Comparative Environmental and Economic Evaluation of Green Roofs Under Mediterranean Climate Conditions – Extensive Green Roofs a Potentially Preferable Solution

2021 ◽  
pp. 127563
Author(s):  
Evangelos Koroxenidis ◽  
Theodoros Theodosiou
Keyword(s):  
Economic Evaluation ◽  
Mediterranean Climate ◽  
Green Roofs ◽  
Climate Conditions ◽  
Extensive Green Roofs

Long term experimental analysis of thermal performance of extensive green roofs with different substrates in Mediterranean climate

2019 ◽  
Vol 197 ◽  
pp. 18-33 ◽  
Author(s):  
M. Porcaro ◽  
M. Ruiz de Adana ◽  
F. Comino ◽  
A. Peña ◽  
E. Martín-Consuegra ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Experimental Analysis ◽  
Mediterranean Climate ◽  
Green Roofs ◽  
Extensive Green Roofs

scholarly journals Mediterranean Green Roof Simulation in Caldes de Montbui (Barcelona): Thermal and Hydrological Performance Test of Frankenia laevis L., Dymondia margaretae Compton and Iris lutescens Lam

2018 ◽  
Vol 8 (12) ◽  
pp. 2497 ◽  
Author(s):  
Antonio Vestrella ◽  
Carmen Biel ◽  
Robert Savè ◽  
Flavia Bartoli
Keyword(s):  
Mediterranean Climate ◽  
Performance Test ◽  
Slow Growth ◽  
Green Roof ◽  
Green Roofs ◽  
Influential Factors ◽  
Energy Costs ◽  
Climate Conditions ◽  
Green Cover ◽  
The Relationship

Green roofs provide a number of environmental advantages like increasing urban biodiversity, reducing pollution, easing burdens on drainage systems, and lowering energy costs thanks to thermal insulation. Frankenia laevis, Dymondia margaretae and Iris lutescens were tested in a green roof installation. For all three species, we assessed two minimal irrigation treatments and one rain-fed treatment to resemble Mediterranean climate conditions analyzing the thermal and hydrological performance of all three species and their substrates through an evaluation of green cover, mortality, and biomass. The most influential factors registered for all three species are the relationship between air and water in the substrate and the interaction between green cover and substrate, respectively, for summer and winter seasons. In particular, D. margaretae preserved more water in its substrate than the other species both in summer and winter and after each rainfall event. F. laevis registered the highest level of variation in terms of substrate water content and of rainwater retention. I. lutescens achieved low hydrological performance, a limited amount of green cover, and slow growth. Our results suggest the absolute need of additional irrigation, managed in accordance with specific functional objectives, for all three species analyzed under Mediterranean conditions and different water regime.

Substrate influence on aromatic plant growth in extensive green roofs in a Mediterranean climate

2017 ◽  
Vol 20 (6) ◽  
pp. 1347-1357 ◽  
Author(s):  
Cristina M. Monteiro ◽  
Cristina S. C. Calheiros ◽  
João P. Martins ◽  
Francisco M. Costa ◽  
Paulo Palha ◽  
...  
Keyword(s):  
Plant Growth ◽  
Mediterranean Climate ◽  
Green Roofs ◽  
Aromatic Plant ◽  
Extensive Green Roofs ◽  
Substrate Influence

scholarly journals Evaluation of the development of five Sedum species on extensive green roofs in a continental Mediterranean climate

2020 ◽  
Vol 48 ◽  
pp. 126566 ◽  
Author(s):  
Gabriel Pérez ◽  
Cristina Chocarro ◽  
Alejandro Juárez ◽  
Julià Coma
Keyword(s):  
Mediterranean Climate ◽  
Green Roofs ◽  
Extensive Green Roofs

scholarly journals Performance of Three Different Native Plant Mixtures for Extensive Green Roofs in a Humid Subtropical Climate Context

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3484 ◽  
Author(s):  
Giampaolo Zanin ◽  
Lucia Bortolini
Keyword(s):  
Canopy Cover ◽  
Crop Coefficient ◽  
Green Roofs ◽  
Subtropical Climate ◽  
Native Plant ◽  
Mineral Layer ◽  
Climate Conditions ◽  
Extensive Green Roofs ◽  
Stormwater Retention ◽  
Vegetation Layer

