...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>海洋調查技術 >Migration and sedimentation of clastic sediments from beach to inner shelf off Miho Peninsula
【24h】

Migration and sedimentation of clastic sediments from beach to inner shelf off Miho Peninsula

机译：碎屑沉积物从海滩到美穗半岛内陆架的迁移和沉积

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The coastal erosion is a serious problem in Japan,especially along a coast of the Miho Peninsula,Shizuoka.Since 1980's,numerous coastal structures have been built and nourishments have been performed for protection and preservation of the coastline,however,it has not become a fundamental solution so far.The mechanisms of clastic sediment transport,timing of the coastal erosion,and an influence of the erosional debris to a seafloor are not clearly understood.It is important to examine the problem of the coastal erosion from the beach to the continental shelf comprehensively.This paper describes topographic changes from the beach to the inner shelf to see seasonal variation and examines the relation of the coastal erosion and clastic sediment transport The following results are discussed;1)A timing and amount of the coastal erosion are examined in wave-dominated zone.The coastal erosion occurs dominantly at summer and autumn seasons when several typhoons hit the coast,and the coastal geographical feature change in winter and spring seasons is not significant.The seafloor becomes depositional zone when the coastal erosion occurs.2)Several bulges of the sea floor(Coastal Swells)are found just seaward side of the coastal structures.Numerous linear and positive topographic features(Sand Ridges)are found off these Coastal Swells.The topographic characteristics determined by narrow multi-beam system and grain size analysis on dredged samples together suggest bottom materials of these positive topographic features are results from mass-transportation from the coast to shelf.3)Configurations of subaqueous dunes distributed at the northern part(the Hagoromo Spur)of the study area were clearly changed for about half a year.These changes reflect the influence of the storm,typhoons during summer and autumn seasons.4)Sedimentary environment is greatly different between the northern and southern parts of the study area.In the northern part(the Hagoromo Spur),clastic sediments are chiefly transported by the strong bottom current.In the southern part(off Komagoe),clastic sediments appear to be migrated by mass-transportation.
机译：海岸侵蚀是日本的一个严重问题，尤其是在静冈市美穗半岛沿岸。自1980年代以来，已经修建了许多沿海结构，并进行了养护以保护海岸线，但是，海岸侵蚀尚未成为一个严重问题。迄今为止尚无根本的解决方案。尚不清楚对碎屑沉积物的输送机制，海岸侵蚀的时机以及侵蚀性碎片对海底的影响。研究从海滩到大陆的海岸侵蚀问题很重要。本文描述了从海滩到内陆架的地形变化，以观察季节变化，并研究了海岸侵蚀与碎屑沉积物运输的关系。讨论了以下结果：1）研究了海岸侵蚀的时间和量波浪侵蚀带。沿海侵蚀主要发生在夏季和秋季，有数个台风袭击海岸，而沿海地带冬季和春季季节的图形特征变化不明显。当发生海岸侵蚀时，海底变成沉积区。2）在沿海结构的海侧发现了几个海底凸起（Coastal Swells）。狭窄的多波束系统和对疏samples样品的粒度分析共同确定的地形特征表明，这些正地形特征的底部材料是从海岸到陆架的大规模运输的结果。 3）研究区北部（Hagoromo支线）分布的水下沙丘的形态发生了半年左右的明显变化，这些变化反映了夏季和秋季的风暴，台风的影响.4）沉积环境是研究区域的北部和南部之间有很大的差异。在北部（Hagoromo支线），碎屑沉积物是南部（小驹江外），碎屑沉积物似乎是通过物质迁移而迁移的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号