新田成立の自然的基礎 : 周防灘北岸の場合

概要

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Of the coastal alluvial low land distributed over the northern coast of the Suonada, more than half is the artificially constructed region reclaimed by drainage, while rest is constructed by natural accumulation. The former area was constructed within a remarkably short period of about a thirty-seven of the alluvial ,epoch. The writer, while carrying on his researches into the processes of the coastal dune formation, could discover the fact that a sea-level descent, which took place from about the end of the 16th century, gave rise to vast spacious tidelands and wind-heaped dunes, whereas the inquiries into the vertically transitive phenomena of the dwelling belt in the Medieval Age showed that its level in the alluvial epoch, which is the highest, presents a tendency of gradual descent during the Modern Age, making a striking contrast wit~ the change in the alluvial topography along the coast. It has come to. be assumed that the growth the extensive tideland in the Modern Age namely "Shinden", was caused not merely by the political, social, economic situation in those days, by the natural situation accompanied by the occurrence of spacious dry beaches in the background. Those two situations mutually interacting resulted in the formation of the vast artificail area within such a short space of time.
地理科学学会の論文
1962-10-20