Tsunami current inundation of ground with coastal vegetation effects; an initial step towards a natural solution for tsunami amelioration
Tsunami current inundation of ground with coastal vegetation effects; an initial step towards a natural solution for tsunami amelioration
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海啸淹没地面并影响沿海植被；
DOI：
10.1142/s179343110800030x
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发表时间：
2008
影响因子：
1.5
通讯作者：
K. Tanimoto
中科院分区：
文献类型：
--
作者：
N. Nandasena;N. Tanaka;K. Tanimoto
利用一维数值模式，结合地形和海啸特征，对香樟海岸密集植被带对海啸能量的消减作用进行了定量分析。阻力和惯性力被假定为植被产生的总阻力。结果发现，一个相对较小的周期的海啸波比一个相对较大的周期的海啸波相同的高度，更具有破坏性，虽然茂密的植被有效地减少了海啸能量的情况下，小周期的海啸波。一个非常温和的地面斜坡也更容易受到海啸波的冲击比一个相对陡峭的地面斜坡。此外，密集生长的海岸植被非常温和的地面坡度比相同的植被相对陡峭的地面坡度更有效地消散海啸能量。
A densely grown coastal vegetation belt of Pandanus odoratissimus for reducing the tsunami energy was quantitatively analyzed by an enhanced one-dimensional numerical model that included variations of topography and tsunami characteristics. The drag and inertia forces were assumed as the total resistance generated by the vegetation. It was found that a relatively small period tsunami wave was more destructive than a relatively large period tsunami wave of the same height, although densely grown vegetation effectively reduced the tsunami energy in the case of the small period tsunami wave. A very mild ground slope was also more vulnerable to thrashing by tsunami waves than a relatively steep ground slope. Moreover, densely growing coastal vegetation on very mild ground slope dissipated tsunami energy more efficiently than the same vegetation on relatively steep ground slope.