DATA CONCURRENCY FOR URBAN HEAT ISLAND (UHI) MONITORING IN HANOI, VIETNAM

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Year:
2016
Type of Publication:
In Proceedings
Keywords:
Urban heat island , UHI intensity , urban and rural boundary
Authors:
Pham, Minh Thang; Huang, Guwangwei
Abstract:
The Urban heat island (UHI) phenomenon is known as having impacts on environment, energy consumption and human life. In most of previous studies, the UHI intensity is estimated based on the outdated map to separate the urban and the surrounding areas, which can lead to the bias in UHI intensity, especially in rapid urbanization regions. In this study, we focus on using remote sensing data for assessment of UHI effect in Hanoi city from 1989 to 2013. Here, to estimate the UHI intensity, two approaches are employed to define the urban – rural boundary: the first approach is based on the changes of administrative boundary; and the second approach traces the real expansion of urban boundary generated from land use maps in the same years. The result demonstrates the changes of UHI phenomena in Hanoi city in the period. It also suggests that for monitoring UHI, the UHI intensity estimation should be based on the real change of the urban area; since the method which is based on the administrative boundary, fails to capture the real magnitude of UHI.
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