罗源湾海岸盐沼悬沙粒度及沉降速率的观测和分析
Observations and analysis of floc size and floc settling velocity at coastal salt marsh in Luoyuan Bay in Fujian Province, China
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摘要: 海岸盐沼对环境变化的响应非常敏感,是研究全球变化和人类活动对海岸带环境影响的典型区域之一。影响盐沼演化过程的一个非常重要的因素就是水体悬沙特性[1]。在沿岸水域环境中,有机和无机的细颗粒悬沙在物理和化学的作用下絮凝成大颗粒的絮凝体,其粒径和沉降速率通常是分散细颗粒悬沙的好几倍,因此絮凝过程基本上改变了细颗粒悬沙的水动力行为过程[2]。絮凝体因相对分散颗粒物有较高的沉降速率,水中的悬沙更容易沉降到滩面,控制着水体中的细颗粒物质的沉降通量[3]。
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