石炭灰造粒物を用いた生育基盤におけるアマモ場の形成過程と維持機構  [in Japanese] EELGRASS BED PROMOTION PROCESS AND RETENTION MECHANISM ON THE CONSTRUCTED ARTIFICIAL BED WITH GRANULATED FLY ASH  [in Japanese]

Access this Article

Author(s)

Abstract

ヘドロが堆積した海域にアマモ場を再生するために,広島港に造成した石炭灰造粒物基盤において,アマモ場の複数年にわたる群落の維持,地盤との活着機構について調査した.懸念された石炭灰造粒物基盤の地形変動は低潮位時に波の影響を受けるものの,一定期間後には安定することが明らかになった.また,石炭灰造粒物で造成した生育基盤では,アマモの地下茎と細根が基盤の細部に入り込み,草体の流出を防ぐとともに地形の安定化に寄与している.この結果から,石炭灰造粒物で造成したアマモ生育基盤は,長期的かつ効果的にアマモ場を形成する手法として有効といえる.

 In order to establish a restoration technique for eelgrass bed of Zostera marina in coastal region where thick sludge deposit is present, the applicability of granulated coal fly ash as the construction material of the growth base was investigated. Although the granular artificial growth base showed the tendency of being affected by wave actions at low tide, it had eventually stabilize sufficiently. Porous structure of the growth base contributed to the rapid growth of the rhizomes and roots. As a result, it was possible to maintain the eelgrass bed in the region and, in turn, to enhance the stability of the favorable coastal environment. It was concluded that the eelgrass growth base of granulated coal fly ash is an effective technique to establish a stable seagrass bed in coastal waters.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 69(2), I_1072-I_1077, 2013

    Japan Society of Civil Engineers

Codes

Page Top