一条河流到达多少营养物质:来自混合模型的见解以及对流域出口和除去的影响
Zhenyu Zhang1, Jinliang Huang2, Shengyue Chen2
1School of Geographical Sciences, Fujian Normal University, Fuzhou, 350007, China; Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, 361102, Xiamen, China.
Journal of environmental management
|May 11, 2024
概括
过度的 (N) 污染威胁到淡水生态系统. 这项研究开发了一种混合模型来分析N的出口和移除,发现土地使用位置对N产量和流入过程产生重大影响.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 生物地质化学生物地质化学
背景情况:
- 过多的 (N) 排放到河流中会降低全球淡水质量.
- 了解土地利用模式对河流N出口和移除的影响至关重要,但不完整.
- 人类活动显著改变流域生物地质化学和N动态.
研究的目的:
- 开发和验证一种混合模型,用于分析流域内的出口和除去.
- 研究土地利用模式及其空间分布对河流气动态的影响.
- 提供一个空间显式的建模方法,以支持基于土地使用的管理.
主要方法:
- 开发用于河流 (N) 建模的混合模型.
- 使用KGE和R2指标进行模型校准和验证.
- 根据土地使用类型 (城市,农业,林业) 分析产量和出口.
- 评估生物N去除过程,包括脱的温度敏感性.
主要成果:
- 混合型号在校准/验证过程中表现出高性能,KGE为0.75/0.76和R2为0.72/0.61.
- 城市化下水域的净N出口最高,其次是农业和森林地区.
- 农业活动是N出口的主要贡献者,农业用地使用的N投入很大.
- 脱率在洪水季节是最高的,特别是在受人类影响的分流域,这表明温度敏感性和潜在的基质限制.
结论:
- 土地使用量和位置是流域生物地球化学和动态的关键驱动因素.
- 空间显式建模对于准确表示营养出口和去除过程至关重要.
- 该研究强调了需要改进的流域模型,包括空间模式,以有效地管理N.
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