评估从陆地到淡水系统的营养命运,使用中国福湖盆地的半分布式模型
Jinhui Zhou1, José M Mogollón1, Peter M van Bodegom1
1Institute of Environmental Sciences (CML), Leiden University, Leiden, the Netherlands.
The Science of the total environment
|February 19, 2024
概括
农业加剧了环境压力,导致由和排放而导致的肥胖化. 一个新的模型显示,分散的来源,主要是农田,对福湖盆地营养物质负载作出了重大贡献.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 农业科学 农业科学
背景情况:
- 强化农业对淡水生态系统施加了重大压力,主要是通过 (N) 和 (P) 排放,导致过度化.
- 有效的环境战略需要准确量化营养物质的运输和命运,但数据的局限性阻碍了农业地区的传统建模.
研究的目的:
- 开发和应用一个局部化的半分布式模型来模拟 (TN) 和 (TP) 在湖流域的河流中.
- 为了识别和量化盆地内的各种排放源的营养贡献.
- 评估提高营养使用效率对减少分散营养负载的影响.
主要方法:
- 开发一个本地化的半分布式模型来模拟TN和TP.
- 该模型应用于中国福湖盆地的52条河流.
- 分析不同土地使用类型 (建筑环境,农田,森林) 的营养负载贡献.
主要成果:
- 分散源占TN的82%和TP装载的92%进入河流.
- 农田是主要贡献者,占 49% 的扩散TN和 57% 的扩散TP.
- 营养使用效率提高10%可以使N分散载荷减少5%,P分散载荷减少30%.
结论:
- 分散的农业来源是福湖盆地营养污染的主要原因.
- 准农田管理和提高营养使用效率对于减轻肥大化至关重要.
- 开发的建模方法为评估其他农业流域的营养动态提供了可转移的框架.
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