A Study on the Characteristics of Urban Storm Sewer Networks from a Network Perspective

Abstract

Most of the rainfall over impervious surfaces of urban areas flows along the surface of the ground, flows into the storm sewer network, and is discharged from the catchment. Therefore, the proper design of storm sewer networks and understanding of the characteristics of storm sewer networks should be considered first in reducing urban flooding. In this study, we selected watersheds with a general sewer network in urban areas. It was assumed that the sewer network was a storm sewer network with the characteristics of a complex network, such as a natural stream. The concepts applied in natural stream systems were applied to the target watersheds. The laws of stream numbers and stream lengths were calculated using Horton's law, which is applied to the stream pattern of natural streams. It was deemed necessary to study the application of a different theory in addition to the existing theory that was applied in this study in the future. If the criteria for the characteristics of rainwater pipes are also presented in the design of rainwater pipes in urban areas, then more effective water duct design and urban flood reduction will be possible. Keywords: Storm Swere Networks, Horton’s Law, Law of Stream Numbers, Law of Stream Lengths