福岡平野における弥生時代の集落立地
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The so called location of settlements in Yayoi Age in the Fukuoka Plain, commonly known as well developed region in Yayoi Age, depended on the cultivation of rice plants. In this article, I examined their location by considerations of geographical conditions and by classifications of it into 7 types as follows:A: On a upland-A-a: facing shallow valley A-b: facing valley bottom land A-c: the restB: On a lower terrace-B-a: near a flood plain B-b: the restC: On a flood plain-C-a: micro relief such as natural levee C-b: the restAs a result of the examinations, I reached the conclusions as follows:1) Some settlements of the latest period of Jomon(_??__??_)Age continued to Yayoi Age, while some did not. Their continuation depended upon whether or not they had shallow valleys where the soil was suited to the cultivation of paddy rice plants.2) The A-a type and C-a type settlements prevailed in the early period of Yayoi Age and continued their existence for a long time. Both types had the shallow valleys or flood plains where the soil was suited to the rice plants cultivation. Some of C-a type settlenents ceased to exist. Considerating their relatively lower height in altitude, it could be assumed that they were destroyed by inundations of rivers.3) The location of settlements in the middle period of Yayoi Age was of various types, due to the technical progress of the rice cultivation. Half of them were of A-a type. The fact showed that it was easy for Yayoi people to develop the shallow valleys. Therefore they developed them first and proceeded the settlements.4) Among the newly located settlements in the middle period of Yayoi Age, the A-a type settlements existed for a long time and the A-c type and the C-a type settlements existed for a short time.5) 65% of the location types of settlements in the later period of Yayoi Age were A-a type, the other types existed by just a few. The location types were still varied.6) Through out Yayoi Age, the duration of the A-a type settlements were long, while that of the B-a type and the B-b type settlements were short. That of the C-a type settlements lay between them.7) The long duration of the A-a type settlements was due to the fact that they suffered no flood damages situated on high elevations.
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