EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Efficiency of Urban Drainage Networks: A Case Study in Seoul

Junshik Hwang, Yongwon Seo, and Hyun Il Choi
Junshik Hwang et al.
  • Yeungnam University, Department of Civil Engineering, Korea, Republic of(

The efficiency of urban drainage networks are very important within the framework of flood mitigation planning. This study suggests a methodology to evaluate the efficiency of urban drainage networks. Gibbs’s model was applied to 237 catchments in Seoul. If the parameter β is less than 100, it is regards as an inefficient network. Otherwise, it is an efficient network. The results show number of catchments with lower β is greater than with higher β. This is contradictory to common sense that urban drainage networks are efficient. Identifying the efficiency of an urban drainage networks suggest potential flood reduction by an alternative method, which is related to a layout of the networks.

How to cite: Hwang, J., Seo, Y., and Choi, H. I.: Efficiency of Urban Drainage Networks: A Case Study in Seoul, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-21263,, 2020