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.

这项研究旨在阐明与环境变化有关的全新世沿海地面进化，尤其是海平面变化，沉积物供应和人类影响。现场研究是在整个日本（Koike，Matsubara）北海道（ohira），Shizuoka（Matsubara），Aichi，Mie（Umitsu，Kawase），Okinawa（Okinawa（Hasegawa，Fujimoto）县）和泰国（Fujimoto，Umitsu）等。在Tokachi-Gawa和Kumozu-Gawa Lowlands和ClarifeId中，研究了详细的土地形态进化，并改变了古coastlines的变化。还研究了泰国的Chao Phraya三角洲和澳大利亚Shoalhaven Lowland的沿海变化和土地形态的进化。这些研究阐明了与沉积物供应和海平面变化有关的沿海土地形成的细节。这些关系在以前的研究中很好地阐明了。 Hasagawa对冲绳Ishigaki岛的珊瑚破裂进行了研究，并澄清说，这种现象与温度和人类活动的季节性变化有关，尤其是土地使用的变化。藤本托托（Fujimoto）研究了冲绳和泰国沿海低地的全新世海平面变化和碳浓度，并讨论了次要的海平面波动和红树林泥炭的形成。他澄清说，包括红树林泥炭在内的地下沉积物中的碳浓度在树干和叶片部位更大。 Koike总结了日本沿海土地形式的特征。 Matsubara还讨论了日本沿海屏障的演变。