Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
INVESTIGATION OF THE IMPACTS OF BUILDING AND URBAN PARAMETERS ON URBAN HEAT ISLAND FORMATION IN ANKARA
Download
DİLARA ERKAYA - 29.07.2022 TEZ BASKI.pdf
Date
2022-7-4
Author
Başçıl Erkaya, Dilara
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
277
views
265
downloads
Cite This
As a result of the urbanization in the last few centuries, green and permeable surface areas have decreased, and surfaces covered with materials with high heat holding capacity have increased. An increase in the environmental temperature caused by excessive heat above the urban areas is called Urban Heat Island (UHI) effect. This study primarily aims to find a correlation between the microclimate change of Ankara and the change in the building and urban surface materials due to expansion of urban areas. Within the scope of the study, 16 urban blocks with different structural and environmental characteristics were selected within the borders of Ankara. The buildings in the selected blocks and the surrounding urban elements were photographed with both digital and thermal cameras, and the albedo values of the relevant surfaces were calculated. Later, microclimate simulations of three-dimensional modeled areas were made in ENVI-met software and maps showing surface temperature, potential air temperature, wind speed and reflected shortwave radiation values were produced. vi The data obtained from the simulation results were compared with the measurements made in the physical environment and it was observed that they showed consistency. According to the results, building and urban characteristics such as building heights, surface albedo values, window to wall ratio, urban layouts and environmental elements affect the microclimatic conditions. In two blocks with very similar structural features, the different urban layout of the buildings primarily changes the wind passage pattern and the wind speed. Building heights also change the wind passage pattern and the area of shadows on the ground, causing changes in sensible temperature. As the albedo value of a material increases, the surface temperature decreases, and the use of low albedo materials reduce the ambient temperature. On the other hand, materials with low albedo value and high surface temperature have higher radiation energy to their surroundings. In addition, the presence of vegetation and water bodies reduces the potential air temperature by evaporation and absorbing the SW radiation. This effect helps to reduce the air temperature and increase the thermal comfort level of the people.
Subject Keywords
Urban Heat Island
,
surface albedo
,
thermal imagery
,
ENVI-met
,
thermal comfort level
URI
https://hdl.handle.net/11511/99779
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
ANALYZING THERMAL COMFORT OF TRANSITIONAL SPACES THROUGH CLIMATE-RESPONSIVE DESIGN SOLUTIONS
Ulu, Ümmühan Nur; Gürsel Dino, İpek; Department of Architecture (2023-1-16)
Amount of green spaces in the cities has gradually decreased and left its place to rapid construction as a result of the rapid increase in population and urbanization, causing the temperature difference between the city and the rural area to increase, resulting in the formation of Urban Heat Island (UHI) in cities. The necessity to create comfortable areas in dense cities increases the intensity of energy usage, requiring multi-layered studies to mitigate the urban heat island effect by developing climate-r...
Simulation of eddy-driven phytoplankton production in the Black Sea
Oguz, T; Salihoğlu, Barış (2000-07-15)
A three dimensional, three-layer biological model is used to assess impact of eddy-dominated horizontal circulation on the spatial and temporal variations of plankton biomass in the Black Sea. Simulations are shown to exhibit patchy distributions of phytoplankton biomass as inferred from satellite images, and their intensities agree reasonably well with observations. Overall performance of the three layer model points to its potential capability as a practical alternative tool to more complex and computatio...
Investigation of Sea Surface Temperature (SST) Anomalies over Cyprus Area
Georgiou, Andreas; Akcit, Nuhcan (2016-04-08)
The temperature of the sea surface has been identified as an important parameter of the natural environment, governing processes that occur in the upper ocean. This paper focuses on the analysis of the Sea Surface Temperature (SST) anomalies at the greater area of Cyprus. For that, SST data derived from MODerate-resolution Imaging Spectroradiometer (MODIS) instrument on board both Aqua and Terra sun synchronous satellites were used. A four year period was chosen as a first approach to address and describe t...
Measurement of soot surface growth kinetics
Yozgatlıgil, Ahmet (Informa UK Limited, 2008-01-01)
Surface growth is one of the major steps in the soot formation processes where most of the total mass is formed. Freshly generated soot from an ethylene diffusion flame was sampled and mixed with ethylene in a flow tube at elevated temperatures and using nitrogen as the carrier gas. The changes in the size of the soot particles after hydrocarbon addition were measured using a differential mobility analyzer. These measurements showed a significant mass increase of soot particles as a result of the hydrocarbo...
Investigation of seeded vertical gradient freeze (VGF) growth of CdZnTe bulk crystals
Balbaşı, Özden Başar; Ünal, Mustafa; Genç, Ayşe Merve; ÇELİK, GÜLÇİN; Parlak, Mehmet; Turan, Raşit (2022-04-15)
© 2022 Elsevier B.V.Due to the requirement for superheating above the melting point in the homogenization process of CdZnTe material, complete seed melting remains as a significant problem for the seeded vertical gradient freeze (VGF) growth of CdZnTe. In addition, due to the typical low single crystal yields in VGF growth of CdZnTe, obtaining single crystal seed material with desired geometries could be considered as a challenge. In this study, single crystal CdZnTe seeds of cylindrical geometry with 10 mm...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
D. Başçıl Erkaya, “INVESTIGATION OF THE IMPACTS OF BUILDING AND URBAN PARAMETERS ON URBAN HEAT ISLAND FORMATION IN ANKARA,” M.S. - Master of Science, Middle East Technical University, 2022.