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Titel |
How cool is Uchimizu? |
VerfasserIn |
Anna Solcerova, Tim van Emmerik, Koen Hilgersom, Frans van de Ven, Nick van de Giesen |
Konferenz |
EGU General Assembly 2017
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Medientyp |
Artikel
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Sprache |
en
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Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 19 (2017) |
Datensatznummer |
250141487
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Publikation (Nr.) |
EGU/EGU2017-5006.pdf |
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Zusammenfassung |
The Urban Heat Island (UHI) was first described 200 years ago, but ways to mitigate heat in
urban areas reach much further into the past. Uchimizu is a 17th century Japanese tradition, in
which water is sprinkled around houses, temples, and in gardens to cool the ground surface
and the air, and to settle the dust. Nowadays, megacities such as Tokyo are aiming to revive
the - by modern technology suppressed - method, and uchimizu is promoted by local
authorities as a "clever way to feel cool". Unfortunately, the number of published studies that
have quantified the cooling effects of uchimizu is limited, and only uses measurements of the
surface temperature, or air temperature at a single height, as a measure of the cooling
effect. In this research a dense 3D Distributed Temperature Sensing (DTS) setup was
used to measure air temperature within once cubic meter of air above an urban
surface with high spatial and temporal resolution. Six experiments were performed
to systematically study the effect of (1) applied water amount, (2) initial surface
temperature, and (3) shading on the cooling effect of uchimizu. We present the results and
the subsequent analyses of these experiments, done during summer in Delft, The
Netherlands. We show that this simple water sprinkling method has the potential
to decrease extreme temperatures in impervious and paved parts of urban areas
considerably. Besides mitigating the UHI, uchimizu practice is also an opportunity to
increase awareness among citizens, and stimulate citizen participation in solving heat
stress problems and energy saving. By providing refreshing insights on the cooling
effect of uchimizu, we aim to contribute to the modern revival of this old tradition. |
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