密歇根湖近岸总的建模,使用链接的水力动力学和水质模型
James J Pauer1, Mark D Rowe2, Wilson Melendez3
1United States Environmental Protection Agency, Office of Research and Development, 6201 Congdon Blvd, Duluth, MN.
概括
密歇根湖附近的海岸超过了总 (TP) 目标,推动了藻类的繁荣. 水力动力学和河流负载推动了这些高TP水平,需要先进的建模来有效地管理水质.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 水质建模水质建模
背景情况:
- 海上密歇根湖达到总 (TP) 目标,但近海地区超过了限制.
- 升高的近岸TP有助于诸如 *Cladophora* 复苏等问题.
- 最近的大湖水质协议 (GLWQA) 的更新强调近岸条件评估.
研究的目的:
- 用水质模型评估目前密歇根湖近岸条件.
- 调查近海地区TP度升高的驱动因素.
- 评估基于的模型对近岸评估的有用性.
主要方法:
- 应用了多个版本的基模型与非结构化电网水力动力学模型相结合.
- 专注于密歇根湖近岸地区,受到大河和马斯基贡河的影响.
- 模型结果与观测数据和营养素-浮游生物-动物浮游生物-微生物-鱼 (NPZDM) 模型进行了比较.
主要成果:
- 模型和观察数据证实近岸TP度超过目标.
- 由于近岸的动态性质,TP度呈现出快速变化.
- 基于的模型有效地模拟了时间和空间趋势,尽管在预测个体观测方面的技能有所变化.
结论:
- 水力动力学和河流TP负荷是近岸TP度升高的主要驱动因素.
- TP模型是近岸评估的一个有价值,透明和用户友好的工具.
- 该模型有助于估计当前和未来的近岸TP度,以支持GLWQA目标.
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