Morphological Characteristics of River Mouths After the 2011 Tohoku Tsunami in Miyagi Prefecture
Morphological Characteristics of River Mouths After the 2011 Tohoku Tsunami in Miyagi Prefecture
复制标题
2011年东北海啸后宫城县河口形态特征
DOI：
10.1007/978-3-319-28528-3_10
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Hitoshi Tanaka
中科院分区：
文献类型：
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作者：
M. Roh;Y. Mitobe;Hitoshi Tanaka
2011年海啸过后，日本东北地区的海岸线和河口正在稳步恢复。受影响的沙质海岸线和河口比相应的悬崖、岩石海滩和坚硬结构发生了更显著的变化。对与海啸前和海啸后情况有关的航空照片和地形数据的分析，以及估计的河口最小宽度和位置变化，说明了河口的变化以及恢复过程中的差异。在许多情况下，有稳定恢复的迹象，尽管行为倾向不同，如名取河和纳尔兹河的情况。研究表明，这些河口的时间地形变化及其与潮汐棱柱的关系不同，导致了不同的泥沙淤积和恢复过程。泥沙供应与河口形态的变化有着错综复杂的联系，而河口形态的变化反过来又反映了河口的恢复。河口的形态变化给港口和港口带来了实际的河流管理和维护问题；因此，持续监测是必不可少的。
Coastlines and river mouths along the Tohoku Region in Japan are in the process of steady recovery following the 2011 Tsunami. The affected sandy coastlines and river mouths have undergone more significant changes than the corresponding cliffs, rocky beaches, and hard structures. Analyses of aerial photographs and topographic data related to pre-tsunami and post-tsunami conditions together with the estimated minimum width and positioning changes of river mouths describe how they have changed as well as the differences in their recovery processes. In many cases, there is an indication of stable recovery although the behavioral tendency differs, as in the case of the Natori and Naruse rivers. This study shows that the temporal topographic changes and the relationship with the tidal prism in the mouths of these river mouths differ, resulting in different sediment deposition and restoration processes. Sediment supply is intricately associated with the morphological changes in river mouth morphological changes, which in turn reflect on its recovery. The morphological changes in a river’s mouth present practical river management and maintenance problems in ports and harbors; consequently, continuous monitoring is essential.