Multifunctional urban flood resilience enhancement strategies
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Thomas Telford Ltd
Abstract
Enhancing resilience in urban drainage systems (UDSs) can be achieved by implementing a range of strategies
that minimise the magnitude and duration of flooding during or after the occurrence of unexpected system failures.
Dual-purpose rainwater harvesting (RWH) systems provide a promising multifunctional resilience-enhancing
strategy due to their associated multiple benefits such as water conservation and distributed control of storm
water. However, their effectiveness in respect to minimisation of resulting flooding impacts and provision of
alternative water supplies during unexpected system failures has not been explicitly investigated at a city district or
catchment scale. This paper applies the global resilience analysis approach to investigate the effect of implementing
a set of multifunctional RWH strategies on improvement of UDS resilience to random cumulative link (sewer)
failure, using a case study of the Nakivubo system in Kampala, Uganda. The resulting water supply resilience
enhancement benefits are also investigated. The study results reveal that catchment-scale implementation of suitably
designed RWH systems provides an effective strategy that improves the system’s global resilience to flooding by
up to 25%, while simultaneously providing up to 30% of the household water supply requirements in the case
study area.
Description
Keywords
failure, floods, flood works, sustainability
Citation
Mugume, S. N., Melville-Shreeve, P., Gomez, D., & Butler, D. (2017, June). Multifunctional urban flood resilience enhancement strategies. In Proceedings of the Institution of Civil Engineers-water management (Vol. 170, No. 3, pp. 115-127). Thomas Telford Ltd.http://dx.doi.org/10.1680/jwama.15.00078