Identifying keystone meteorological factors of green-roof stormwater retention to inform design and planning

Wong, Gwendolyn K.L.; Jim, Chi Yung

doi:10.1016/j.landurbplan.2015.07.001

Cited by 46 publications

(17 citation statements)

References 30 publications

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“…For example, while evapotranspiration has been identified as important mechanism affecting runoff volume storage and reduction (e.g., Harper et al, 2015), seasonal variation in hydrologic performance as observed by Nawaz et al (2015) was thought to be linked with seasonal differences in rainfall distribution than seasonal changes in evaporative demand. Despite variability in configurations of the greenroofs reviewed herein, the study authors generally point to antecedent moisture conditions of the media as the most important factor controlling hydrologic performance on an event-by-event basis (e.g., Lee, Lee and Han, 2015;Poë et al, 2015;Wong and Jim, 2015).…”

Section: Field Laboratory and Modeling Hydrologicmentioning

confidence: 99%

Urban Stormwater Characterization, Control, and Treatment

Vogel

Moore²

2016

Water Environment Research

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The following review presents a synthesis of 181 journal articles published during 2015 that represent progress toward better characterizing, controlling, and treating urban stormwater runoff. The review is structured by general topical areas related to (1) stormwater quality and quantity characterization; (2) engineered stormwater control and treatment practices, including erosion and sediment control, stormwater ponds, constructed stormwater wetlands, bioretention, permeable pavement, greenroofs, and rainwater harvesting systems; and (3) watershed-scale modeling and optimization of stormwater control and treatment practices. Common research themes emerging from this collection of studies include potential to enhance hydrologic and pollutant treatment performance of stormwater practices via media amendments and the use of innovative outlet control structures, as well as development of a more mechanistic understanding of hydrologic and water-quality functions to inform modeling and performance predictions. These studies serve to expand the field's knowledge base and will inform future efforts to further improve stormwater control and treatment at various spatial and temporal scales.

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Section: Field Laboratory and Modeling Hydrologicmentioning

confidence: 99%

Urban Stormwater Characterization, Control, and Treatment

Vogel

Moore²

2016

Water Environment Research

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“…Field test results from the study of a treatment train, consisting of three grassed swales, a buffer strip, bioretention cell, infiltration pits, and a constructed wetland in China are presented by Jia et al (2015), indicating effective combination of treatment technologies for the reduction of peak flows and volume of runoff as well as improvement of water quality including nitrogen, phosphorus, TSS and metals. Two green roofs and a bare, unplanted, roof in Hong Kong were compared finding that the peanut plot had higher evapotranspiration than Sedum (Jim, 2015).…”

Section: Performance Monitoring Of Gi/lid Systemsmentioning

confidence: 99%

“…Evapotranspiration from a green roof was described using a regression approach of meteorological conditions identifying onsite factors of importance for determining green roof hydrologic performance including rainfall depth, wind speed, solar radiation and antecedent conditions under humid sub-tropical conditions (Wong and Jim, 2015 recommendations are provided.…”

Section: Water Quality Modelingmentioning

confidence: 99%

Sustainability

Chang

DiGiovanni

Mei

et al. 2016

Water Environment Research

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This review on Sustainability covers selected 2015 publications on the focus of Sustainability. It is divided into the following sections : • Sustainable water and wastewater utilities • Sustainable water resources management • Stormwater and green infrastructure • Sustainability in wastewater treatment • Life cycle assessment (LCA) applications • Sustainability and energy in wastewater industry, • Sustainability and asset management.

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“…Several studies on the hydrological properties of green roofs have shown a range of average rainwater retention efficiencies (Table 1). The prominent differences observed between extensive green roofs retention values can be attributed to the slope of the green roof (CATALANO et al, 2016), the type and depth of the substrate used (LEE et al, 2015;BUCKLAND-NICKS et al, 2016), green roof design (VANUYTRECHT et al, 2014), characteristics of rain events (intensity and duration) (VOLDER & DVORAK, 2014;ZHANG et al, 2015), weather conditions, climate and season (BERNDTSSON, 2010;WONG & JIM, 2015). In addition to these factors, vegetation composition also has an important influence on green roof hydrological performance.…”

Section: Introductionmentioning

confidence: 99%

Water quantity investigation of simulated green roofs in a tropical climate: influence of vegetation composition

Vacari

Lara

Lima

et al. 2019

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Green roofs are recognized as a sustainable infrastructure to improve the environmental quality of cities. Among many benefits, green roofs reduce the rate and volume of runoff helping to improve rainwater management. This study investigated the runoff retention capacity of three pilot extensive green roof assemblies with different vegetation (grass, shrub and intercropping of the two plants). Rainwater runoff data were collected for 18 rainfall events that ranged from a minimum of 1.6 mm to a maximum of 157.9 mm. Average precipitation event retention efficiencies were 46.7, 59.7 and 61.6% for intercropped, shrub and grass green roofs, respectively, while the annual runoff retention rates were 43.8, 57.3 and 59.7%. The difference in retention rates for the green roofs with different vegetation was not statistically significant. The rainfall intensity influenced the retention rates, with the highest retentions for small events (<10.0 mm) followed by medium (10.0-24.9 mm). Retention was found to correspond significantly to rainfall depths. On the other hand, regression analysis failed to provide a relationship between retention and antecedent dry weather period (ADWP). The organic soil used as substrate appears to be the deciding factor for rainwater retention.

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Identifying keystone meteorological factors of green-roof stormwater retention to inform design and planning

Cited by 46 publications

References 30 publications

Urban Stormwater Characterization, Control, and Treatment

Urban Stormwater Characterization, Control, and Treatment

Sustainability

Water quantity investigation of simulated green roofs in a tropical climate: influence of vegetation composition

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