Author(s): Ariestides K. T. Dundu; Koichiro Ohgushi
Linked Author(s): Koichiro Ohgushi
Keywords: Storm surge; Saga Plain; Water level; Current speed; Flow flux
Abstract: Saga is one of the prefectures in Kyushu Island, Japan, which includes a 328 km2 lowland faced on the Ariake Sea. This area is functioning as a cultivation area of the agricultural products, residential, offices, airports and other public facilities currently. Due to flat lowland, it has a large risk to be quick inundation to the plain when the sea water comes into inland. This paper presents the analysis on the impact of storm surge by typhoon in the Saga lowland using a numerical simulation model MIKE3 FM. This simulation uses 15 scenarios which are categorized into 5 major groups based on the wind speed and the variations of the wind direction. Some scenarios in these numerical simulations describe the condition of water surface elevation, current speed and flow flux in the Ariake Sea and Saga Plain. The aim of this study is to analyze the impact of storm surge by the typhoon Songda (T0418) that ever crossed the region in Saga Plain and the surroundings and to know the conditions that can make the water level exceed the height of coastal dyke which causes the inundation in the Saga Plain.
Year: 2012