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Book Cover
Author Uda, Takaaki, 1949-

Title Japan's beach erosion : reality and future measures / Takaaki Uda
Published Singapore ; Hackensack, NJ ; London : World Scientific, [2010]
Online access available from:
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Description 1 online resource (x, 418 pages) : illustrations, maps
Series Advanced series on ocean engineering ; v. 31
Advanced series on ocean engineering ; v. 31
Contents 1. What is beach erosion? -- 2. Beach erosion -- current reality. 2.1. Classification of causes of beach erosion. 2.2. Beach erosion due to obstruction of longshore sand transport. 2.3. Beach erosion triggered by construction of wave-sheltering structures. 2.4. Beach erosion due to decrease in fluvial sediment supply. 2.5. Beach erosion triggered by offshore sand mining/dredging. 2.6. Beach erosion triggered by construction of detached breakwater as countermeasure. 2.7. Disappearance of natural sand dunes due to excess planting of coastal forest. 2.8. Disappearance of sandy beach triggered by construction of gently sloping revetment -- 3. Practical models for predicting beach changes. 3.1. Characteristics of practical models. 3.2. Prediction of stable shoreline on Pocket Beach. 3.3. Three-dimensional model for predicting beach changes using Hsu and Evans' model. 3.4. Predictive model of three-dimensional beach changes on coast with a seawall by expanding Hsu and Evans' model. 3.5. Simple model for predicting three-dimensional beach changes on statically stable beach. 3.6. Shoreline change model on coasts composed of sand of mixed grain size. 3.7. Predictive model of shoreline and grain size around river mouth. 3.8. Contour-line change model considering stabilization mechanism of longitudinal profile. 3.9. Contour-line change model solved on x-y meshes -- 4. Beach erosion as structural problem. 4.1. Introduction. 4.2. Institutional (legal) issues related to beach erosion. 4.3. Technical issues related to beach rrosion. 4.4. Concrete measures
Summary Beaches in Japan have been eroding since the 1970s as a result of the artificial land alterations. Approximately 3000 fishing ports and 1000 commercial ports have been built nationwide, as well as 2532 large dams being constructed in the upstream basins of large rivers. Due to the port and dam developments, fluvial sand supply has significantly reduced resulting in shoreline recession around the river mouths. Continuous sand supply along the coastline has also been obstructed by the port breakwaters. The formation of wave shelter zone by the port breakwaters induce longshore sand transport, thereby leading to an accretion of large amount of sand in the wave shelter zone and erosion in the surrounding area. Thus, almost all causes of the beach erosion in Japan are due to anthropogenic factors. The exact situation of the beach erosion has never been clear in literatures that are written in Japanese, or in English. Coastal engineers can and should learn from these results, otherwise the same situation and problems, which were induced by excessive coastal development without protection measures and due attention given to nearby coasts, will recur throughout the world. Textbooks on coastal engineering, that were already published, describe only the theoretical fundamentals of the subject, but lack the practical perspectives and field studies. The book examines many coastal areas as examples, highlighting the various erosion factors which should be avoided elsewhere globally. This book was first published in Japanese in 2004, and was translated into English by the present author
Bibliography Includes bibliographical references and index
Notes Translated from the Japanese
Print version record
Subject Beach erosion -- Japan.
Shore protection -- Japan.
Form Electronic book
ISBN 9789814277136 (electronic bk.)
9814277134 (electronic bk.)