Evaluation Research of Urban Environment Infiltration Effectiveness of Permeable Pavement

• Main Authors: Yen-Shu Chen, 陳妍束
• Other Authors: 鄭光炎
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/63488x

碩士 === 國立臺北科技大學 === 土木與防災研究所 === 96 === Due to the higher density of development in the urban, impermeable pavements is being used increasingly, runoff and flood frequency are relatively increased and reduce water absorption and permeation capability, even it results the urban temperature higher than suburban. Another impact is a reduction of infiltration which lessens groundwater recharge and potentially lowers stream base flows. Runoff from impervious areas may also increase pollutant loads to streams. Thus, the use of impermeable pavements is one of the many reasons that have caused increasingly serious flood and urban heat island in Taiwan in recent years. One of these effective methods in these problems is to be laid extensively permeable pavement. On one hand this study examined the long-term effectiveness of permeable pavement as an alternative to traditional impervious pavement in a sidewalk. Virtually when rainfall less than 35mm/hr,all rainwater infiltrated through the permeable pavements, with almost no surface runoff, the benefit of the infiltration can reach more than 90%. The ability of the dropping in the ground temperature of the permeable pavement can reach 5~8℃ and the effect of the dropping in ground temperature can continue one day after the rainy day. On the other hand is study through indoor laboratory experimentation, and assess the different paving method and different permeable proportion with 3 hours of artificial rainfall to know the permeable pavement to restrain the runoff of the rainfall and the effects of the percolated into the groundwater. The permeable paving method of simulation is more scattered results the surface runoff will occur 8 minutes time step early when increasing per 20% impermeable pavements. The other permeable paving method of simulation is more concentrated results the surface runoff will occur 5~8 minutes time step later when increasing per 20% permeable pavements.