Abstract
Permeable pavement is an effective low impact development (LID) practice that can play an important role in reducing rainfall runoff amount in urban areas. Permeable interlocking concrete pavement (PICP) was retrofitted in a tremendously developed area of Seoul, Korea and the data was monitored to evaluate its effect on the hydrology and stormwater quality performance for four months. Rainfall runoff was first absorbed by different layers of the PICP system and then contributed to the sewage system. This not only helps to reduce the runoff volume, but also increase the time of concentration. In this experiment, different real rain events were observed and the field results were investigated to check the effectiveness of the PICP system for controlling the rainfall runoff in Songpa, Korea. From the analysis of data, results showed that the PCIP system was very effective in controlling rainfall runoff. Overall runoff reduction performance from the PCIP was found to be around 30–65% during various storm events. In addition, PICP significantly reduced peak flows in different storm events which is very helpful in reducing the chances of water-logging in an urbanized area. Research results also allow us to sum up that retrofitted PICP is a very effective approach for rainfall runoff management in urban areas.
Highlights
Climate change and urbanization are two dominant factors that are altering the natural hydrological cycle as well as boosting the flash flooding in cities [1,2]
Different runoff volume reduction calculated on the basis of storm events and the analysis shows that the permeable interlocking concrete pavement (PICP) system would have reduced 30–65% of the volume, which shows that it is a very effective technique to control flash flood issues in developed areas like Songpa, Seoul, Korea
The results have demonstrated that the retrofitted PICP system is very effective in handling the storm events to decrease chances of flash floods in the developed area of Seoul
Summary
Climate change and urbanization are two dominant factors that are altering the natural hydrological cycle as well as boosting the flash flooding in cities [1,2]. Urbanization has replaced the natural surface with hard infrastructure such as roads, buildings and parking lots, which have decreased the natural infiltration rate of the soil [3,4,5] These adverse impacts of urbanization have created multiple problems, such as flash flooding, stream bank erosion and water quality degradation [4,5]. Under these circumstances, our traditional storm water management approaches need to be redesigned to perform well under the extreme climate conditions [6]. To mitigate these adverse impacts of urbanization, there is an urgent need for development of new sustainable urban water management approaches around the globe
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