Development of Flood Routing Model in the Navigation Waterway to Support Operations of Weir and Flood Gate

• DOI: 10.3741/jkwra.2012.45.9.959
• Publication Date: 2012-11-02T02:43:57Z
• Authors: Joon-Woo Noh; Myung-Ki Park; Myung-Geun Shim; Sang-Jin Lee
• Keywords: 0207 environmental engineering; 02 engineering and technology

HEC-RAS has been applied to simulate water level variation in the Ara waterway during the flood season. To support decision making necessary for operation of the hydraulic structures especially during the flood season, it is important to consider various factors such as water level of the Han River, Gulpo River, and tidal level of the west sea in conjunction with operation of the hydraulic structures such as the Gyulhyun Weir, the West sea gate, and pumping stations. Especially for operation of the west sea gate, the Rule-script option was employed to determine the opening height considering the variation of the water level in the waterway and the west sea simultaneously. For model verification, comparison of water level computed at the upstream and downstream of the regulation weir shows a good agreement with observed data measured during the flood event in September 2010. The HEC-RAS model developed in this study will contribute to support operation of the waterway during the flood season.