2 0 0 0 OA 大洗磯浜海岸における花崗岩礫の追跡調査
- 著者
- 本島 真也 小林 昭男 宇多 高明 遠藤 将利
- 出版者
- 公益社団法人 土木学会
- 雑誌
- 土木学会論文集B2(海岸工学) (ISSN:18842399)
- 巻号頁・発行日
- vol.69, no.2, pp.I_721-I_725, 2013 (Released:2013-11-12)
- 参考文献数
- 5
- 被引用文献数
- 2
On the Oharai-Isohama coast, 1×104 m3 of gravel and 2.5×103 m3 of fine sand were nourished in April and May 2012 as a measure against beach erosion. Simultaneously tracer test was carried out using 100 m3 of granite gravel with a diameter of 20 cm, which was not deposited on the original beach. Granite gravel was placed on the shoreline, and subsequent movement was measured using GPS along with the measurement of the diameter of the gravel. It was found that gravel was transported northward and deposited on the shoreline.
1 0 0 0 OA 粗粒材養浜後の円磨度の変化とすりへり試験
- 著者
- 黒澤 祐司 小林 昭男 宇多 高明 野志 保仁 遠藤 将利 古谷 真広
- 出版者
- 公益社団法人 土木学会
- 雑誌
- 土木学会論文集B2(海岸工学) (ISSN:18842399)
- 巻号頁・発行日
- vol.68, no.2, pp.I_1461-I_1465, 2012 (Released:2012-11-15)
- 参考文献数
- 5
- 被引用文献数
- 1
In beach nourishment using gravel, the macadam gravel is used so that the sharp-pointed shape of gravel is of concerned. In this study, the change in the shape of gravels due to wave abrasion was investigated. Gravel samples were collected from the Jinkoji and Akashi coasts in Ibaraki Prefecture, where beach nourishment using coarse materials have been carried out since 2005, and grain size and roundness were measured. It was found that roundness of gravels with an initial value of 0.2 converged to 0.4-0.5 within four years and nine months. Due to the abrasion test of sampled gravels without steel bowls, the content of gravel was as high as 92% of all the volume after the rotation of 1200 times.