@article{048004132e8f4e1d94b6ae9072efe756,
title = "The cooling effect of irrigation on urban microclimate during heatwave conditions",
abstract = "The emergence of integrated urban water management (IUWM), provides a unique opportunity for passive evaporative cooling of urban environments. This study investigates the potential of purposefully managed irrigation for cooling benefits in a suburb of Adelaide, Australia, where IUWM is widely adopted. SURFEX was used to simulate heatwave conditions across a suburban environment. Results from two simulation periods are presented: model validation period and a heatwave case study. Model validation suggests SURFEX can broadly capture the average intra-suburban diurnal air temperature variability, but not the average maxima and minima. A range of idealised irrigation scenarios were tested with different rates and timing of watering implemented. Clear evidence was found that irrigation reduces air temperature in urban environments. The diurnal average air temperature was reduced by up to 2.3 °C. The cooling benefit of increasing irrigation was non-linear, with negligible additional cooling predicted above 20 L m −2 d −1. The magnitude of cooling was proportional to the pervious (irrigated) fraction, meaning less cooling occurred in areas with greater urban development. Although irrigation increased humidity, it still improved outdoor human thermal comfort during heatwave conditions. IUWM approaches can provide an additional fit-for-purpose water supply to the urban environment, which should be utilised for cooling benefits.",
keywords = "Integrated urban water management, Irrigation, SURFEX, TEB, Urban heat mitigation, Urban microclimate, Urban water cycle, Water sensitive urban design",
author = "Ashley Broadbent and Coutts, {Andrew M.} and Tapper, {Nigel J.} and Matthias Demuzere",
note = "Funding Information: This paper arose from PhD research funded by the Cooperative Research Centre for Water Sensitive Cities. Nigel Tapper and Andrew Coutts are funded by the Cooperative Research Centre for Water Sensitive Cities . The contribution of Matthias Demuzere is funded by the Flemish regional government through a contract as a FWO (Fund for Scientific Research) post-doctoral research fellow. We are indebted to all those who assisted during the Mawson Lakes field campaign: Andrew Coutts, Darren Hocking, Emma White, Naim Daliri-Milani, Stephen Livesley, Margaret Loughnan, Nigel Tapper, and Jason Beringer. A sincere thank you to Val{\'e}ry Masson and others at Meteo-France who assisted with SURFEX modelling. Finally, thank you to Aude Lemonsu and the two anonymous reviewers who provided valuable feedback and ideas. Funding Information: This paper arose from PhD research funded by the Cooperative Research Centre for Water Sensitive Cities. Nigel Tapper and Andrew Coutts are funded by the Cooperative Research Centre for Water Sensitive Cities. The contribution of Matthias Demuzere is funded by the Flemish regional government through a contract as a FWO (Fund for Scientific Research) post-doctoral research fellow. We are indebted to all those who assisted during the Mawson Lakes field campaign: Andrew Coutts, Darren Hocking, Emma White, Naim Daliri-Milani, Stephen Livesley, Margaret Loughnan, Nigel Tapper, and Jason Beringer. A sincere thank you to Val?ry Masson and others at Meteo-France who assisted with SURFEX modelling. Finally, thank you to Aude Lemonsu and the two anonymous reviewers who provided valuable feedback and ideas. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",
year = "2018",
month = mar,
doi = "10.1016/j.uclim.2017.05.002",
language = "English (US)",
volume = "23",
pages = "309--329",
journal = "Urban Climate",
issn = "2212-0955",
publisher = "Elsevier BV",
}