Vegetation for tsunami protection


Energy consumed by vegetation


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Firstly, evaluate wave energy consumed by vegetation.

Secondly, priority is calculations.

Thirdly, do not use calculations from other Journals, calculate everything yourself and have your own data.

Further, project is about how vegetation can protect land from the tsunami.

Also, calculate how much energy the vegetation absorbs from the tsunami, and then explain your calculations.

Finally, explain your data and the outcome of the calculations.

More details;
This study explored the effects of coastal vegetation on tsunami damage based on field observations carried out after the Indian Ocean tsunami on 26 December 2004. Study locations covered about 250 km (19 locations) on the southern coast of Sri Lanka and about 200 km (29 locations) on the Andaman coast of Thailand.

The representative vegetation was classified into six types according to their habitat and the stand structures of the trees.

The impact of vegetation structure on drag forces was analyzed using the observed characteristics of the tree species. The drag coefficient, including the vertical stand structures of trees, C d-all, and the vegetation thickness (cumulative trunk diameter of vegetation in the tsunami direction) per unit area, dN u (d: reference diameter of trees, N u : number of trees per unit area), varied greatly with the species classification.

Based on the field survey and data analysis, Rhizophora apiculata and Rhizophora mucronata (hereafter R. apiculata-type), kinds of mangroves, and Pandanus odoratissimus, a representative tree that grows in beach sand, were found to be especially effective in providing protection from tsunami damage due to their complex aerial root structure.

Two layers of vegetation in the vertical direction with P. odoratissimus and Casuarina equisetifolia and a horizontal vegetation structure of small and large diameter trees were also important for increasing drag and trapping floating objects, broken branches, houses, and people.



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