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Article

A Study on Urban Inundation Using SWMM in Busan, Korea, Using Existing Dams and Artificial Underground Waterways

1
Institute of Industrial Technology, Pusan National University, Busan 46241, Korea
2
Department of Civil and Environmental Engineering, Pusan National University, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Enrico Creaco and Marco Franchini
Water 2021, 13(12), 1708; https://doi.org/10.3390/w13121708
Received: 29 March 2021 / Revised: 18 May 2021 / Accepted: 15 June 2021 / Published: 20 June 2021
The annual average rainfall in Busan area is increasing, causing frequent flooding of Busan’s Suyeong and Oncheon rivers. Due to the increase in urbanized areas and climate change, it is difficult to reduce flood damage. Therefore, new methods are needed to reduce urban inundation. This study models the effects of three flood reduction methods involving Oncheon River, Suyeong River, and the Hoedong Dam, which is situated on the Suyeong. Using EPA-SWMM, a virtual model of the dam and the rivers was created, then modified with changes to the dam’s height, the installation of a floodgate on the dam, and the creation of an underground waterway to carry excess flow from the Oncheon to the Hoedong Dam. The results of this study show that increasing the height of the dam by 3 m, 4 m, or 6 m led to a 27%, 37%, and 48% reduction in flooding, respectively, on the Suyeong River. It was also found that installing a floodgate of 10 × 4 m, 15 × 4 m, or 20 × 4 min the dam would result in a flood reduction of 2.7% and 2.9%, respectively. Furthermore, the construction of the underground waterway could lead to an expected 25% flood reduction in the Oncheon River. Measures such as these offer the potential to protect the lives and property of citizens in densely populated urban areas and develop sustainable cities and communities. Therefore, the modifications to the dam and the underground waterway proposed in this study are considered to be useful. View Full-Text
Keywords: SWMM; urban flood reduction; underground waterway SWMM; urban flood reduction; underground waterway
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MDPI and ACS Style

Choo, Y.-M.; Sim, S.-B.; Choe, Y.-W. A Study on Urban Inundation Using SWMM in Busan, Korea, Using Existing Dams and Artificial Underground Waterways. Water 2021, 13, 1708. https://doi.org/10.3390/w13121708

AMA Style

Choo Y-M, Sim S-B, Choe Y-W. A Study on Urban Inundation Using SWMM in Busan, Korea, Using Existing Dams and Artificial Underground Waterways. Water. 2021; 13(12):1708. https://doi.org/10.3390/w13121708

Chicago/Turabian Style

Choo, Yeon-Moon, Sang-Bo Sim, and Yeon-Woong Choe. 2021. "A Study on Urban Inundation Using SWMM in Busan, Korea, Using Existing Dams and Artificial Underground Waterways" Water 13, no. 12: 1708. https://doi.org/10.3390/w13121708

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