抄録
Based on our preliminary survey, which began 13 days after the landfall of Typhoon Lan, this paper assesses the situation along the coastline of Kanagawa, Chiba, and Tokyo, with a particular emphasis on the damage to coastal and port structures. It also discusses the research necessary to mitigate the future coastal flooding risk in and around Tokyo Bay. Storm-surge height, wave run-up height, coastal erosion, and infrastructure damage in various places are given. Extensive scouring was observed at a yacht harbor on Enoshima Island and at Kanaya port, where the elevation of the dykes was 7.3 m and 5 m from Tokyo Peil (TP), respectively. Waves overtopped and destroyed a long stretch of the breakwater parapet inAkiya Fishery Port and Kanaya Port. The highest elevation of wave run-up was 6.7 m from TP, recorded at a restaurant on a coastal hill in Tateyama. The maximum storm-surge heights at the tidal stations of Kanagawa, Tokyo, and Chiba Prefecture was 2.47 m (Banyu river bridge station), 1.28 m (Horie), and 1.21 m (Mera), respectively. Analysis based on best track data shows that Lan was one of the strongest, largest, and fastest typhoons ever to make landfall in Kanto.
