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Coastal Landform Evolution and Environmental Changein the Late Holocene

全新世晚期滨海地貌演化与环境变化

基本信息

批准号：
11480020
负责人：
UMITSU Masatomo
金额：
$ 9.09万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

This research aims to clarify the late Holocene coastal landform evolution in relation to environmental change especially sea-level change, sediment supply and human impact. Field research were done in whole Japan (Koike, Matsubara) Hokkaido (Ohira) , Shizuoka (Matsubara), Aichi, Mie (Umitsu, Kawase), Okinawa (Hasegawa, Fujimoto) prefectures and Thailand (Fujimoto, Umitsu) and so on. Detail land form evolution was studied in the Tokachi-gawa and Kumozu-gawa lowlands and clarifeid the change of paleo-coastlines. Coastal change and land form evolution was also studied in the Chao Phraya delta, Thailand and Shoalhaven Lowland, Australia. These researches clarified the detail coastal land form evolution in relation to the sediment supply and sea-level change. These relationships werenot well clarified in the former studies. Coral breaching in the Ishigaki Island, Okinawa was studied by Hasagawa, and clarified that the phenomenon relates to the seasonal change of temperature and human activities especially change of land use. Late Holocene sea-level change and carbon concentration in the coastal lowland of Okinawa and Thailand were studied by Fujimoto, and discussed the minor sea-level fluctuation and mangrove peat formation. He clarified that the carbon concentration in the subsurface sediment including mangrove peat is largerthan the trunk and leaf parts. Characteristics of the Japanese coastal land forms were summarized by Koike. Matsubara also discussed on the evolution of Japanese coastal barriers.

本研究旨在阐明全新世晚期海岸地貌演化与环境变化特别是海平面变化、沉积物供应和人类影响的关系。在日本全国（小池县、松原县）、北海道（大平县）、静冈（松原县）、爱知县、三重县（海津县、川濑县）、冲绳县（长谷川县、藤本县）和泰国（藤本县、海津县）等地进行了实地调查，详细研究了十胜川和云水川低地的地貌演变，阐明了古海岸线的变化。还研究了泰国湄南河三角洲和澳大利亚肖尔黑文低地的海岸变化和地貌演变。这些研究阐明了海岸地貌演变与沉积物供给和海平面变化的关系。这些关系在以往的研究中没有得到很好的阐明。Hasagawa对冲绳石垣岛的珊瑚破裂现象进行了研究，阐明了这一现象与温度的季节变化和人类活动特别是土地利用的变化有关。Fujimoto研究了冲绳和泰国沿海低地晚全新世海平面变化和碳浓度，并讨论了海平面的微小波动和红树林泥炭的形成。他解释说，包括红树林泥炭在内的地下沉积物中的碳浓度大于树干和树叶部分。小池总结了日本沿海地貌的特征。松原还讨论了日本海岸屏障的演变。