@article{MAKHILLJEAS2017122114941,
    title = {Effects of Substrate Types on Runoff Retention Performance Within the
Extensive Green Roofs},
    journal = {Journal of Engineering and Applied Sciences},
    volume = {12},
    number = {21},
    pages = {5379-5383},
    year = {2017},
    issn = {1816-949x},
    doi = {jeasci.2017.5379.5383},
    url = {https://makhillpublications.co/view-article.php?issn=1816-949x&doi=jeasci.2017.5379.5383},
    author = {M.F.,M.F.,L.M. and},
    keywords = {Green roof,hydrological performance,runoff retention,substrate type,tropical,Malaysia},
    abstract = {Little is known about the water retention performances of different substrate types within extensive
green roofs in Malaysia. Thus, this research focused on the runoff retention performance within extensive green
roof system with respect to different substrate types in Malaysia. A total of six green roofs were constructed
with four being vegetated and two left unvegetated with bare soil acted as control. Four test beds were
vegetated with <i>Axonopus compressus</i> (cow grass) and <i>Portulaca grandiflora</i> cultivars (sedum) in both pot soil
and burn soil, respectively. The runoff volume was measured volumetrically through connected to an surface
runoff harvesting tank under the test beds. Water retention was calculated from the difference between rainfall
and runoff volumes from each test bed. Results showed that burn soil was the most effective substrate type
in retaining runoff water. The test bed with sedum planted in burn soil performed the best runoff retention
efficiency in extensive green roof system in Malaysia.}
    }