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

By Masahiko Oya (auth.)

There are many normal risks reminiscent of floods, landslides, volcanoes and earthquakes within the Asia-Pacific area. however, there are few stories of such average dangers during this quarter and information approximately their mitigation is of the maximum significance.
This booklet files using geomorphological maps exhibiting the kingdom 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 in addition prediction of soil liquefaction because of earthquakes.
Audience: the result of the discussions during this booklet practice not just to geographers, experts, engineers and coverage makers in Japan and Southeast Asian nations, but in addition to these from Europe, North the United States, and Africa.

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6. Combination of Overflowing and Concentration Types: The Kano River A third type, which is rather rare, can be created by combining the two main types. The upper and lower parts of the Kano River Plain in the Izu Peninsula are separated by narrows in the river channel. Those narrows are formed by Mount Kanuki and by the Mishima Fan, which consists ofmudflow from Fuji Volcano. Natural levees and back-marshes are developed in the Takata Plain. ). At that time, thick marine clay was deposited.

472 billion at that time) in property was lost. The features of the flood were almost identical to those predicted by the map, demonstrating its utility. 1). 1 The city ofGifu is situated on the fan of the Nagara River. 2 A persimmon orchard covers a natural levee in the Nobi Plain The back-marsh is used as a paddy field. 2. FEATURES OF FLOODING Flood features, such as the extremities of inundation, the depth of the stagnant water, its period of stagnation, the velocity of the flood current and the levels of erosion and deposition, vary remarkably according to a region's landforms.

Many shell mounds have been discovered in the northern part of the lowland but none in the southern part. 5). The author considers that an imaginary line connecting Saga with Sagaego River shows a former coastline, correlating with the line connecting Nagoya with Tsushima in the Nobi Plain. ($1 4 5 ~. 5 Topographical survey map of the lower reaches of the Chikugo River (Oya, 1957; modified) (I) Mountain, (2) Terrace, (3) Fan, (4) Lower fan, (5) Natural levee, sandbank or artificially filled field, (6) Delta, (7) Former river course, (8) Dry riverbed, (9) Tidal land, (10) River, (11) Embankment.

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