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Urban stormwater management:: Optimization of the treatment of stormwater in urban areas
KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology.
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The Mulden-Rigolen system, a new urban stormwater management system implemented in Germany, has been examined in this study. The aim of this new system is to replace traditional sewer system for urban road runoff, by infiltrating the incoming water locally through a dual underground system: an active top soil layer and a deeper trench of packed gravel.

For each site using this system, the characteristics of the soils in terms of pH, texture, organic matter, infiltration rate as well as Heavy Metals (Cd, Cr, Cu, Pb, Zn) and Phosphorus soil concentrations were successfully determined. The measured values for the soil characteristics were still, after an operation time of up to 15 years for some sites, globally in the range of the recommendation of the German Association for Water, Wastewater and Waste, except for organic matter in some sites, suggesting the need for a more cautious maintenance.

Concerning heavy metals and phosphorus content, no alarming soil contamination was observed indicating that the studied “Mulden-Rigolen” systems were still acceptable in terms of soil pollution after several years of use, according to the Danish standards. If this system seemed to have a good flexibility and adaptability to different urban land uses, its treatment efficiency still has to be fully assessed. Indeed, only a primary evaluation of its performance war carried out through a simplistic model which brought up some questions about pollutant retention (especially in case of Zn). Further research (intact soil columns experiments, sequential extractions, on-site runoff sampling) would be necessary to fully determine how well this system works in terms of water treatment.

Place, publisher, year, edition, pages
2010.
Series
Trita-IM, ISSN 1402-7615 ; 2010:12
Keyword [en]
stormwater management, stormwater treatment, Mulden-Rigolen system, Germany, soil contamination
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-58645OAI: oai:DiVA.org:kth-58645DiVA: diva2:473728
Uppsok
Technology
Supervisors
Examiners
Available from: 2012-01-13 Created: 2012-01-07 Last updated: 2012-01-13Bibliographically approved

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