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Hydrological function of a thin extensive green roof in southern Sweden

Bengtsson, Lars LU ; Grahn, Lennart LU and Olsson, J (2005) In Nordic Hydrology 36(3). p.259-268
Abstract
The runoff from and the water balance of a thin extensive green roof with sedum-moss have been studied. The soil cover is about 3 cm underlain by a thin drainage layer. The water balance is determined on a monthly basis. The runoff from the green roof is much reduced compared to runoff from hard roofs because of evapotranspiration. The annual runoff is rather close to that of natural river basins. Although most rainy days there is no or little runoff from the roof, the highest observed daily runoff values are close to the daily rainfall. Runoff is initiated when the soil is at field capacity, which for the studied roof corresponds to 9 mm storage. After that, on a not very short time basis, the runoff equals the precipitation. The... (More)
The runoff from and the water balance of a thin extensive green roof with sedum-moss have been studied. The soil cover is about 3 cm underlain by a thin drainage layer. The water balance is determined on a monthly basis. The runoff from the green roof is much reduced compared to runoff from hard roofs because of evapotranspiration. The annual runoff is rather close to that of natural river basins. Although most rainy days there is no or little runoff from the roof, the highest observed daily runoff values are close to the daily rainfall. Runoff is initiated when the soil is at field capacity, which for the studied roof corresponds to 9 mm storage. After that, on a not very short time basis, the runoff equals the precipitation. The reduction of the daily runoff can be described in a simple way knowing the daily precipitation, potential evaporation and storage capacity of the green roof. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
water balance, urban runoff, green roof, sedum-moss
in
Nordic Hydrology
volume
36
issue
3
pages
259 - 268
publisher
IWA Publishing
external identifiers
  • wos:000230999700005
  • scopus:23044467795
ISSN
1996-9694
language
English
LU publication?
yes
id
198a74a5-dd98-4770-89b8-0c6d87067ce3 (old id 229545)
date added to LUP
2007-08-14 11:41:39
date last changed
2017-11-05 03:41:06
@article{198a74a5-dd98-4770-89b8-0c6d87067ce3,
  abstract     = {The runoff from and the water balance of a thin extensive green roof with sedum-moss have been studied. The soil cover is about 3 cm underlain by a thin drainage layer. The water balance is determined on a monthly basis. The runoff from the green roof is much reduced compared to runoff from hard roofs because of evapotranspiration. The annual runoff is rather close to that of natural river basins. Although most rainy days there is no or little runoff from the roof, the highest observed daily runoff values are close to the daily rainfall. Runoff is initiated when the soil is at field capacity, which for the studied roof corresponds to 9 mm storage. After that, on a not very short time basis, the runoff equals the precipitation. The reduction of the daily runoff can be described in a simple way knowing the daily precipitation, potential evaporation and storage capacity of the green roof.},
  author       = {Bengtsson, Lars and Grahn, Lennart and Olsson, J},
  issn         = {1996-9694},
  keyword      = {water balance,urban runoff,green roof,sedum-moss},
  language     = {eng},
  number       = {3},
  pages        = {259--268},
  publisher    = {IWA Publishing},
  series       = {Nordic Hydrology},
  title        = {Hydrological function of a thin extensive green roof in southern Sweden},
  volume       = {36},
  year         = {2005},
}