This page has only limited features, please log in for full access.
The implementation of green roofs as sustainable urban drainage systems provides benefits for stormwater control and the environment and is more and more encouraged. A model for the estimation of the probability of vegetation survival without irrigation is proposed. The model, developed through a probabilistic analytical derivation procedure, can also consider the effects of chained rainfall events, without the need of continuous simulation of hydrological processes. The model equations can be useful in the design of green roofs, allowing to determine the growing medium thickness in terms of an assumed risk of vegetation withering in dry periods. The proposed model is also able to identify the optimal thickness of the growing medium, over which the survival performances can be increased only with irrigation. Model performances were tested by the application to two case studies in Italy. Comparison between the probabilities and the cumulative frequencies from a continuous simulation of water content in the growing medium shows a good agreement and provide a first confirmation of reliability.
Anita Raimondi; Mariana Marchioni; Umberto Sanfilippo; Gianfranco Becciu. Vegetation Survival in Green Roofs without Irrigation. Water 2021, 13, 136 .
AMA StyleAnita Raimondi, Mariana Marchioni, Umberto Sanfilippo, Gianfranco Becciu. Vegetation Survival in Green Roofs without Irrigation. Water. 2021; 13 (2):136.
Chicago/Turabian StyleAnita Raimondi; Mariana Marchioni; Umberto Sanfilippo; Gianfranco Becciu. 2021. "Vegetation Survival in Green Roofs without Irrigation." Water 13, no. 2: 136.
The implementation of green roofs as sustainable urban drainage systems provides benefits for stormwater control and the environment and is always more encouraged. In this paper, the estimation of the probability of vegetation survival without irrigation has been proposed as a guide to choose the proper values for the design parameters; in particular the growing medium thickness has been related to the average return interval of the water content at the end of the dry period. Moreover the study represents an improvement of the analytical probabilistic approach since a chain of consecutive rainfall events has been considered, in order to take into account the possibility that the storage capacity is not completely available at the beginning of each event because of the pre-filling from more than one previous rainfall as typically happens for green roofs. Finally, developed equations have been validated by means of their application to two case studies, respectively in northern and southern Italy.
Anita Raimondi; Mariana Marchioni; Umberto Sanfilippo; Gianfranco Becciu. Vegetation Survival in Green Roofs without Irrigation. 2020, 1 .
AMA StyleAnita Raimondi, Mariana Marchioni, Umberto Sanfilippo, Gianfranco Becciu. Vegetation Survival in Green Roofs without Irrigation. . 2020; ():1.
Chicago/Turabian StyleAnita Raimondi; Mariana Marchioni; Umberto Sanfilippo; Gianfranco Becciu. 2020. "Vegetation Survival in Green Roofs without Irrigation." , no. : 1.
The current approach to stormwater management should focus on dealing with water on its source. The Sustainable Urban Drainage Systems (SuDS) promotes runoff peak flow and volume attenuation, load removal while providing amenites and biodiversities but can be difficult to apply in developed urban centers. An infiltration-exfiltration system (IES) placed on road gutters can function on receiving runoff from roads and directing them to the sewers system reducing peak flow and volume. This research follows up a full-scale test of an IES installed in São Paulo, Brazil. The IES has 49 × 1880 m dimension and a cross-section of 49 × 30 cm with a pervious concrete surface layer. The pervious concrete showed mechanical results acceptable for a low vehicular traffic and infiltration rate that allows water infiltration. Rainfall-runoff modeling showed that the proposed IES had a low effect on runoff peak flow and volume attenuation. A deeper gravel layers depth and outlet flow restrictor would improve performance. The proposed IES function on avoid ponding, promoting water treatment, and reducing inlet maintenance.
Mariana Marchioni; Gianfranco Becciu; Claudio Oliveira. Infiltration-Exfiltration System for Stormwater Control: A Full Scale Test. Proceedings 2019, 48, 11 .
AMA StyleMariana Marchioni, Gianfranco Becciu, Claudio Oliveira. Infiltration-Exfiltration System for Stormwater Control: A Full Scale Test. Proceedings. 2019; 48 (1):11.
Chicago/Turabian StyleMariana Marchioni; Gianfranco Becciu; Claudio Oliveira. 2019. "Infiltration-Exfiltration System for Stormwater Control: A Full Scale Test." Proceedings 48, no. 1: 11.
Permeable pavements have been used widely across the world to manage urban stormwater. The hydrological behaviour of permeable surfaces is a complex process affected by many factors, such as rainfall intensity, rainfall duration, pavement geometrical conditions, and clogging level of the permeable surface, amongst others. This laboratory study was carried out to assess the influence of clogging level and rainfall intensity on the infiltration capacity of porous mixture surfaces used in Permeable Pavement Systems (PPS). Porous Concrete (PC) and Porous Asphalt (PA) mixtures with different air void contents (15%, 20%, and 25%) were subject to different clogging scenarios by using varying sediment loads (0, 500, and 1000 g/m2). Permeability experiments were carried out for each clogging scenario through a new rainfall simulator specially developed, tailored, and calibrated for the laboratory simulation of a wide range of rainfall events. Permeability measurements were taken under all different scenarios as a result of the combination of the different rainfall events (50, 100, and 150 mm/h) simulated over the specimens of porous mixtures and the sediment loads applied to them. The results showed that the PC mixtures tested perform better than the PA ones in terms of infiltration capacity, showing less potential for clogging and being more easily cleaned by the wash-off produced by the simulated rainfall events.
Valerio C. Andrés-Valeri; Mariana Marchioni; Luis Angel Sañudo-Fontaneda; Filippo Giustozzi; Gianfranco Becciu. Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces. Sustainability 2016, 8, 751 .
AMA StyleValerio C. Andrés-Valeri, Mariana Marchioni, Luis Angel Sañudo-Fontaneda, Filippo Giustozzi, Gianfranco Becciu. Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces. Sustainability. 2016; 8 (8):751.
Chicago/Turabian StyleValerio C. Andrés-Valeri; Mariana Marchioni; Luis Angel Sañudo-Fontaneda; Filippo Giustozzi; Gianfranco Becciu. 2016. "Laboratory Assessment of the Infiltration Capacity Reduction in Clogged Porous Mixture Surfaces." Sustainability 8, no. 8: 751.