Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
ISSN-L : 1883-8944
Volume 75 , Issue 1
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Paper (In Japanese)
  • Naoki SEO, Kenji HARADA, Takeshi KINPARA, So KAZAMA
    2019 Volume 75 Issue 1 Pages 1-9
    Published: 2019
    Released: March 20, 2019
     Under the Great East Japan Earthquake, Mound type Tsunami Evacuation Facility is focused in the reason of the survivors by being evacuated to Mound type Facility from Tsunami. On the basis of examination results in Fukuroi-city, Shizuoka-prefecture, SEO et al.1) proposed the design method of Mound type Tsunami Evacuation Facility. In this paper, the examination of crest height and stability of the structures are used the inundation depth on the result of tsunami simulation. Tsunami simulation implemented the high-resolution analysis to handle the surrounding houses as terrain. In this case, it is contemplated that the water rise may occur in the Tsunami Evacuation Facility, judging from the positional relationship between Tsunami Evacuation Facility to cause the flow inhibition and the surrounding houses. This paper reports the optimum separation distance between Tsunami Evacuation Facility and the surrounding houses.
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  • Tomohiro KUWAE, Goro YOSHIDA, Masakazu HORI, Kenta WATANABE, Toko TANA ...
    2019 Volume 75 Issue 1 Pages 10-20
    Published: 2019
    Released: June 20, 2019

     The role of shallow coastal ecosystems in climate change mitigation is drawing the attention of researchers, policy makers, and citizens. However, to date there has been no nationwide estimate of atmospheric carbon dioxide (CO2) uptake and carbon storage by shallow coastal ecosystems in Japan. In this study, in accordance with Intergovernmental Panel on Climate Change guidelines, we defined an ecosystem’s absorption/emission rate of atmospheric CO2 as its carbon stock change rate, and then estimated the CO2 sink potential of shallow coastal ecosystems throughout Japan. We estimated the present nationwide carbon sink potential to be 132 million tonnes CO2/year, with an upper limit of 404 million tonnes CO2/year. On the basis of this estimate, it may be possible to include shallow coastal ecosystems as a new CO2 sink under Japanese law and to incorporate them into existing marine environmental policies and frameworks.

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