Investigating the Influence of Various Stormwater Runoff Control Facilities on Runoff Control Efficiency in a Small Catchment Area

Rei Itsukushima, Yohei Ogahara, Yuki Iwanaga and Tatsuro Sato
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Rei Itsukushima: Department of Decision Science for Sustainable Society, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
Yohei Ogahara: Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
Yuki Iwanaga: Japan Railway Construction, Transport and Technology Agency, 1-13-26 Nishiki, Naka-ku, Nagoya city, Aichi prefecture 460-0003, Japan
Tatsuro Sato: Department of Decision Science for Sustainable Society, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Sustainability, 2018, vol. 10, issue 2, 1-12

Abstract: Urbanization causes an increase in the flood discharge because of the infiltration capacity. Furthermore, extreme precipitation events have been an increasing concern for many regions worldwide. This study aimed to investigate the influence of different outflow control facilities on runoff reduction in a small watershed. We focused on the soil-improvement technology and rainwater tanks as outflow control facilities and conducted a runoff calculation using a rainfall event of a magnitude that is likely to occur once in a hundred years. The calculation showed that the soil-improvement technology reduced runoff during long-term continuous rainfall, whereas in a concentrated short-term rainfall event, a significant difference in the runoff reduction effect between rainfall tanks of various volumes was observed. Since effective countermeasures for runoff reduction differ depending on the rainfall distribution pattern, we suggested both facilities for storing initial rainfall and initiating countermeasures for penetration improvement over the long term.

Keywords: urbanization; runoff reduction; soil improvement; rainwater tank; runoff simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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