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首页> 外文期刊>Engenharia Sanitaria e Ambiental >Influence of rainfall intensity on the production of runoff on ceramic tile roofs: laboratory experiments under simulated rainfall
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Influence of rainfall intensity on the production of runoff on ceramic tile roofs: laboratory experiments under simulated rainfall

机译：降雨强度对瓷砖屋顶径流产生的影响：模拟降雨下的室内实验

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Rainwater harvesting consists on the collection of runoff from low permeable surfaces, as roofs and streets. Designing these systems is often based on pluviometer data and not on pluviograph data, therefore they do not consider crucial data on the amount of rainwater available to harvesting. Laboratory experiments were conducted by simulating low, moderate and high intensity rainfall on a ceramic tile roof. Results shown that rainfall intensities between 12.8 and 61.6 mm h -1 (moderate to high intensity) lead to runoff coefficients greater than 0.9, while for rainfall low intensities (lower than 1.2 mm h -1 ), the runoff coefficient drastically decreased, reaching values of zero for rainfall intensities lower than 0.25 mm h -1 . In conclusion, for the simulated experimental conditions, water absorption of the ceramic tiles is more significant on the runoff for very low rainfall intensities than the strong or moderate rainfall intensities.
机译：雨水收集包括从低渗透性表面（如屋顶和街道）收集径流。设计这些系统通常是基于测雨仪数据而不是基于测雨仪数据，因此，它们没有考虑可用于收集的雨水量的关键数据。通过模拟瓷砖屋顶上的低，中，高强度降雨进行了实验室实验。结果表明，降雨强度在12.8和61.6 mm h -1之间（中度至高强度）导致径流系数大于0.9，而降雨强度低（小于1.2 mm h -1）时径流系数急剧下降，达到降雨强度小于0.25mmh -1时为零。总之，对于模拟的实验条件，在降雨强度很低的情况下，瓷砖的吸水率比在强降雨或中等降雨强度下的径流更重要。

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