Mediterranean Institute of Oceanography UM 110, Aix-Marseille Université, CNRS, IRD, Campus de Luminy, Marseille, France.
Mediterranean Institute of Oceanography UM 110, Université de Toulon, CNRS, IRD, La Garde, France.
PLoS One. 2018 Apr 25;13(4):e0195257. doi: 10.1371/journal.pone.0195257. eCollection 2018.
Our study highlights the Lagrangian transport of solid particles discharged at the Marseille Wastewater Treatment Plant (WWTP), located at Cortiou on the southern coastline. We focused on episodic situations characterized by a coastal circulation pattern induced by intrusion events of the Northern Current (NC) on the continental shelf, associated with SE wind regimes. We computed, using MARS3D-RHOMA and ICHTHYOP models, the particle trajectories from a patch of 5.104 passive and conservative fine particles released at the WWTP outlet, during 2 chosen representative periods of intrusion of the NC in June 2008 and in October 2011, associated with S-SE and E-SE winds, respectively. Unexpected results highlighted that the amount of particles reaching the vulnerable shorelines of both northern and southern bays accounted for 21.2% and 46.3% of the WWTP initial patch, in June 2008 and October 2011, respectively. Finally, a conceptual diagram is proposed to highlight the mechanisms of dispersion within the bays of Marseille of the fine particles released at the WWTP outlet that have long been underestimated.
我们的研究强调了在位于科蒂欧的马赛废水处理厂（WWTP）排放的固体颗粒的拉格朗日输运，该处理厂位于南部海岸线。我们关注的是由北海流（NC）入侵事件引起的沿海循环模式的偶发情况，这些事件与东南风有关。我们使用 MARS3D-RHOMA 和 ICHTHYOP 模型，计算了在 2008 年 6 月和 2011 年 10 月两次 NC 入侵期间，从 WWTP 出口释放的 5.104 个被动和保守细颗粒的一个斑块中的颗粒轨迹，这些斑块与东南风和东东南风分别相关。出乎意料的结果表明，到达北部和南部海湾脆弱海岸线的颗粒数量分别占 WWTP 初始斑块的 21.2%和 46.3%，这是在 2008 年 6 月和 2011 年 10 月。最后，提出了一个概念图，以突出显示长期以来被低估的 WWTP 出口释放的细颗粒在马赛湾内的分散机制。
