Modelling A Green Roof Retrofit In The
Melbourne Central Business District
Author(s)
S. J. Wilkinson, C. Rose, V. Glenis & J. Lamond
Abstract
With the increasing densification in urban settlements the economic and social
disruption caused by pluvial flooding events globally is significant and growing.
Furthermore these problems are compounded where many cities are located in
areas where climate change predictions are for increased rainfall frequency
and/or intensity. One possible solution is the wide scale retrofit with green roof
technology as a means of mitigating stormwater runoff in urban settlements.
However, it is not known currently where the most effective location for and
siting of the retrofitted green roofs in a city or town would be. Moreover, the
number of and type of green roof required to reduce pluvial flooding is
unknown.
This paper describes a proof of concept framework for an assessment of the
potential to reduce pluvial flood hazard through the retrofit of green roofs
combining an evaluation of the retrofit potential of office buildings in the Central
Business District (CBD) with state-of-the-art urban rainfall inundation
modelling. Using retrofit scenarios for Melbourne CBD commercial buildings
built between 1998 and 2011 and the rainfall profile of the February 2011 event,
the modelled depths of flooding were compared. The results show that the
potential to mitigate extreme events via retrofit would be enhanced by
consideration of buildings within the wider catchment.
Keywords
flood, green roof, inundation modelling, retrofit, CBD.
Related Book
Other papers in this volume
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