Journal article

Green roof storage capacity can be more important than evapotranspiration for retention performance

Zheng Zhang, Christopher Szota, Tim D Fletcher, Nicholas SG Williams, Claire Farrell

JOURNAL OF ENVIRONMENTAL MANAGEMENT | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD | Published : 2019

Abstract

Green roofs can significantly reduce stormwater runoff volumes. Plant selection is crucial to retention performance, as it is influenced by how well plants dry out substrates between rainfall events. While the role of plants in evapotranspiration (ET) on green roofs is well-studied, their potential influence on retention via their impacts on water movement through substrates is poorly understood. We used a simulated rainfall experiment with plant species with different water use strategies to determine the key drivers of green roof retention performance. Overall per-event retention was very high (89-95%) and similar for all plant species and unplanted modules for small events. However, for l..

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Grants

Awarded by Australian Research Council - Melbourne Water


Awarded by Australian Research Council - Inner Melbourne Action Plan group of local governments


Awarded by ARC


Funding Acknowledgements

Thanks to Ariane Lenhardt, Andrea Pianella, Pei-wen Chung, Joerg Werdin and Jessica Kurylo for assisting with data collection. This study was funded by Australian Research Council Linkage grant LP130100731 supported by Melbourne Water and the Inner Melbourne Action Plan group of local governments). Zheng Zhang was supported by the Melbourne International Research Scholarship (MIRS) and Melbourne International Fee Remission Scholarship (MIFRS). Fletcher was supported by an ARC Future Fellowship (FT100100144) during the early parts of this study.