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Runoff water quality from a green roof and in an open storm water system

Ahmed, Naeem LU (2011) In TVVR 10/5020 VVR820 20102
Division of Water Resources Engineering
Abstract
Augustenborg storm water system has become well known for its incorporation of urban green spaces. Open storm water system was developed in late 1990s by disconnecting impervious surfaces from combined sewers as a result of flooding problem in the basements after heavy rain events. The open storm water management system consists of open channels and ponds, a small wetland, green infiltration areas, green roofs, and permeable paving surfaces. The Augustenborg catchment area includes council offices, residential apartments separated by parking places, a school, courtyards and roads. This study consists of two parts. In the first one the storm water quality in Augustenborg storm water system is investigated and the degree of water pollution... (More)
Augustenborg storm water system has become well known for its incorporation of urban green spaces. Open storm water system was developed in late 1990s by disconnecting impervious surfaces from combined sewers as a result of flooding problem in the basements after heavy rain events. The open storm water management system consists of open channels and ponds, a small wetland, green infiltration areas, green roofs, and permeable paving surfaces. The Augustenborg catchment area includes council offices, residential apartments separated by parking places, a school, courtyards and roads. This study consists of two parts. In the first one the storm water quality in Augustenborg storm water system is investigated and the degree of water pollution is assessed by comparing with other studies of storm water quality in urban areas. In the second part the changes in green roof influence on runoff water quality depending on roof age are assessed by comparing current results with the previous studies on the same green roof in Augustenborg. Water samples are taken from four different locations after the four different rain events; these are rain water sample, green roof runoff sample, runoff sample from the open channel and finally the sample from the last pond situated on downstream of the Augustenborg storm water system. All samples are analysed for nutrients and heavy metals. Analysed nutrients are potassium (K), nitrate nitrogen (NO3-N), total nitrogen (Tot-N), phosphate phosphorus (PO4-P), total phosphorus (Tot-P), dissolved organic carbon (DOC) and analyzed metals are; Cd, Cu, Zn, Pb, and Ni.
The study revealed that the influence of green roof on runoff quality changes with the roof age. The major trend is that the phosphorus and potassium concentrations in roof runoff water are less the older the roof. The green roof keeps its ability to remove 60% of nitrogen from rain water so that the concentrations in green roof runoff are less than the concentrations in rain water. Regarding the open storm water system in Augustenborg the study found generally that the storm water quality was better comparing with other urban sites as found by other studies. (Less)
Please use this url to cite or link to this publication:
author
Ahmed, Naeem LU
supervisor
organization
course
VVR820 20102
year
type
H2 - Master's Degree (Two Years)
subject
publication/series
TVVR 10/5020
ISSN
ISSN-1101-9824
language
English
id
2025468
date added to LUP
2011-08-02 15:56:42
date last changed
2011-08-02 15:56:42
@misc{2025468,
  abstract     = {Augustenborg storm water system has become well known for its incorporation of urban green spaces. Open storm water system was developed in late 1990s by disconnecting impervious surfaces from combined sewers as a result of flooding problem in the basements after heavy rain events. The open storm water management system consists of open channels and ponds, a small wetland, green infiltration areas, green roofs, and permeable paving surfaces. The Augustenborg catchment area includes council offices, residential apartments separated by parking places, a school, courtyards and roads. This study consists of two parts. In the first one the storm water quality in Augustenborg storm water system is investigated and the degree of water pollution is assessed by comparing with other studies of storm water quality in urban areas. In the second part the changes in green roof influence on runoff water quality depending on roof age are assessed by comparing current results with the previous studies on the same green roof in Augustenborg. Water samples are taken from four different locations after the four different rain events; these are rain water sample, green roof runoff sample, runoff sample from the open channel and finally the sample from the last pond situated on downstream of the Augustenborg storm water system. All samples are analysed for nutrients and heavy metals. Analysed nutrients are potassium (K), nitrate nitrogen (NO3-N), total nitrogen (Tot-N), phosphate phosphorus (PO4-P), total phosphorus (Tot-P), dissolved organic carbon (DOC) and analyzed metals are; Cd, Cu, Zn, Pb, and Ni.
The study revealed that the influence of green roof on runoff quality changes with the roof age. The major trend is that the phosphorus and potassium concentrations in roof runoff water are less the older the roof. The green roof keeps its ability to remove 60% of nitrogen from rain water so that the concentrations in green roof runoff are less than the concentrations in rain water. Regarding the open storm water system in Augustenborg the study found generally that the storm water quality was better comparing with other urban sites as found by other studies.},
  author       = {Ahmed, Naeem},
  issn         = {ISSN-1101-9824},
  language     = {eng},
  note         = {Student Paper},
  series       = {TVVR 10/5020},
  title        = {Runoff water quality from a green roof and in an open storm water system},
  year         = {2011},
}