| Title | GREEN ROOFS AND ECOSYSTEM SERVICES: RUNOFF WATER QUALITY AND QUANTITY |
| Abstract | The I-ZEB Project (Intelligent Zero Energy Buildings) was recently approved within the third framework agreement between Lombardy Region and National Research Council with the main aim of providing technological solutions and innovative materials in buildings from an energy, environmental and structural point of view. Among the proposed strategies, vegetated roofs are becoming a widespread technology in our cities in a NZEB (Nearly Zero Energy Buildings) perspective, since they increase thermal insulation, inertia and evapotranspiration of roof and they contribute to the reduction of the building energy demand for heating and cooling. Besides, they provide many ecosystem services in densely populated areas, such as reduction of stormwater runoff, mitigation of urban heat island effect and noise pollution, aesthetic improvement. A less investigated aspect is the contribution to the reduction of urban runoff pollution by absorbing pollutants present in wet and dry atmospheric deposition. Recent researches showed that during periods of intense evapotranspiration, water-soluble substances may be absorbed in the vegetated roof reducing the pollution transfer to the environment. Contaminant concentrations in green roof runoff may be comparable to those found in precipitation (e.g. nitrogen, trace elements), but the strong capability of these roofs to reduce annual runoff may result in a significant reduction of the total pollutant load. Notwithstanding this, if not correctly designed, vegetated roofs may contribute to water pollution by releasing contaminants from soil, fertilizers or drainage systems. For example, significant release of nutrients, DOC and some trace elements were emphasized. The potential of providing ecosystem services in terms of water quality are strongly determined by the green roof type/arrangement and by local climatic conditions. A direct experimental research in Milan will clarify the potential of this technology in a metropolitan area. |
| Source | S.It.E. 2017, XXVII Congresso Nazionale della Società Italiana di Ecologia, La ricerca ecologica in un mondo che cambia, Complesso di SS. Marcellino e Festo, Largo San Marcellino 10, Napoli, 12-15/09/2017 |
| Keywords | urban runoff pollutiongreen roofexperimental research |
| Year | 2017 |
| Type | Poster |
| Authors | L. Marziali, D. Copetti, F. Salerno, S. Novati, B. Barozzi, A. Bellazzi, L.Valsecchi, L. Guzzella, G. Tartari, I. Meroni |
| Text | 376269 2017 urban runoff pollution green roof experimental research GREEN ROOFS AND ECOSYSTEM SERVICES RUNOFF WATER QUALITY AND QUANTITY L. Marziali, D. Copetti, F. Salerno, S. Novati, B. Barozzi, A. Bellazzi, L.Valsecchi, L. Guzzella, G. Tartari, I. Meroni IRSA CNR ITC CNR The I ZEB Project Intelligent Zero Energy Buildings was recently approved within the third framework agreement between Lombardy Region and National Research Council with the main aim of providing technological solutions and innovative materials in buildings from an energy, environmental and structural point of view. Among the proposed strategies, vegetated roofs are becoming a widespread technology in our cities in a NZEB Nearly Zero Energy Buildings perspective, since they increase thermal insulation, inertia and evapotranspiration of roof and they contribute to the reduction of the building energy demand for heating and cooling. Besides, they provide many ecosystem services in densely populated areas, such as reduction of stormwater runoff, mitigation of urban heat island effect and noise pollution, aesthetic improvement. A less investigated aspect is the contribution to the reduction of urban runoff pollution by absorbing pollutants present in wet and dry atmospheric deposition. Recent researches showed that during periods of intense evapotranspiration, water soluble substances may be absorbed in the vegetated roof reducing the pollution transfer to the environment. Contaminant concentrations in green roof runoff may be comparable to those found in precipitation e.g. nitrogen, trace elements , but the strong capability of these roofs to reduce annual runoff may result in a significant reduction of the total pollutant load. Notwithstanding this, if not correctly designed, vegetated roofs may contribute to water pollution by releasing contaminants from soil, fertilizers or drainage systems. For example, significant release of nutrients, DOC and some trace elements were emphasized. The potential of providing ecosystem services in terms of water quality are strongly determined by the green roof type/arrangement and by local climatic conditions. A direct experimental research in Milan will clarify the potential of this technology in a metropolitan area. Published version S.It.E. 2017, XXVII Congresso Nazionale della Societa Italiana di Ecologia, La ricerca ecologica in un mondo che cambia Complesso di SS. Marcellino e Festo, Largo San Marcellino 10, Napoli 12 15/09/2017 Internazionale Contributo Poster lucia.valsecchi VALSECCHI LUCIA gianni.tartari TARTARI GIANNI NOVATI STEFANO liciamaria.guzzella GUZZELLA LICIA MARIA diego.copetti COPETTI DIEGO franco.salerno SALERNO FRANCO benedetta.barozzi BAROZZI BENEDETTA alice.bellazzi BELLAZZI ALICE italo.meroni MERONI ITALO laura.marziali MARZIALI LAURA SP.P04.003.001 Soluzioni tecnologiche, metodologie e strumenti per il miglioramento della sostenibilita energetico ambientale ed acustica e dell utilizzo degli edifici. TA.P04.021.007 Diffusione, ripartizione, bioaccumulo e trasformazione di inquinanti in ecosistemi acquatici |
