| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Research Abstract |
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.
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