High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation

Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the...
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Autor*in:	Fellini, Sofia [verfasserIn] Marro, Massimo [verfasserIn] Del Ponte, Annika Vittoria [verfasserIn] Barulli, Marilina [verfasserIn] Soulhac, Lionel [verfasserIn] Ridolfi, Luca [verfasserIn] Salizzoni, Pietro [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2022

Schlagwörter:	Urban vegetation Street canyon ventilation Air pollution Street trees

Übergeordnetes Werk:	Enthalten in: Building and environment - New York, NY [u.a.] : Elsevier, 1976, 226
Übergeordnetes Werk:	volume:226

DOI / URN:	10.1016/j.buildenv.2022.109763

Katalog-ID:	ELV008793859

Internformat


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520			\|a Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees.
650		4	\|a Urban vegetation
650		4	\|a Street canyon ventilation
650		4	\|a Air pollution
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700	1		\|a Marro, Massimo \|e verfasserin \|4 aut
700	1		\|a Del Ponte, Annika Vittoria \|e verfasserin \|4 aut
700	1		\|a Barulli, Marilina \|e verfasserin \|4 aut
700	1		\|a Soulhac, Lionel \|e verfasserin \|4 aut
700	1		\|a Ridolfi, Luca \|e verfasserin \|4 aut
700	1		\|a Salizzoni, Pietro \|e verfasserin \|4 aut
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Indexfelder

