Preliminary Model of Potomac Estuary Phytoplankton
Preliminary Model of Potomac Estuary Phytoplankton
复制标题
波托马克河口浮游植物初步模型
DOI：
--
复制
发表时间：
1974
期刊：
影响因子：
--
通讯作者：
D. J. O'connor
中科院分区：
文献类型：
--
作者：
R. Thomann;D. Ditoro;D. J. O'connor
波托马克河口上游40英里河段的浮游植物动态的非线性，时间变量表示建模。包括氮和磷的再循环。敏感性分析表明，潮湾浮游植物对主航道叶绿素的贡献可达40 μg/l。磷在沉积物中的损失是显著的。通过河口的水流输送以及与河流流量增加有关的营养物和浮游植物特别重要。模拟结果表明，在非干旱水流和未经处理的营养盐负荷减少90%的情况下，主航道中的叶绿素浓度可能上升到50 μg/l，在潮汐海湾中可能上升到70 μg/l。这些浓度高于25微克/升的目标，但比目前的值低约60%。
The upper 40-mile reach of the Potomac Estuary is modeled by a nonlinear, time variable representation of phytoplankton dynamics. Nitrogen and phosphorous recycling is included. Sensitivity analyses indicate that phytoplankton from tidal embayments can contribute as much as 40 μg/l to observed chlorophyll in the main channel. Loss of phosphorous to the sediments is significant. Flow transport through the estuary and the nutrients and phytoplankton associated with increasing river flow are particularly important. Simulations indicate that under nondrought flows and a 90% reduction of untreated nutrient loads, chlorophyll concentrations in the main channel may rise to 50 μg/l and to 70 μg/l in tidal embayments. These concentrations are above an objective of 25 μg/l, but are about 60% less than present values.