Title: Accounting for the role of trees in urban energy balance modeling using GIS techniques
Other Titles: Accounting for the Role of Trees in Urban Energy Balance Modeling Using GIS Techniques
Language: English
Authors: Hammerberg, Kristopher Fritz 
Qualification level: Diploma
Advisor: Mahdavi, Ardeshir 
Issue Date: 2014
Number of Pages: 62
Qualification level: Diploma
This thesis work addresses the effect of trees on the urban energy balance and examines two methods for accounting for their impact in micro-climate modeling. The primary objective was to explore the ways that trees influence the exchange of radiation within the urban environment, namely the obstruction of the sky to nocturnal longwave radiative cooling and the interception of direct short-wave solar radiation. In pursuit of this goal, this study employed computational methods involving high resolution digital models of the city of Vienna, Austria. They were used to calculate continuous sky view factor (SVF) maps and estimate global solar radiation in urban street canyons. Both methods were compared to on-site measurements for validation. Additionally, the strength of the relationship between SVF and urban heat island intensity (UHII) was also explored. In order to achieve this, 5 urban study areas and one rural reference area were selected. Each study area was centered around a longterm weather station. In each area it was necessary to distill a single area mean value of SVF from the continuous SVF maps to compare against the UHII value. Several methods for area mean sampling were compared in view of the strength of their relationship to UHII.
URI: https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-71093
Library ID: AC11348273
Organisation: E259 - Institut für Architekturwissenschaften 
Publication Type: Thesis
Appears in Collections:Thesis

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