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matchkey_str	article:03601323:2022----::iheouinidunlnetgtoaothefcosretesnoltncneta
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publishDate	2022
allfields	10.1016/j.buildenv.2022.109763 doi (DE-627)ELV008793859 (ELSEVIER)S0360-1323(22)00993-3 DE-627 ger DE-627 rda eng 690 DE-600 56.00 bkl Fellini, Sofia verfasserin (orcid)0000-0003-3010-4348 aut High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees. Urban vegetation Street canyon ventilation Air pollution Street trees Marro, Massimo verfasserin aut Del Ponte, Annika Vittoria verfasserin aut Barulli, Marilina verfasserin aut Soulhac, Lionel verfasserin aut Ridolfi, Luca verfasserin aut Salizzoni, Pietro verfasserin aut Enthalten in Building and environment New York, NY [u.a.] : Elsevier, 1976 226 Online-Ressource (DE-627)300188773 (DE-600)1481962-4 (DE-576)104402504 0360-1323 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.00 Bauwesen: Allgemeines AR 226
spelling	10.1016/j.buildenv.2022.109763 doi (DE-627)ELV008793859 (ELSEVIER)S0360-1323(22)00993-3 DE-627 ger DE-627 rda eng 690 DE-600 56.00 bkl Fellini, Sofia verfasserin (orcid)0000-0003-3010-4348 aut High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees. Urban vegetation Street canyon ventilation Air pollution Street trees Marro, Massimo verfasserin aut Del Ponte, Annika Vittoria verfasserin aut Barulli, Marilina verfasserin aut Soulhac, Lionel verfasserin aut Ridolfi, Luca verfasserin aut Salizzoni, Pietro verfasserin aut Enthalten in Building and environment New York, NY [u.a.] : Elsevier, 1976 226 Online-Ressource (DE-627)300188773 (DE-600)1481962-4 (DE-576)104402504 0360-1323 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.00 Bauwesen: Allgemeines AR 226
allfields_unstemmed	10.1016/j.buildenv.2022.109763 doi (DE-627)ELV008793859 (ELSEVIER)S0360-1323(22)00993-3 DE-627 ger DE-627 rda eng 690 DE-600 56.00 bkl Fellini, Sofia verfasserin (orcid)0000-0003-3010-4348 aut High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees. Urban vegetation Street canyon ventilation Air pollution Street trees Marro, Massimo verfasserin aut Del Ponte, Annika Vittoria verfasserin aut Barulli, Marilina verfasserin aut Soulhac, Lionel verfasserin aut Ridolfi, Luca verfasserin aut Salizzoni, Pietro verfasserin aut Enthalten in Building and environment New York, NY [u.a.] : Elsevier, 1976 226 Online-Ressource (DE-627)300188773 (DE-600)1481962-4 (DE-576)104402504 0360-1323 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.00 Bauwesen: Allgemeines AR 226
allfieldsGer	10.1016/j.buildenv.2022.109763 doi (DE-627)ELV008793859 (ELSEVIER)S0360-1323(22)00993-3 DE-627 ger DE-627 rda eng 690 DE-600 56.00 bkl Fellini, Sofia verfasserin (orcid)0000-0003-3010-4348 aut High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees. Urban vegetation Street canyon ventilation Air pollution Street trees Marro, Massimo verfasserin aut Del Ponte, Annika Vittoria verfasserin aut Barulli, Marilina verfasserin aut Soulhac, Lionel verfasserin aut Ridolfi, Luca verfasserin aut Salizzoni, Pietro verfasserin aut Enthalten in Building and environment New York, NY [u.a.] : Elsevier, 1976 226 Online-Ressource (DE-627)300188773 (DE-600)1481962-4 (DE-576)104402504 0360-1323 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.00 Bauwesen: Allgemeines AR 226
allfieldsSound	10.1016/j.buildenv.2022.109763 doi (DE-627)ELV008793859 (ELSEVIER)S0360-1323(22)00993-3 DE-627 ger DE-627 rda eng 690 DE-600 56.00 bkl Fellini, Sofia verfasserin (orcid)0000-0003-3010-4348 aut High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation 2022 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees. Urban vegetation Street canyon ventilation Air pollution Street trees Marro, Massimo verfasserin aut Del Ponte, Annika Vittoria verfasserin aut Barulli, Marilina verfasserin aut Soulhac, Lionel verfasserin aut Ridolfi, Luca verfasserin aut Salizzoni, Pietro verfasserin aut Enthalten in Building and environment New York, NY [u.a.] : Elsevier, 1976 226 Online-Ressource (DE-627)300188773 (DE-600)1481962-4 (DE-576)104402504 0360-1323 nnns volume:226 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 56.00 Bauwesen: Allgemeines AR 226
language	English
source	Enthalten in Building and environment 226 volume:226
sourceStr	Enthalten in Building and environment 226 volume:226
format_phy_str_mv	Article
bklname	Bauwesen: Allgemeines
institution	findex.gbv.de
topic_facet	Urban vegetation Street canyon ventilation Air pollution Street trees
dewey-raw	690
isfreeaccess_bool	false
container_title	Building and environment
authorswithroles_txt_mv	Fellini, Sofia @@aut@@ Marro, Massimo @@aut@@ Del Ponte, Annika Vittoria @@aut@@ Barulli, Marilina @@aut@@ Soulhac, Lionel @@aut@@ Ridolfi, Luca @@aut@@ Salizzoni, Pietro @@aut@@
publishDateDaySort_date	2022-01-01T00:00:00Z
hierarchy_top_id	300188773
dewey-sort	3690
id	ELV008793859
language_de	englisch
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author	Fellini, Sofia
spellingShingle	Fellini, Sofia ddc 690 bkl 56.00 misc Urban vegetation misc Street canyon ventilation misc Air pollution misc Street trees High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
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topic_title	690 DE-600 56.00 bkl High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation Urban vegetation Street canyon ventilation Air pollution Street trees
topic	ddc 690 bkl 56.00 misc Urban vegetation misc Street canyon ventilation misc Air pollution misc Street trees
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title	High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
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title_full	High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
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title_sort	high resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
title_auth	High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
abstract	Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees.
abstractGer	Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees.
abstract_unstemmed	Greening cities is a key solution to improve the urban microclimate and mitigate the impact of climate change. However, the effect of tree planting on pollutant dispersion in streets is still a debated topic. To shed light on this issue, we present a wind-tunnel experiment aimed at investigating the effect of trees on street canyon ventilation. An idealized urban district was simulated by an array of blocks, and two rows of model trees were arranged at the sides of a street canyon oriented perpendicularly with respect to the wind direction. Reduced scale trees were chosen to mimic a realistic shape and aerodynamic behaviour. Three different spacings between the trees were considered. A passive scalar was injected from a line source placed at ground level and concentration measurements were performed in the whole canyon. Results show that the presence of trees alters the concentration pattern in the street with a progressive shift from a nearly two-dimensional to a three-dimensional field depending on tree density. Despite the significant change of the concentration field induced by trees, the average level of pollution in the street, and thus the overall ventilation efficiency, does not show a specific trend with the density of trees.
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title_short	High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation
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author2	Marro, Massimo Del Ponte, Annika Vittoria Barulli, Marilina Soulhac, Lionel Ridolfi, Luca Salizzoni, Pietro
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doi_str	10.1016/j.buildenv.2022.109763
up_date	2024-07-06T20:55:28.243Z
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High resolution wind-tunnel investigation about the effect of street trees on pollutant concentration and street canyon ventilation

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