Research into Relationships between Geomorphic Development of Barriers and Human Activity in the Coastal Lowlands during the Holocene.

本研究的第一个目的是阐明全新世日本海岸屏障的地貌发展。研究了七个地区（Ukishimagahara, Shimizu, Matsuzaki， hai原，Tokoro，相上河低地和滨湖），因为所有这些地区都代表了日本典型的沿海屏障。结果总结如下：1。在每个地区都证实了原始屏障的存在（在冰期后海侵期间发育）。海岸堰洲地貌发展的区域差异是通过海湾口堰洲或溺水谷堰洲围合的时间滞后来认识的。在海侵高潮后的退退过程中，次级屏障发育了5000 ~ 4000年和3000 ~ 2000年两个阶段。研究的第二个目的是探讨屏障发育对沿海低地人类活动的影响。研究的地区是骏河湾沿岸的Ukishimagahara、Kano河和清水低地。结果总结如下：1。英国意象原低地的人类活动受到屏障发展的影响。在卡诺河低地的河口地区，海岸屏障对历史城堡的建造起了重要作用。在清水低地，人类活动的范围随着沿海低地地貌的发展而扩大。

The first purpose of this research is to clarify the geomorphic development of coastal barriers in Japan during the Holocene. Seven areas (the Ukishimagahara, Shimizu, Matsuzaki, Haibara, Tokoro, Sagami River Lowlands, and the Lake Hamana) are studied, because all of these areas represent typical coastal barriers in Japan.The results are summarized as follows.1.The presence of the primary barrier (developing during the Postglacial transgression) is confirmed in each area.2.The regional differences of the geomorphic development of the coastal barriers are recognized in time lag of the enclosure by barriers at the mouth of a bay or a drowned valley.3.The secondary barriers developed in the two phases on the regression after the culmination of the transgression, 5000 to 4000 yr B.P.and 3000 to 2000 yr B.P.The second purpose of this research is to discuss the influence of the development of barriers on human activity in the coastal lowlands. The studied areas are the Ukishimagahara, Kano River, and Shimizu Lowlands along the Suruga Bay.The results are summarized in the followings.1.The human activity in the Ukishimagahara Lowland had been influenced by the development of barriers.2.In the river mouth area of the Kano River Lowland, the coastal barriers have playd an important role in construction of the historical castles.3.In the Shimizu Lowland, the areas of human activity had expanded with the geomorphic development of the coastal lowland.