Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Investigating Substrate Amendments of Extensive Green Roofs for Water-Sensitive Urban Design
The world is facing severe natural hazards like extreme rainfall, extreme droughts, urban floods, urban heat islands, etc., due to disturbances in the natural hydrological cycle with the combined effect of rapid urbanization and climate change. Water-sensitive urban design (WSUD) is a strategy aimed at sustainably managing stormwater. Green roofs are being used all over the world as a WSUD tool, and they are important both for stormwater retention and detention. However, with the substrate mix used in green roofs, it can act as a stormwater pollutant basin at times, mainly as phosphorous. This research is focused on analyzing the effect of green roofs on runoff quality using six small-scale roof platforms. Zeolite and biochar have been used as substrate amendments on green roofs. They were applied to green roofs independently and as a mixture of biochar and zeolite on five green roof platforms. Rainfall–runoff data from green roofs from 30 rainfall events was observed for four months, from January to April 2023. pH, total phosphate, nitrate, and nitrite concentrations of runoff from each green roof were analyzed. Green roof substrate amended with 8% biochar and 10% zeolite has reduced the cumulative total phosphate load by 36% and the cumulative nitrate load by 57%, showing that the amendments made have substantially reduced the pollutants released from the substrate. Hence, the green roof with zeolite–biochar amendments acts as an effective measure for the absorption of the limiting nutrients.
Investigating Substrate Amendments of Extensive Green Roofs for Water-Sensitive Urban Design
The world is facing severe natural hazards like extreme rainfall, extreme droughts, urban floods, urban heat islands, etc., due to disturbances in the natural hydrological cycle with the combined effect of rapid urbanization and climate change. Water-sensitive urban design (WSUD) is a strategy aimed at sustainably managing stormwater. Green roofs are being used all over the world as a WSUD tool, and they are important both for stormwater retention and detention. However, with the substrate mix used in green roofs, it can act as a stormwater pollutant basin at times, mainly as phosphorous. This research is focused on analyzing the effect of green roofs on runoff quality using six small-scale roof platforms. Zeolite and biochar have been used as substrate amendments on green roofs. They were applied to green roofs independently and as a mixture of biochar and zeolite on five green roof platforms. Rainfall–runoff data from green roofs from 30 rainfall events was observed for four months, from January to April 2023. pH, total phosphate, nitrate, and nitrite concentrations of runoff from each green roof were analyzed. Green roof substrate amended with 8% biochar and 10% zeolite has reduced the cumulative total phosphate load by 36% and the cumulative nitrate load by 57%, showing that the amendments made have substantially reduced the pollutants released from the substrate. Hence, the green roof with zeolite–biochar amendments acts as an effective measure for the absorption of the limiting nutrients.
Investigating Substrate Amendments of Extensive Green Roofs for Water-Sensitive Urban Design
Lecture Notes in Civil Engineering
Dissanayake, Ranjith (Herausgeber:in) / Mendis, Priyan (Herausgeber:in) / De Silva, Sudhira (Herausgeber:in) / Fernando, Shiromal (Herausgeber:in) / Konthesingha, Chaminda (Herausgeber:in) / Attanayake, Upul (Herausgeber:in) / Gajanayake, Pradeep (Herausgeber:in) / Premachandra, B. P. S. A. (Autor:in) / Himanujahn, S. (Autor:in) / Fonseka, W. A. K. S. (Autor:in)
International Conference on Sustainable Built Environment ; 2023 ; Kandy, Sri Lanka
Proceedings of the 14th International Conference on Sustainable Built Environment ; Kapitel: 3 ; 33-45
28.08.2024
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
| BASE | 2019
Extensive Green Roofs/La Toiture avec Vegetalisation Extensive
| British Library Conference Proceedings | 1997