Article 2023 · 17 citations

Analyzing the effect of view factors on surface heat flux, surface temperature, and vegetation cover

Yildiz, Nalan Demircioglu, Erdem, Firat, Acet, Seyma Berk, Avdan, Ugur

Abstract

With the increase in population in cities, economic, social, and environmental problems continue to increase, and it is thought that the microclimatic conditions created by these problems will cause more environmental problems. One of the factors affecting the urban climate in urban areas is urban geometry. The climate of a region changes due to the shape of the land surface, human activities, atmospheric movements, and latent and sensible heat fluxes. Sky view factor (SVF), building view factor (BVF), and tree view factor (TVF) are actively used in the determination of urban geometry. However, studies on how these factors affect the thermal state of the urban environment are insufficient. Determining the land surface changes and thermal condition characteristics (LST, NDVI, SHF, and LHF) depending on urban growth and examining how these properties affect thermal conditions are very important in the construction of sustainable urban planning. In the study, SVF, BVF, TVF, LST, NDVI, SHF, and LHF values of 55 points determined for three different areas with different urban geometries were calculated. How these values affect each other and their situation on urban outdoor thermal comfort is evaluated. In the study, statistical analysis was performed to evaluate the relationship between surface temperature, surface heat fluxes, different view factors, and vegetation. As a result of ANOVA analysis, it was determined as very significant (p > 0.01) in all regions. Both SHF and LHF values differ with SVF. The SHF value has a direct relationship with the SVF value. LHF is inversely proportional to the SVF value. The situation is reversed for SHF variation concerning vegetation. LHF and NDVI are directly related. SHF and NDVI are inversely proportional. SVF and NDVI values also vary according to the LST value. It has been observed that LST has a direct relationship with SVF and an inverse relationship with NDVI.

Keywords

Urban Surface heat flux (SHF) Sky view factor (SVF) Land surface temperature (LST) NDVI OUTDOOR THERMAL COMFORT MEAN RADIANT TEMPERATURE AIR-TEMPERATURE LAND-SURFACE ENERGY-BALANCE ISLAND INTENSITY STREET GEOMETRY CANYON GEOMETRY URBAN GEOMETRY SKY

WoS Categories

Environmental Sciences

Sustainable Development Goals

Climate Action Sustainable Cities and Communities

Citation

Journal: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Year: 2023
Volume: 30
Issue: 15
Pages: 43843-43859
ISSN: 0944-1344
eISSN: 1614-7499
DOI: 10.1007/s11356-023-25261-9
WoS UID: WOS:000922723700015

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