Most of the services and benefits of green roofs are related to the substrate as well as the vegetation layer. Although plant selection should be made on the basis of green roof typology, morphology, and climate conditions, very often, Sedum species only are used worldwide. However, they do not always guarantee the best performances; hence, it is important to investigate different plant species and their performance in different climate contexts. Herein, an experiment was conducted using three plant mixes (i.e., a Sedum mix, a perennial herbaceous mix, and a suffruticose mix), grown in boxes containing two substrates (a volcanic substrate or a recycled crushed brick substrate) and two drainage/storage layers (a preformed layer or a mineral layer), in factorial combination. The Sedum mix showed a high canopy cover, comparable to or even higher than that of the other mixes, particularly when supplemental irrigation was stopped. However, the actual crop coefficient (Kcact) of the herbaceous and suffruticose mixes was often higher than that of the Sedum mix. The results also showed that both the substrate and the drainage/storage layer may improve Kcact values as a consequence of their capacity for stormwater retention.

scholarly journals Hydrological Performance of Green Roofs in Mediterranean Climates: A Review and Evaluation of Patterns

Water ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 2600
Author(s):  
Joana Silva ◽  
Teresa A. Paço ◽  
Vítor Sousa ◽  
Cristina M. Silva
Keyword(s):  
Mediterranean Climate ◽  
Hydrological Cycle ◽  
Green Roof ◽  
Weather Conditions ◽  
Green Roofs ◽  
Special Focus ◽  
Monthly Precipitation ◽  
Climate Conditions ◽  
Physical Features ◽  
Substrate Depth

The capacity of green roofs to intercept rainfall, and consequently store and slow runoff resulting in a reduction in flood risk, is one of their main advantages. In this review, previous research related to the influence of green roofs on the hydrological cycle is examined with a special focus on studies for Mediterranean climate conditions (Csa and Csb according to the Köppen–Geiger climate classification). This climate is characterized by short and intense rainfall occurrences which, along with the increased area of impervious surface on Mediterranean regions, intensify the risk of flooding, particularly in the cities. The analysis covers the variables rainfall retention (R, %), runoff delay (RD, min or h), peak delay (PD, min or h), peak attenuation (PA, %), and runoff coefficient (RC, −), in relation to physical features of the green roof such as layers, substrate depth, slope, and vegetation, as well as, weather conditions, such as monthly temperature and monthly precipitation. Following a statistical analysis, some patterns for the average rainfall retention (%) were found in the published literature for green roofs under Mediterranean climate conditions—namely, that the most significant variables are related to the substrate depth, the existence of certain layers (root barrier, drainage layer), the origin of the vegetation, the types of green roofs (extensive, semi-intensive, intensive), and the precipitation and temperature of the location. Moreover, a multivariate analysis was conducted using multiple linear regression to identify the set of green roof features and weather conditions that best explain the rainfall retention (%), taking into consideration not only the studies under Mediterranean conditions but all climates, and a similar pattern emerged. Recommendations for future research include addressing the effect of physical features and weather conditions on the other variables (RD, PD, PA, RC) since, although present in some studies, they still do not provide enough information to reach clear conclusions.

THERMAL PERFORMANCE OF AN EXTENSIVE GREEN ROOF UNDER SEMI-ARID CONDITIONS IN CENTRAL ARGENTINA

2021 ◽  
Vol 16 (1) ◽  
pp. 17-42
Author(s):  
Lelia Imhof ◽  
Edgardo Suárez ◽  
Natalia Cáceres ◽  
Federico Robbiati ◽  
Cecilia Cáceres ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Green Roof ◽  
Green Roofs ◽  
Climatic Conditions ◽  
Urban Environments ◽  
Climate Conditions ◽  
Average Temperature ◽  
Arid Conditions ◽  
The Difference ◽  
Extensive Green Roofs

ABSTRACT Extensive green roofs improve the provision of ecosystem services in urban environments, particularly in semiarid regions. The aim of this paper is to compare their thermal performance during six months between two rooms, one with a green roof and the other with a conventional roof, in Córdoba (Argentina). The room with a green (planting) roof showed a lower inside surface temperature since the beginning of the study than the control room (between 5–6°C of difference). During the selected period, the indicators such as temperature amplitude (the difference between the maximum and the average temperature) and the anti-interference characteristics of the layers to the outdoor air temperature are produced a better performance for the green roof compared to the conventional roof. The pattern of a better performance was consistent across the study for the green roof, characterized by a higher cooling and warming of the roof surface during the day and night, respectively. The green roof was more effective at blocking an upward heat flux during the day and suppressing heat loss during the night. Evaporation, conductive flux and climatic conditions seem to dominate the thermal performance of green roofs in areas with semiarid climate conditions.

Sign in / Sign up

Export Citation Format

Share Document