Defining green roof detention performance

Stovin, Virginia; Vesuviano, Gianni; De-Ville, Simon. 2017 Defining green roof detention performance. Urban Water Journal, 14 (6). 574-588.

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Although it is widely accepted that the detention performance of green roofs is of interest to stormwater engineers and planners, no single metric allows detention to be unambiguously defined. Detention effects are highly sensitive to rainfall characteristics and antecedent conditions, and individual roofs typically exhibit wide variations in detention performance between storm events. This paper uses a straightforward hydrological model to explore two alternative approaches to describing detention performance: a probabilistic approach based on long time-series simulations; and a design storm approach. It is argued that the non-linear reservoir routing parameters (scale, k and exponent, n) provide fundamental descriptors of the detention process, with modelling enabling performance to be determined for specific rainfall inputs. The study utilises 30-year rainfall time-series predictions for four contrasting UK locations to demonstrate the utility of the two proposed design approaches and to comment on locational variations in detention performance.

Item Type: Publication - Article
Digital Object Identifier (DOI):
CEH Sections/Science Areas: Reynard
ISSN: 1573-062X
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL link
Additional Keywords: detention, green roof, model, reservoir routing, retention, stormwater management
NORA Subject Terms: Hydrology
Date made live: 22 Jun 2015 08:53 +0 (UTC)

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