2022 Volume 21 Issue 2 Pages 230-234
As an initial step in exploring how coastal spaces should be like for living with water in an era of climate change, the cross-sectional shape of the coast in five wards of Osaka City facing Osaka Bay was examined. The survey revealed the following characteristics of the coast. (1) Approximately 60% of the coast is occupied by specific uses, making it difficult to assume public access. (2) Of the 40% of the coast where public access could be assumed, about 80% had a vertical surface at the water's edge, about 80% had a free-standing wall or trapezoidal embankment, and about 90% had the same height or lower inside the embankment than the base of the embankment, outside the embankment, or the top of the sloping surface. (3) Although there are 21 combinations of the cross-sectional shapes of the water's edge, embankment, and inside of the embankment, about 50% of the combinations have a vertical waterline, an independent embankment, and the inside of the embankment at the same height or lower. (4) Elements that are assumed to reduce visibility and accessibility from inside to outside of the embankment occupy a considerable portion of the coast. (5) Although the percentage is low, the water's edge other than vertical surfaces is expected to increase the accessibility to water, and flat and sloping surfaces without embankments and the higher insides are assumed to increase the visibility and accessibility from inside the embankments to the outside. From now, it is necessary to research on visibility and accessibility from inside to outside of the embankment, how the cross-sectional shape was formed, its applicability in the restructuring of the coast, and the spatial forms related to water-friendly uses.
