Visualisation of dependencies between city structure and thermal behaviour in Brno

0468596 - ÚVGZ 2017 RIV DE eng C - Conference Paper (international conference)
Novotný, Jan - Pivovarník, Marek - Khalsa, Siri Jodha Singh - Zemek, František
Visualisation of dependencies between city structure and thermal behaviour in Brno.
XXIII ISPRS Congress: Technical Commission VII. Vol. 2016. Göttingen: Copernicus Gesselschaft, 2016, s. 741-745. International Archives of the Photogrammetry Remote Sensing and Spatial Information Sciences, 41 (B1). ISSN 1682-1750.
[International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Congress, ISPRS 2016 /23./. Prague (CZ), 12.07.2016-19.07.2016]
R&D Projects: GA MŠMT(CZ) LO1415; GA MŠMT(CZ) LM2015061
Grant - others:UrbanAdapt(XE) EHP-CZ02-OV-1-036-2015
Program: CZ02 Biodiverzita a ekosystémové služby / Monitorování a integrované plánování a kontrola v životním prostředí/ Adaptace na změnu klimatu
Institutional support: RVO:67179843
Keywords : Airborne laser scanning * City structure * Hyperspectral thermal imagery * Thermal regime * Urban heat island * Visualization and spatial analysis of urban phenomena
Subject RIV: EH - Ecology, Behaviour

Good understanding of a city's thermal regime and its dependency on the structure of the city provides key knowledge serving as an input for long-term strategic decision-making by local governments. The urban heat island, and more specifically overheating of the streets and adjacent buildings during summer heat waves, has been pointed out as an important issue in the city of Brno, Czech Republic. A complex research effort using remote sensing techniques has started which will analyse the impact of city structure on the thermal behaviour, principally the role of vegetation in the thermal regulation of streets. Two airborne data sets were acquired: hyperspectral data using CASI, SASI and TASI sensors (ITRES, Canada) and lidar mapping using a Riegl 680i instrument (RIEGL, Austria). The thermal data were acquired on two occasions: 7 February 2015 (winter season) and 4 July 2015 (summer season). A laser scanning data-set was acquired on 22 September 2015 with a point cloud density of approximately 15 points/m2. Surface temperature was retrieved from the thermal hyperspectral data by applying a temperature-emissivity separation algorithm. The 3-D structure of the city was classified from the laser scanning data; we distinguished three main classes: bare land, buildings and vegetation. In the paper we present figures comparing thermal behaviour with other features collected along linear transects through the central part of the city.
Permanent Link: http://hdl.handle.net/11104/0266403