影响实施营养管理实践以控制流域级污染的有效性的来源和当地因素
Jiayi Hua1, Osama M Tarabih1, Rachael Z Cooper1
1Civil & Environmental Engineering Department, University of South Florida, Tampa, FL, USA.
The Science of the total environment
|January 21, 2026
概括
有针对性的最佳管理实践 (BMP) 战略,将营养来源和环境因素整合起来,有助于降低营养负载. 在高贡献率地区优先考虑BMP,以成本有效的方式最大限度地减少流域营养物质.
科学领域:
- 环境科学环境科学
- 水资源管理水资源的管理.
- 农业科学 农业科学
背景情况:
- 最佳管理实践 (BMP) 的实施往往无法整合营养来源和当地环境因素.
- 有效的营养管理需要采取有针对性的方法,考虑地块层面的贡献和特定地点的条件.
研究的目的:
- 开发和评估一个有针对性的BMP实施策略,以减少营养负载.
- 评估包裹级营养负载,土地利用和环境因素对BMP有效性的影响.
- 为流域规模的营养物质管理确定成本有效的BMP策略.
主要方法:
- 使用了地块级营养负载数据,土地使用,斜率,水表深度,溪流顺序和目标BMP放置的出口距离.
- 开发了十个增量实施场景 (10%到100%的源电池).
- 将四个选定的BMP应用于合适的土地用途,并使用流域评估模型模拟流域规模影响.
主要成果:
- 在100%情景下实现的最大的总 (TN) 减少 (1452和1204).
- 在10%的场景下观察到的最高成本效益 (每百万美元1.33和1.82TN).
- 在果园和改良牧场的BMP显示出显著的TN减少;在高负荷,高顺序流域的优先级最大限度地减少.
结论:
- 考虑到营养来源和环境因素的有针对性的BMP方法可以提高营养负载的减少.
- 在基线营养负载较高的源细胞中优先考虑BMP,并靠近更高阶流,这对于最大限度地提高流域效益至关重要.
- 将营养减少目标与成本效益相平衡,可以通过战略性BMP实施来实现,特别是在初始阶段.
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