利用当地流体力学优势,发挥人工增氧功效,解决沿海缺氧问题

IF 11.3 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Qicheng Meng, Yiwen Pan, Jiliang Xuan, Feng Zhou, Wei Fan, Yanan Di, Zong-Pei Jiang, Canbo Xiao, Wenyan Zhang, Ute Daewel, Jianfang Chen, Daji Huang, Ying Chen
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引用次数: 0

摘要

本研究评估了人工增氧装置的部署策略,以缓解沿岸缺氧,特别是在海产养殖区。我们以中国沿海水域的一个典型海产养殖区为重点,考察了地形、水动力和生物地球 化学过程的综合影响。高分辨率三维物理-生物地球化学耦合模型与 2020 年三次夏季巡航的观测数据进行了验证,准确捕捉到了缺氧的关键驱动因素。结果表明,在特定地点持续的近海喷流驱动下,缺氧区呈现出不均匀的分布。在缺氧区上游近岸部署增氧装置可显著改善氧气输送,而且由于减少了施工和维护要求,成本效益更高。不确定性分析探讨了不同水质特性、氧气浓度、注入流速和生物地球化学含量的影响。不同的部署地点会产生不同的影响。特别是,浮力羽流会明显降低缺氧缓解的效果。人工充氧可能会导致意想不到的生态影响,包括增加营养释放和提高初级生产,从而延长缺氧的持续时间。此外,模拟结果表明,自然下沉流不足以将富含氧气的表层水输送到底部缺氧区。这些发现强调了全面部署前评估和提高充氧技术的重要性,以确保即时有效性和长期生态可持续性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Leveraging Artificial Oxygenation Efficacy for Coastal Hypoxia by Taking Advantage of Local Hydrodynamics

Leveraging Artificial Oxygenation Efficacy for Coastal Hypoxia by Taking Advantage of Local Hydrodynamics
This study evaluates deployment strategies for artificial oxygenation devices to mitigate coastal hypoxia, particularly in mariculture regions. Focusing on a typical mariculture region in the coastal waters of China, we examined the combined effects of topography, hydrodynamics, and biogeochemical processes. A high-resolution three-dimensional physical–biogeochemical coupled model, validated against observational data from three summer cruises in 2020, accurately captured key drivers of hypoxia. Results reveal that hypoxic zones exhibit an uneven distribution, driven by persistent offshore jets at specific locations. Nearshore deployment of oxygenation devices upstream of hypoxic zones significantly improves oxygen delivery and is more cost-efficient due to reduced construction and maintenance requirements. Uncertainty analysis explored the impacts of varying water mass properties, oxygen concentration, injection flow rates, and biogeochemical content. The influence varies depending on the deployment site. Particularly, buoyant plumes can notably reduce the effectiveness of hypoxia mitigation. Artificial oxygenation may lead to unintended ecological impacts, including increased nutrient release and enhanced primary production, which can prolong the duration of hypoxia. Furthermore, simulations indicate that natural downwelling currents are insufficient to transport oxygen-enriched surface water to the bottom hypoxic zones. These findings underscore the importance of comprehensive predeployment assessments and the advancement of oxygenation technologies to ensure both immediate effectiveness and long-term ecological sustainability.
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来源期刊
环境科学与技术
环境科学与技术 环境科学-工程:环境
CiteScore
17.50
自引率
9.60%
发文量
12359
审稿时长
2.8 months
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.
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