Download Applied Geomorphology for Mitigation of Natural Hazards by Masahiko Oya (auth.) PDF

By Masahiko Oya (auth.)

There are many traditional dangers similar to floods, landslides, volcanoes and earthquakes within the Asia-Pacific zone. however, there are few stories of such traditional risks during this zone and data approximately their mitigation is of the maximum value.
This booklet records using geomorphological maps displaying the country of flooding; those maps permit predictions to be made. the writer has compiled geomorphological maps and documentation in their validation, and the maps permit not just estimation of flooding, but additionally prediction of soil liquefaction as a result of earthquakes.
Audience: the result of the discussions during this booklet follow not just to geographers, specialists, engineers and coverage makers in Japan and Southeast Asian international locations, but in addition to these from Europe, North the US, and Africa.

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2 centimeters. lbis crustal movement has been partly responsible for stopping sand and gravel from being carried to the river's lower reaches. , 1957). 5). This is mainly due to erosion, to dips in the ground along the river course and to the much greater deposition by the tributaries along the foothills than nearer the main river course. Owing to this peculiar topography, floodwater flows from the higher surrounding area into the river. In fact, when overflow does occur, the floodwater does not disperse but flows back into the river farther down.

If so, almost all of the plains, including Saga, would be flooded, with great damage resulting. Applying the phenomenon seen during the Ise Bay Typhoon, the tidal wave would dissipate close to the seacoast. e. the line connecting Saga and the Sagaego River. Therefore, the Ariake Sea Lowland can be divided as following: a) areas that would be devastated by the high wave, b) areas that would be partly devastated by the high wave and seawater, and c) areas that would be only slightly submerged by seawater (Figure 3.

The Nobi Plain has been devastated by tidal waves 10 times since 1868. Waves on Sept. 11, 1889, and Sept. 11, 1896, were particularly high. While the flood levels resulting from the two high waves were different, their limits were the same-namely, Tsushima. The recognition that Tsushima has been the extreme limit in a number of floods caused by typhoons is important, as it allows us to forecast tidal limits by geomorphological survey. From this perspective, the author studied the plain along the Ariake Sea in Kyushu.

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