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首页> 外文期刊>Water Science and Technology >Heat island mitigation using water retentive pavement sprinkled with reclaimed wastewater
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Heat island mitigation using water retentive pavement sprinkled with reclaimed wastewater

机译：使用洒有再生废水的保水路面缓解热岛

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摘要

In Japan, reclaimed wastewater has been recycled widely for non-potable urban applications and it is to be used for sprinkling roads to mitigate heat island in urban areas. To assess the heat island mitigation effects of the sprinkling reclaimed wastewater on water retentive pavement, we carried out a survey at Shiodome-District, Tokyo. The temperatures of air and roads, humidity, and WBGT (Wet-bulb globe temperature) were measured and heat flux was estimated to compare the condition of the areas with/without sprinkling. The following results were obtained. 1) Sprinkling reclaimed wastewater decreased the road surface temperature by 8 degrees during the daytime and by 3 degrees at night: temperatures equal to those on planting zones. Nevertheless sprinkling was done only in the daytime, the temperature decrease effect was not only obtained during the daytime: it continued through the night, due to the water retentive pavement. 2) Sprinkling reclaimed wastewater reduced the amount of sensible heat flux and increased that of latent heat flux. These results suggest that sprinkling reclaimed wastewater on water retentive pavement can effectively mitigate the heat island phenomenon.
机译：在日本，再生废水已广泛用于非饮用水城市应用，并将其用于洒水以减轻城市中的热岛效应。为了评估洒水再生废水对保水路面的热岛缓解效果，我们在东京汐留区进行了一项调查。测量了空气和道路的温度，湿度和WBGT（湿球温度），并估算了热通量，以比较有无洒水区域的状况。获得了以下结果。 1）喷洒再生废水使白天的路面温度降低了8度，而夜间则降低了3度：与种植区的温度相同。尽管如此，喷水只在白天进行，降温效果不仅在白天获得：由于保水路面，它一直持续到夜晚。 2）喷洒再生废水减少了显热通量，增加了潜热通量。这些结果表明，将再生废水撒在保水路面上可以有效减轻热岛现象。

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