山形市馬見ヶ崎川扇状地扇端部の井戸遺構と地下水位復元

概要

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Keywords : Fan, Ground water, Archeological excavation, Well, Yamagata　キーワード：扇状地, 地下水, 考古学的発掘, 井戸, 山形　Summary : More than 200 wells were excavated in the archaeological survey area of about 60,000m~2 in the Futaba-cho Site, Yamagata city. The geo-morphological position of the Futaba-cho archeological site is on the fringe of the Mamigasaki-gawa fan. The depth of the wells do not exceed a few meters and they may almost be called springs. Ages of the wells are from the 9th century to the Modern and the most of them are formed during 17th to 18th century, the earlier half of the EDO era. The excavation area was in the inside of the first of the threehold outer walls of Yamagata castle. There were 12 cases where the new well was superposed directly on the older one and there was a case where 15 wells during different ages were made within the area of 75 x 40 meters. It is often the case that the new wells are deeper than the older ones. It is assumed that the level of ground water rapidly fell during the earlier half of 17th century, possibly because the deep ditches surrounding the castle wall were constructed or the river course of the Mamigasaki river was changed to prevent the floods in the down town area.
山形大学の論文
2004-03-20