Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change.
This study assesses the phenomenon of additional water intruding into sewage sys-tems in different areas of Sweden. Additional water means in this case the non-foul water that can originate from storm water runoff, which is either supposed to be con-veyed into the pipe system or intrudes it by wrong...
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KTH, Mark- och vattenteknik
2013
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ftkthstockholm:oai:DiVA.org:kth-171826 2024-06-23T07:54:24+00:00 Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. Bauer, Göran 2013 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171826 eng eng KTH, Mark- och vattenteknik TRITA-LWR Degree Project, 1651-064X 2013:32 http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171826 info:eu-repo/semantics/openAccess additional water Inflow Infiltration sewage system modeling Sweden DHI Naturvårdsverket MIKE Urban groundwater inleakage com-bined system overflows treatment overload level of dilution Civil Engineering Samhällsbyggnadsteknik Student thesis info:eu-repo/semantics/bachelorThesis text 2013 ftkthstockholm 2024-05-27T17:49:50Z This study assesses the phenomenon of additional water intruding into sewage sys-tems in different areas of Sweden. Additional water means in this case the non-foul water that can originate from storm water runoff, which is either supposed to be con-veyed into the pipe system or intrudes it by wrongly connected drains. It can also re-sult from in-seepage of groundwater due to imperfections of the pipe system itself. It is intended to analyze how different features of the areas have an impact on the extent of this phenomenon. Further, an estimation of the conditions in future scenarios will be obtained. This includes an indication about the potential risk of a sewage system overflow, the expected volume of inflow at treatment plants and thus about the sys-tem´s suitability for the future. Numerical, hydrological compartment models for 19 cities in Sweden were set-up. The used parameters were obtained from previous studies by the Swedish Environ-mental Protection Agency. In these models present and future climate data were ap-plied. For future scenarios three different climate change projections were used which contain bias corrected climate data timeseries for each study area. The climate change scenarios were supposed to represent an "optimistic", "average" and "pessimistic" outlook. By assessing the outputs of the climate models, it was concluded that signifi-cant differences can occur, depending on exact geographical location and chosen cli-mate models. A sensitivity analysis was conducted of how geology, climate and status of the pipe system have an impact on the extent of additional water flows. It revealed that the status of the sewage system has by far the biggest impact. Finally a discharge analysis showed a potential outlook of future development of additional water flows for the chosen study sites, yielding highest increase for the sewage systems of Kiruna, Karlskoga and Sundsvall. Bachelor Thesis Kiruna Royal Institute of Technology, Stockholm: KTHs Publication Database DiVA Kiruna |
institution |
Open Polar |
collection |
Royal Institute of Technology, Stockholm: KTHs Publication Database DiVA |
op_collection_id |
ftkthstockholm |
language |
English |
topic |
additional water Inflow Infiltration sewage system modeling Sweden DHI Naturvårdsverket MIKE Urban groundwater inleakage com-bined system overflows treatment overload level of dilution Civil Engineering Samhällsbyggnadsteknik |
spellingShingle |
additional water Inflow Infiltration sewage system modeling Sweden DHI Naturvårdsverket MIKE Urban groundwater inleakage com-bined system overflows treatment overload level of dilution Civil Engineering Samhällsbyggnadsteknik Bauer, Göran Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
topic_facet |
additional water Inflow Infiltration sewage system modeling Sweden DHI Naturvårdsverket MIKE Urban groundwater inleakage com-bined system overflows treatment overload level of dilution Civil Engineering Samhällsbyggnadsteknik |
description |
This study assesses the phenomenon of additional water intruding into sewage sys-tems in different areas of Sweden. Additional water means in this case the non-foul water that can originate from storm water runoff, which is either supposed to be con-veyed into the pipe system or intrudes it by wrongly connected drains. It can also re-sult from in-seepage of groundwater due to imperfections of the pipe system itself. It is intended to analyze how different features of the areas have an impact on the extent of this phenomenon. Further, an estimation of the conditions in future scenarios will be obtained. This includes an indication about the potential risk of a sewage system overflow, the expected volume of inflow at treatment plants and thus about the sys-tem´s suitability for the future. Numerical, hydrological compartment models for 19 cities in Sweden were set-up. The used parameters were obtained from previous studies by the Swedish Environ-mental Protection Agency. In these models present and future climate data were ap-plied. For future scenarios three different climate change projections were used which contain bias corrected climate data timeseries for each study area. The climate change scenarios were supposed to represent an "optimistic", "average" and "pessimistic" outlook. By assessing the outputs of the climate models, it was concluded that signifi-cant differences can occur, depending on exact geographical location and chosen cli-mate models. A sensitivity analysis was conducted of how geology, climate and status of the pipe system have an impact on the extent of additional water flows. It revealed that the status of the sewage system has by far the biggest impact. Finally a discharge analysis showed a potential outlook of future development of additional water flows for the chosen study sites, yielding highest increase for the sewage systems of Kiruna, Karlskoga and Sundsvall. |
format |
Bachelor Thesis |
author |
Bauer, Göran |
author_facet |
Bauer, Göran |
author_sort |
Bauer, Göran |
title |
Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
title_short |
Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
title_full |
Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
title_fullStr |
Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
title_full_unstemmed |
Modeling additional waterflows in sewage systems in Sweden – An outlook on the impact of climate change. |
title_sort |
modeling additional waterflows in sewage systems in sweden – an outlook on the impact of climate change. |
publisher |
KTH, Mark- och vattenteknik |
publishDate |
2013 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171826 |
geographic |
Kiruna |
geographic_facet |
Kiruna |
genre |
Kiruna |
genre_facet |
Kiruna |
op_relation |
TRITA-LWR Degree Project, 1651-064X 2013:32 http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171826 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1802646545936416768 |