Numerical analysis of convective dispersion of pen shell Atrina pectinata larvae to support seabed restoration and resource recovery in the Ariake Sea, Japan
Numerical analysis of convective dispersion of pen shell Atrina pectinata larvae to support seabed restoration and resource recovery in the Ariake Sea, Japan
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DOI：
10.1016/j.ecoleng.2013.04.018
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发表时间：
2013-08-01
影响因子：
3.8
通讯作者：
Hirose, M.
中科院分区：
文献类型：
--
作者：
Tabata, T.;Hiramatsu, K.;Hirose, M.
在这项研究中，对流扩散的笔壳Atrina pectinata的幼虫进行了数值模拟，以支持有效的海底恢复在有明海，日本。建立了一个由连续性方程和Navier-Stokes动量方程组成的二维水深平均潮流模式，用于模拟有明海的潮流。然后，这个幼虫运输模型被用来预测漂流在潮流上的幼虫的迁移。为了确定海底恢复的有效区域，在模型中确定了14个释放点，作为笔壳潜在的新产卵场。计算每个释放点从这些点迁移到围栏贝壳可居住区域（深度：2 < h < 20 m，粒度中值直径：> 62.5 μ m）的幼虫数量。由于有明海内湾的反潮流余流，笔架壳幼虫也有反潮流轨迹。来自东北地区的幼虫扩散到大面积，而来自西北地区的幼虫只到达西部地区。大部分来自伊沙亚湾的幼虫从有明海的入海口流出。因此，从东北地区（特别是从13号点，Noku 210）释放的幼虫到达了最大的可居住区域。此外，大部分幼体最终漂流到伊沙亚湾，这表明东北部地区和伊沙亚湾的海底恢复将是恢复笔壳资源的最有效途径。(C)2013爱思唯尔有限公司版权所有。
In this study, numerical simulation of convective dispersion of the larvae of the pen shell Atrina pectinata was conducted to support effective seabed restoration in the Ariake Sea, Japan. A two-dimensional depth-averaged model consisting of a continuity equation and Navier-Stokes momentum equations was developed to reproduce tidal currents in the Ariake Sea. This larval transport model was then used to predict migration of larvae drifting on tidal currents. To determine effective areas for seabed restoration, 14 release points were defined in the model as potential new spawning grounds for the pen shell. The number of larvae that migrated from these points to habitable areas for pen shells (depth: 2 < h < 20 m, grain size median diameter: > 62.5 mu m) was calculated for each release point. Because of the anticlockwise tidal residual flow in the inner bay of the Ariake Sea, pen shell larvae also had anticlockwise trajectories. Larvae originating from the northeast area spread out over a large area, while larvae originating from the northwest area reached only the western area. Most of the larvae originating from Isahaya Bay flowed out through the mouth of the Ariake Sea. Consequently, larvae released from the northeast area (particularly from Point 13, Noku 210) reached the largest habitable area. In addition, most of the larvae ultimately drifted to Isahaya Bay, suggesting that seabed restoration in the northeast area and Isahaya Bay would be the most effective approach to recovery of pen shell resources. (C) 2013 Elsevier B.V. All rights reserved.