风驱动的剪切应力对沉积物释放:对水质的影响,以及浅处河口的有害藻类繁殖
1Department of Oceanography and Coastal Sciences, College of Coast & Environment, Louisiana State University, Baton Rouge, LA, USA; Coastal Studies Institute, Louisiana State University, Baton Rouge, LA, USA.
The Science of the total environment
|December 16, 2025
概括
风力驱动的沉积物干扰显著增加了浅层河口的释放,加剧了有害的藻类繁殖. 了解这种不利流动对于有效的水资源管理至关重要.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 地质化学 地质化学
背景情况:
- 沉积物的内部负荷是优化和有害藻类繁殖 (HABs) 的关键驱动因素.
- 以前的研究主要集中在扩散流量上,低估了风力驱动的沉积物干扰在浅海沿海系统的影响.
研究的目的:
- 从浅浅的亚热带河口的沉积物中量化扩散性和附带性可溶性反应 (SRP) 流量.
- 评估风引起的沉积物干扰在调动中的作用.
主要方法:
- 在160个地点绘制沉积物地图,以确定梯度.
- 实验室化完整的沉积物核心,以测量有氧扩散流量.
- 使用Gust侵蚀微观宇宙来确定在不同的床负载切割应力下对向流.
主要成果:
- 扩散性SRP流量低于此前估计的,平均为0.13 mg P m−2 d−1.
- 附带流量平均为30.8毫克P m-2d-1,高达扩散流量的240倍.
- 随着切割应力,流量线性增加,这表明温和风的气动员是显著的.
结论:
- 风驱动的沉积物干扰是释放在浅浅河口的关键,经常被忽视的途径.
- 季节性风力模式,如寒风和热带风暴,可以显著影响的可用性和HAB动态.
- 纳入营养预算中的辅助流量对于准确的水质管理和HAB缓解策略至关重要.
相关概念视频
Primary Production
25.0K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
25.0K
The Phosphorus Cycle
43.5K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
43.5K
Fluid Pressure over Flat Plate of Constant Width
2.4K
When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...
The resultant force...
2.4K


