著者

我原 弘昭 間辺 本文 瀬戸口 喜祥 吉村 直孝 佐保 哲康 幸 聖二

出版者

Japan Society of Civil Engineers

雑誌

海洋開発論文集 (ISSN:09127348)

巻号頁・発行日

vol.21, pp.1125-1130, 2005 (Released:2011-06-27)

参考文献数

5

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At the Nagasu fishing port of Oita Prefecture, the field survey on environmental-impact-assessment was carried out before and after dumping dredged sand into the shallow sea area. As comparing both field survey results, influence on fishing ground environment by dumping dredged sand into the shallow area was examined and evaluated. As a result of measuring the number of species and individuals and the amount of wet-weight of macro benthos in both bottom material, it showed that the condition of macro benthos of bottom material after dumping was almost similar to that before dumping. Therefore, it is considered that the influence of dumping dredged sand into shallow sea area around Nagasu Fishing Port would be temporary and little impact. In addition, planning the time of dumping dredged sand in this area, the consideration of avoiding the time of larva and juvenile of Marbled sole (Pleuronectes yokohamae) and the time of cultivate laver would be required.