权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Formative Proceesses and Geomorphological Characteristics of Coastal Sand Dunes from the view point of sediment material

从沉积物角度看滨海沙丘的形成过程及地貌特征

基本信息

批准号：
16500646
负责人：
KODAMA Yoshinori
金额：
$ 2.57万
依托单位：
Tottori University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16500646/
关键词：
Enshu-nada Coastal Dune Katamachi Coastal Dune Tottori Coastal Dune Paleo Environments Availability of Sediments Wave and Blown Sand Processes Wind Tunnel Experiment Vegetation Management by Sandblasting ボーリングコア試料粘土混濁水の電気伝導度分析古環境の変遷

项目摘要

We conducted research on historical development, formation processes and characteristic of geomorphology of coastal sand dunes in Japan from the sediment material points of view. Three field sites were surveyed intensively: the Enshu-nada Sand Dune at Shizuoka Prefecture, the Katamachi Sand Dune at Niigata Prefecture and the Tottori Sand Dune at Tottori Prefecture. The width of the coastal dunes along the Enshu-nada increases from 100m to more than 1,200m towards the east from the mouth of the Tenryu River. In contrast, moving away from the mouth of the Tenryu River, the beach width decreases from 260m to 30m. We surveyed size distributions of beach sediments and beach profiles and concluded that grain size distribution of berm deposits had clue to development of coastal dunes. Interaction between wave processes and blown sand ones were discussed. On the other hand, the Katamachi Sand Dune similarly illustrates that moving away from the mouth of the Seki River; size of the coastal sand … More dune increases. Mineral compositional surveys over the drainage basin of the Seki River revealed that longitudinal dunes were developed at c.a. 80,000-50,000y.B.P., triggered by the volcanic activity of the Myoukou Volcano. Historical formative processes of the Katamachi Sand Dune explain dimensional variations of the dune. Formation processes of the Tottori Sand Dune were surveyed with boreholes (named as B5 and B6) and microtremor measurements. With facies, sequence stratigraphy, diatom, pollen, paleo magne and electorical conductivity analyses as well, we are still discussing paleo environmental changes before the formation of the sand dune. In addition, formation processes of the Oigo-Suribachi at the Tottori Sand Dune were surveyed by wind tunnel experiments and proposed its conservational provision. As for countermeasures for meadow overgrowth at the Tottori Sand Dune, we conducted field experiments for vegetation mapagement using sandblasting and seawater spraying and got some valuable results. Less

从沉积物物质的角度，对日本海岸沙丘的历史发展、形成过程和地貌特征进行了研究。对三个实地点进行了深入调查：静冈县的恩州那达沙丘、新泻县的片町沙丘和鸟取县的鸟取沙丘。从天龙河口向东，沿恩州那达的海岸沙丘沿着的宽度从100米增加到1,200米以上。相反，远离天龙河口，海滩宽度从260 m减小到30 m。通过对海滩沉积物和海滩剖面粒度分布的研究，认为滩肩沉积物的粒度分布对海岸沙丘的发育有一定的指示作用。讨论了波浪过程与风沙过程的相互作用。另一方面，片町沙丘也同样说明了从关川河口向外移动， ...更多信息沙丘增加。在关河流域的矿物成分调查显示，纵向沙丘在c. a。80，000 -50，000 y.B.P.，由Myoukou火山的火山活动引发。片町沙丘的历史形成过程解释了沙丘的尺寸变化。鸟取沙丘的形成过程进行了调查钻孔（命名为B5和B6）和微动测量。通过岩相、层序地层、硅藻、孢粉、古地磁、电导率等分析，探讨了沙丘形成前的古环境变化。此外，在鸟取沙丘的Oigo-Suribachi的形成过程进行了调查，通过风洞实验，并提出了其保护规定。针对鸟取沙丘草甸植被过度生长的对策，我们进行了喷砂和海水喷洒的植被测绘野外试验，取得了一些有价值的结果。少