Assessment of spatial/temporal variability of urban heat island effect : a case study in the central districts of İzmir
Başlık:
Assessment of spatial/temporal variability of urban heat island effect : a case study in the central districts of İzmir
Yazar:
Ay, Filiz, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xii, 126 leaves: illustrarions, charts; 29 cm + 1 computer laser optical disc.
Özet:
The rapid increase in urban population leads to changes in land use/land cover (LULC) and environmental problems such as Urban Heat Islands. Temperatures in cities being higher than their rural surroundings is a climatic phenomenon known as Urban Heat Island (UHI). Besides direct measurements of air temperature, Land Surface Temperature (LST) that characterizes Surface Urban Heat Island (SUHI) is widely used to determine the impact of UHI. This study aims to determine the spatial/temporal variability of the SUHI effect in the central districts of İzmir for the years 1990, 2000, 2006, 2012, and 2018. Landsat satellite images were used for LST, Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Normalized Difference Building Index (NDBI), Urban Index (UI), and albedo, while the CORINE land cover dataset was used for LULC maps. In the study, the relationship between LST and LULC, and spectral indices was analyzed using zonal statistics, correlation, and regression analyses. In 2018, the highest LST values were observed for pastures, industry, commercial areas, transportation units, and mines, respectively. There is a high positive correlation between LST and NDBI, UI, Albedo, and a negative correlation with NDVI, respectively, while there is a moderate positive correlation with NDWI. In the regression model, 60.4% of the variability of the dependent variable is explained by NDBI and NDVI. NDBI (71.3%) and NDVI (7.6%) indices were the most effective factors on SUHI formation. The SUHI effect was more comprehensively evaluated across five different regions adding built-up indices into the variable set. It is concluded that the changes in LST values, together with the built environment indices, are largely influenced by changes in LULC.
Yazar Ek Girişi:
Tüzel Kişi Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)-- İzmir Institute of Technology: City and Regional Planning
İzmir Institute of Technology: City and Regional Planning (Master).
Elektronik Erişim:
Access to Electronic Versiyon.