{"key":"dc:contributor.department","label":"Department","values":["Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering."]},{"key":"dc:contributor.other","label":"Dc Contributor Other","values":["Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering."]},{"key":"dc:creator","label":"Author","values":["Doshi, Janhvi (Janhvi Manoj)"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2012-10-10T15:45:08Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2012-10-10T15:45:08Z"]},{"key":"dc:date.issued","label":"Date","values":["2012"]},{"key":"dc:publisher","label":"Institution","values":["Massachusetts Institute of Technology"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Civil and Environmental Engineering."]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://dspace.mit.edu/handle/1721.1/7582"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1721.1/73786"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.","Cataloged from PDF version of thesis.","Includes bibliographical references (p. 47-49)."]},{"key":"dc:description.abstract","label":"Abstract","values":["A preliminary investigation was conducted into possible pathways for fecal contamination to enter stormwater drains from leaky underground sewer lines in Singapore. The island's drainage channels flow into catchment reservoirs that are used to store water for future supply needs. Singapore's Public Utilities Board wishes to open up the reservoirs for recreational purposes and requires the water quality in the reservoirs to meet certain standards. Findings were assembled from the literature on sewer-groundwater interaction and Singapore's geology, the history and current state of Singapore's sewer infrastructure, the results of a groundwater model, field observations, and GIS data on the sewer and drainage network layout. It was found that sewer pipe connections between buildings and the sewer network are particularly susceptible to damage, and that high-flow-rate pathways are likely to exist between a sewer leak near a building and the small drains typically laid along the building periphery. These drains flow into a network of larger drains that eventually flow into a reservoir. Hence, sewer leaks near building connections may be a significant source of fecal contamination in the stormwater system and are worth investigating further."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["M.Eng."]},{"key":"dc:title","label":"Title","values":["An investigation of leaky sewers as a source of fecal contamination in the stormwater drainage system in Singapore"]}]}],"canonical_facts":{"dc:contributor.advisor":["Peter Shanahan."],"dc:contributor.department":["Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering."],"dc:contributor.other":["Massachusetts Institute of Technology. Dept. of Civil and Environmental Engineering."],"dc:creator":["Doshi, Janhvi (Janhvi Manoj)"],"dc:date.accessioned":["2012-10-10T15:45:08Z"],"dc:date.available":["2012-10-10T15:45:08Z"],"dc:date.issued":["2012"],"dc:description":["Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.","Cataloged from PDF version of thesis.","Includes bibliographical references (p. 47-49)."],"dc:description.abstract":["A preliminary investigation was conducted into possible pathways for fecal contamination to enter stormwater drains from leaky underground sewer lines in Singapore. The island's drainage channels flow into catchment reservoirs that are used to store water for future supply needs. Singapore's Public Utilities Board wishes to open up the reservoirs for recreational purposes and requires the water quality in the reservoirs to meet certain standards. Findings were assembled from the literature on sewer-groundwater interaction and Singapore's geology, the history and current state of Singapore's sewer infrastructure, the results of a groundwater model, field observations, and GIS data on the sewer and drainage network layout. It was found that sewer pipe connections between buildings and the sewer network are particularly susceptible to damage, and that high-flow-rate pathways are likely to exist between a sewer leak near a building and the small drains typically laid along the building periphery. These drains flow into a network of larger drains that eventually flow into a reservoir. Hence, sewer leaks near building connections may be a significant source of fecal contamination in the stormwater system and are worth investigating further."],"dc:description.degree":["M.Eng."],"dc:identifier.uri":["http://hdl.handle.net/1721.1/73786"],"dc:language.iso":["eng"],"dc:publisher":["Massachusetts Institute of Technology"],"dc:rights":["M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission."],"dc:rights.uri":["http://dspace.mit.edu/handle/1721.1/7582"],"dc:subject":["Civil and Environmental Engineering."],"dc:title":["An investigation of leaky sewers as a source of fecal contamination in the stormwater drainage system in Singapore"],"dc:type":["Thesis"]},"updated_at":"2026-07-22T22:21:14Z"}