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Förslag på dagvattenhantering: En fallstudie om Okvista bussdepå
Mälardalen University, School of Business, Society and Engineering.
Mälardalen University, School of Business, Society and Engineering.
2021 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Purpose: This work aims to provide a new proposal for stormwater management in a bus depot in Okvista, Vallentuna in Stockholm. The proposal covers roof drainage as well as management and removal of heavy metals, oil and glycol in stormwater. The stormwater system is aimed to be designed based on the conditions of the facility and limit the risk of pollution spread. Method: A literature study on stormwater, various stormwater facilities and their calculation methods as well as occurring pollutants in bus depots was done for this study. Information regarding the case study, a bus depot in Okvista, has been collected through document analysis, a site visit and an interview. Calculations has also been done for the case study. Results: The proposal for roof drainage consist of two different solutions. The first solution is a green roof and rain garden. The second is plastic stormwater cassettes. The proposed stormwater treatment system consist of oil/water separator, bypass system, a well with the filter substrate granulated activated carbon and lastly a well where sampling of the water is possible. The proposal for glycol management is a raised curb and a ground slope at the heating ramp to separate the glycol from the rest of the stormwater on the site. The glycol runs down into a ditch where the degradation of glycol begins. From there, the glycol flows down to a pond equipped with and air pump. Conclusions: There are relatively few Swedish studies about this subject. Guidelines or regulations of how stormwater polluted with heavy metals and glycol should be managed, are not as clear and available as the management for oil polluted stormwater. The problem is not lack of solution but instead unclear regulations and guidelines for how and by whom these solutions should be applied. However, even though glycol contamination in bus depots is common, there is a lack of solutions for this problem. 

Place, publisher, year, edition, pages
2021. , p. 66
Keywords [en]
Stormwater, Stormwater facilites, Stormwater management, Stormwater treatment, Stormwater pollutants, Oil, Heavy metals, Glycol, Bus depot
Keywords [sv]
Dagvatten, Dagvattenanläggning, Dagvattenhantering, Dagvattenföroreningar, Tungmetaller, Glykol, Bussdepå
National Category
Engineering and Technology Civil Engineering Water Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-53539OAI: oai:DiVA.org:mdh-53539DiVA, id: diva2:1532294
External cooperation
Feron Consulting AB
Subject / course
Building Engineering
Supervisors
Examiners
Available from: 2021-03-11 Created: 2021-03-01 Last updated: 2021-03-11Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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Language
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