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多向命运路径模型将排放与淡水缩潜力联系起来

Yujie Zhuang¹, Xin Liu¹, Jinhui Zhou²

¹State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, P. R. China.

Environmental science & technology

|July 2, 2024

概括

这项研究通过考虑复杂的污染途径和未经处理的点源排放来改进淡水优化潜力 (FEP) 建模. 改进的建模显示了更广泛的FEP分布,有助于针对性的环境保护战略.

科学领域:

环境科学环境科学
生态系统建模生态系统建模
水质管理水质管理

背景情况:

人类产生的 (P) 排放对水生生态系统造成重大压力,量化为淡水优化潜力 (FEP).
现有的P命运模型经常使用简化的算法,这些算法不能准确地代表复杂的污染路径,例如地下基础设施和河流分叉.
需要改进P命运建模,包括多种排放源和多方向流动场景.

研究的目的:

通过结合各种P命运路径和多方向场景来增强淡水优化潜力 (FEP) 建模.
通过包括潜在的未经处理的点源排放 (PSu) 来更新P估计.
在快速城市化地区评估改进的P命运建模方法.

主要方法:

开发了一种改进的P命运模型,该模型考虑了地下管道,废水处理基础设施和河流分叉.
将未经处理的潜在点源排放 (PSu) 整合到P估计中.
将增强模型应用于中国太湖盆地,在2017年的100米×100米空间分辨率下.

主要成果:

发现未经处理的点源排放 (PSu) 对FEP (62.6%) 的贡献大于它们对整体P排放 (58.5%) 的贡献.
与以前的方法相比,改进的命运建模导致FEP的空间分布更广泛.
该研究强调了特定的P源和复杂的命运路径对水生生态系统的重大影响.

结论:

增强的P命运建模方法可以更准确地评估淡水优化潜力.
未经处理的点源排放在推动温和化方面发挥着至关重要的作用,需要具体的管理干预措施.
这些发现有助于制定更有针对性和有效的监管策略,以管理水生环境中的P污染.

关键词:

描述因素是表征的因素.排放量清单排放量清单是指排放量清单,是指排放量清单.环境命运环境命运环境命运环境管理环境管理环境管理欧化的评估评估.营养成分营养成分的营养.

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相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

Bioremediation

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

What are Biogeochemical Cycles?

What are Biogeochemical Cycles?

The most common elements in organic molecules, carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus, are only available in the ecosystem in limited amounts. Therefore, these nutrients must be recycled through both biotic and abiotic components of the ecosystem, in processes generally called biogeochemical cycles.