Tsunamis and Storm Surge: Introduction to Coastal Disasters | WasedaX on edX | Course About Video


[MUSIC] Welcome to Waseda University. Hello, I am Tomoya Shibayama. I’m a professor in the Department of Civil
and Environmental Engineering at Waseda. On March 11, 2011, a big tsunami attacked the coastal areas of
the northeastern part of Japan. The tsunami flooded over land, and devastated the local
communities in the areas. First, tsunami ran up through river and
flooded over land. Also tsunami flooded over coastal line and
destroyed paddy fields and houses. If we see offshore, tsunami wave broke and
proceeded to shore as bore like wave. The third or
fourth waves attacked continuously. In the history of the world,
the Indian Ocean tsunami in 2004 and the Chilean tsunami in 2010
are among the recent ones. The first tsunami recorded in
Japan is Hakuho Tsunami in 684, over 1,300 years ago. In this course, we will learn about coastal disasters
including tsunami and storm surge. Since Japan has long
disaster experiences and has achievements of disaster
prevention research for a long time, we believe it is worthwhile to deliver our
knowledge to foreign countries including developing countries in Asia and
Africa from Waseda. We would like to contribute for improvements of disaster
preparedness over the world. In order to learn realities of disasters, we need to use the following
three basic methods. The first one is field surveys. These are the photos of Sri Lanka and
Indonesia for Indian Ocean tsunami in 2004. The Tohoku tsunami in 2011 and the storm surge Nargis in Myanmar in 2008. The second one is numerical simulations. And this is calculated
typhoon route in Japan after global warming, and
possible tsunami comes to Tokyo Bay. The third one is hydraulic
laboratory experiments. This is wave basin experiment for
tsunami flow over coastal dike. And wave flume experiment for
velocity field for flooded water. By using these three methods,
we will analyze coastal disasters and will propose effective countermeasures
to protect residents in coastal areas. Please join our course for
coastal disasters. We are waiting for you in Waseda.

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