Yujie Zhuang, Xin Liu, Jinhui Zhou, Hu Sheng and Zengwei Yuan*,
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引用次数: 0
Abstract
Excessive anthropogenic phosphorus (P) emissions put constant pressure on aquatic ecosystems. This pressure can be quantified as the freshwater eutrophication potential (FEP) by linking P emissions, P fate in environmental compartments, and the potentially disappeared fraction of species due to increase of P concentrations in freshwater. However, previous fate modeling on global and regional scales is mainly based on the eight-direction algorithm without distinguishing pollution sources. The algorithm fails to characterize the fate paths of point-source emissions via subsurface pipelines and wastewater treatment infrastructure, and exhibits suboptimal performance in accounting for multidirectional paths caused by river bifurcations, especially in flat terrains. Here we aim to improve the fate modeling by incorporating various fate paths and addressing multidirectional scenarios. We also update the P estimates by complementing potential untreated point-source emissions (PSu). The improved method is examined in a rapidly urbanizing area in Taihu Lake Basin, China in 2017 at a spatial resolution of 100 m × 100 m. Results show that the contribution of PSu on FEP (62.6%) is greater than that on P emissions (58.5%). The FEP is more spatially widely distributed with the improved fate modeling, facilitating targeted regulatory strategies tailored to local conditions.
过量的人为磷(P)排放给水生生态系统带来了持续的压力。这种压力可以量化为淡水富营养化潜能值(FEP),将磷排放、磷在环境分区中的归宿以及因淡水中磷浓度增加而可能消失的物种数量联系起来。然而,以往在全球和区域范围内进行的最终结果建模主要基于八方向算法,而没有区分污染源。该算法无法描述通过地下管道和污水处理基础设施的点源排放的归宿路径,而且在考虑河流分叉造成的多方向路径方面表现不佳,尤其是在平坦地形中。在此,我们旨在通过纳入各种归宿路径和处理多向情景来改进归宿模型。我们还通过补充潜在的未处理点源排放(PSu)来更新 P 估算值。结果表明,PSu 对 FEP 的贡献(62.6%)大于对 P 排放的贡献(58.5%)。在改进了归宿模拟后,FEP 的空间分布更加广泛,有利于因地制宜地制定有针对性的监管策略。
期刊介绍:
Environmental Science & Technology (ES&T) is a co-sponsored academic and technical magazine by the Hubei Provincial Environmental Protection Bureau and the Hubei Provincial Academy of Environmental Sciences.
Environmental Science & Technology (ES&T) holds the status of Chinese core journals, scientific papers source journals of China, Chinese Science Citation Database source journals, and Chinese Academic Journal Comprehensive Evaluation Database source journals. This publication focuses on the academic field of environmental protection, featuring articles related to environmental protection and technical advancements.