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THERMAL MAPPING IN FLAT LOWLANDS AND UNDULATING UPLANDS - A COMPARISON OF RESULTS

Journal article
Authors L. Sidlauskaite
Jörgen Bogren
Published in Baltic Journal of Road and Bridge Engineering
Volume 14
Issue 3
Pages 326-340
ISSN 1822-427X
Publication year 2019
Published at Department of Earth Sciences
Pages 326-340
Language en
Links dx.doi.org/10.7250/bjrbe.2019-14.44...
Keywords mapping technique, road climatology, road surface temperature, road weather station, road weather, thermal mapping, road surface-temperature, geographical parameter database, air, Engineering
Subject categories Earth and Related Environmental Sciences

Abstract

Thermal mapping has been known as a reliable technique to analyse and even predict road surface temperature in a stretch of road, rather than just a single point (e.g. road weather station location). The method itself was developed in the 1980s, and as time progressed, the technique was improved and has become more applicable. Due to other methods, such as climate modelling, becoming widely accessible and more affordable to apply, thermal mapping started being pushed out to the background as an expensive alternative. The idea for this paper arose from thermal mapping applications to Lithuanian roads that produced inconclusive results in some research areas and raised the question of whether this technique applies to flatlands as effectively as to uplands. The Czech Republic was chosen as a country with an available database and environmentally different road network. Several stretches of road thermal mapping data were analysed and compared. It was concluded, that in flat landscapes altitude has lesser predictability value for road surface temperature than in undulating uplands. In addition, thermal mapping results appear to be more inconclusive in flatlands, compared to uplands. Nevertheless, thermal mapping is a good and reliable method for determining cold spots.

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