Retention performance of green roofs in three different climate regions

Sims, Andrew W.; Robinson, C. E.; Smart, Charles C.; Voogt, James A.; Hay, Geoffrey J.; Lundholm, Jeremey T.; Powers, Brandon; O'Carroll, D. M.

doi:10.1016/j.jhydrol.2016.08.055

Cited by 94 publications

(69 citation statements)

References 24 publications

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“…No statistically significant differences were found for the rainy period. According to results obtained by Viola et al [13] and Fassman-Beck et al [15], climate regime appears to be a relevant determinant for the retention performance of GRs. …”

Section: Effect Of Event Characteristics and Rainfall Regime On Watermentioning

confidence: 88%

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

Ferrans

Rey

Pérez

et al. 2018

Water

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Green roofs (GRs) are a feasible solution for mitigating increased runoff volumes in urban areas. Though many studies have focused their analysis on the quantity and quality of GR runoff, with respect to the relevance of specific site conditions in GR performance, the information gathered for the tropical Andes is not sufficient. This study assessed the hydrological performance and runoff water quality of 12 green roof modular systems located at the Universidad de los Andes campus (Bogotá, Colombia). Based on 223 rainfall events spanning a 3-year period, average rainfall retention was 85% (coefficient of variation = 29%). t-tests, the Welch Test, multiple linear regressions, and correlation analysis were performed in order to assess the potential effect of air temperature, substrate type, vegetation cover, relative humidity, antecedent dry weather period (ADWP), rainfall duration, and rainfall maximum intensity. In some cases, GR design variables (i.e., substrate type and vegetation cover) were found to be significant for describing rainfall retention efficiencies and, depending on the GR type, some hydrological variables were also correlated with rainfall retention. Rainfall and GR runoff from 12 rainfall events were also monitored for total Kjeldahl nitrogen (TKN), nitrates, nitrites, ammonia, total phosphorus (TP), phosphates, pH, total dissolved solids (TDS), total suspended solids (TSS), color, turbidity, biological oxygen demand (BOD), chemical oxygen demand (COD), total coliforms, metals (i.e., zinc, copper, nickel, lead, selenium, aluminum, barium, boron, calcium, strontium, iron, lithium, magnesium, manganese, potassium, sodium), and polyaromatic hydrocarbons (PAHs). The results obtained confirmed that GR systems have the ability to neutralize pH, but are a source of the rest of the aforementioned parameters, excluding PAHs (with concentrations below detection limits), ammonia, TSS, selenium and lithium, where differences with control cases (rainfall and plastic panel runoff) were not statistically significant. Substrate type, event size, and rainfall regime are relevant variables for explaining runoff water quality.

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Section: Effect Of Event Characteristics and Rainfall Regime On Watermentioning

confidence: 88%

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

Ferrans

Rey

Pérez

et al. 2018

Water

View full text Add to dashboard Cite

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“…Retention is expressed as the percentage of rainfall stored in green roof and is calculated by the following formula [41]:…”

Section: Data Collection and Analysismentioning

confidence: 99%

Green Roof for Stormwater Management in a Highly Urbanized Area: The Case of Seoul, Korea

Shafique

Kim

Kyung-Ho³

2018

Sustainability

101

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Urbanization changes natural pervious surfaces to hard, impervious surfaces such as roads, buildings and roofs. These modifications significantly affect the natural hydrologic cycle by increasing stormwater runoff rates and volume. Under these circumstances, green roofs offer multiple benefits including on-site stormwater management that mimics the natural hydrologic conditions in an urban area. It can retain a large amount of rainwater for a longer time and delay the peak discharge. However, there is very limited research that has been carried out on the retrofitted green roof for stormwater management for South Korean conditions. This study has investigated the performance of retrofitted green roofs for stormwater management in a highly urbanized area of Seoul, the capital city of Korea. In this study, various storm events were monitored and the research results were analyzed to check the performance of the green roof with controlling the runoff in urban areas. Results also allowed us to conclude that the retention mainly depends on the intensity and duration of the rain events. From the analysis, average runoff retention on the green roof was 10% to 60% in different rain events. The application of an extensive green roof provides promising results for stormwater management in the highly urbanized area of Seoul.

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“…Stovin et al [43] outline the development of a conceptual hydrological flux model for the long-term continuous simulation of runoff and drought risk for green roof systems. Sims et al [44] measured the retention performance of green roofs in three different climate regions: Ontario (humid continental), Calgary (semi-arid, continental), and Nova Scotia (humid maritime). Drier climates were found to have greater cumulative stormwater retention by percentage.…”

Section: Hydrologymentioning

confidence: 99%

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

et al. 2018

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Green and blue-green roofs are emerging as an increasingly popular feature of rooftops, particularly in urban areas. Particular problematic conditions render their usage complex in the Nordic countries. In order to ensure that green roofs are built durable and with the service life expected of them, it is important to know all the relevant factors surrounding their construction and operation. A scoping study was conducted in order to gain an overview on green roof research and available scientific literature. One hundred articles of particular interest for Nordic climates were retrieved and their findings summarized. It is found that the vast majority of green roof research has been conducted on a theoretical basis, or with practical measurements on green roof test beds or isolated components. There is scarcely any literature on the operation of full-scale, building-implemented green roofs, and no articles were found on the building technical performance of aged green roofs. These knowledge gaps indicate a major risk factor in green roof operation, as their performance and integrity over time has not been documented. This despite the fact that green roofs have been implemented and in operation worldwide for decades.

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Retention performance of green roofs in three different climate regions

Cited by 94 publications

References 24 publications

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

Green Roof for Stormwater Management in a Highly Urbanized Area: The Case of Seoul, Korea

Performance of Blue-Green Roofs in Cold Climates: A Scoping Review

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