Effectiveness of Tree Pattern in Street Canyons on Thermal Conditions and Human Comfort. Assessment of an Urban Renewal Project in Historical District in Lodz (Poland)
Open Access
- 10 June 2021
- journal article
- research article
- Published by MDPI AG in Atmosphere
- Vol. 12 (6), 751
- https://doi.org/10.3390/atmos12060751
Abstract
The implementation of adaptation strategies has become an essential activity of spatial planning departments. Passive technologies related to the introduction of natural components in the form of vegetation are used, especially in urban development plans, to mitigate the effects of climate change and thus improve the quality of citizen life. Nature-Based Solutions are of particular importance in the areas of strict city centers, where historical building structures are subject to legal protection. In this study, the authors tested the influence of high greenery on the microclimatic conditions in the areas of typical street canyons (east–west and north–south orientations). Authors included the established greenery strategy by the City Planning Department. To estimate the impact of the assumed scenarios, a CFD tool was used—the ENVI-met application, which is commonly used in the field of urban microclimatology. Studies have shown that the introduction of 10% of green area contributed to a maximum air temperature reduction of 0.80 °C (17:00) in an east–west-oriented canyon, 0.49 °C (10:00) in a north–south canyon. The scenarios, assumed by the City Planning Department, related to the introduction of a greater amount of greenery turned out to be a less effective solution. The impact of greenery on the thermal comfort felt by humans was also determined. The reduction in the PET index was a maximum of 10.80 °C (14:00) in an east–west canyon; 6.66 °C (14:00) in a canyon area with a north–south orientation. This research might constitute the foundations to a re-evaluation of the urban development plans. The outcomes can lead to taking alternative direction of city layout transformations.Keywords
This publication has 42 references indexed in Scilit:
- Effect Modification of the Association between Short-term Meteorological Factors and Mortality by Urban Heat Islands in Hong KongPLOS ONE, 2012
- A study on the cooling effects of greening in a high-density city: An experience from Hong KongJournal of Affective Disorders, 2012
- Seasonal variations in the cooling effect of urban green areas on surrounding urban areasUrban Forestry & Urban Greening, 2010
- Urban greening to cool towns and cities: A systematic review of the empirical evidenceLandscape and Urban Planning, 2010
- Morbidity is related to a green living environmentJournal of Epidemiology and Community Health, 2009
- Heat Stress and Public Health: A Critical ReviewAnnual Review of Public Health, 2008
- Urban shading—a design option for the tropics? A study in Colombo, Sri LankaInternational Journal of Climatology, 2007
- Shading simulation of the courtyard form in different climatic regionsJournal of Affective Disorders, 2006
- Numerical study on the effects of aspect ratio and orientation of an urban street canyon on outdoor thermal comfort in hot and dry climateJournal of Affective Disorders, 2006
- Temporal and spatial characteristics of the urban heat island of Łódź, PolandAtmospheric Environment, 1999