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Inundation simulation in a urban drainage basin considering tidal stage effect  

Kim, Dae Geun (목포대학교 공과대학 건설공학부 토목공학전공)
Choi, Kyung Soon (목포대학교 공과대학 건설공학부 토목공학전공)
Koh, Young Chan (초당대학교 건설정보공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.23, no.6, 2009 , pp. 711-717 More about this Journal
Abstract
In this study, SWMM model is used to reproduce the main storm sewer system located in the Nae-Hang drainage basin of the Mokpo city and keep track of flood discharge. Given the outlet of the reaches border the coastline, this paper has taken the dual-drainage approach to perform inundation simulation, considering both the overflows and inflows at the manholes of the sewer system, and at the same time, taking the impacts of tidal stage into consideration. The following conclusions are reached in this study: First, when planning lowland sewer system alongside the coastline or the riverside, the tidal stage or flood stage need to be considered in the planning and design processes. Second, an analysis that fails to consider overflow and inundation at the manholes may overestimate inundation depth of the flooded area. In other words, in order to estimate flood discharge and flood stage in a lowland storm sewer system, it is desirable to analyze the conveyance capacity of storm sewer system and simulate overflow and inundation at the manholes at the same time.
Keywords
SWMM model; sewer system; tidal stage; dual-drainage; inundation; overflow;
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