沉积物疏对分层水库中和释放的影响:对内部负载管理的影响
Yanjun Wu1, Hongwei Wang1, Zhu Bao2
1State Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 211135, China.
Journal of environmental management
|September 22, 2025
概括
沉积物疏有效地减少了深水生态系统的内部和负荷. 虽然最初的氨-释放可能会增加,但长期的好处包括显著的营养减少和生态系统恢复.
科学领域:
- 环境科学 环境科学
- 水生生态学 水生生态学
- 水资源管理 水资源管理
背景情况:
- 沉积物的内部营养物质负载是深水生态系统缩的关键因素.
- 沉积物疏作为内部营养物质负载的控制措施的有效性仍在调查中.
研究的目的:
- 评估沉积物疏对深水生态系统中内部 (N) 和 (P) 负载的影响.
- 为评估沉积物疏作为管理策略提供科学基础.
主要方法:
- 在一个季节性分层的水库中进行了现场疏模拟实验.
- 使用高分辨率Peeper (HR-Peeper) 和薄膜扩散梯度 (DGT) 技术来量化营养物流.
- 完整的沉积物核心被化,以监测营养度和微生物群落的变化.
主要成果:
- 沉积物中的总 (TN) 和总 (TP) 含量分别减少了约48.4%和50.1%.
- 氨- (NH4+-N) 流量最初在疏后增加,因为暴露在富含氨的层中,但在110天后正常化.
- 在疏后,溶性反应 (SRP) 流量显著减少 (p < 0.05),归因于减少的Fe-P和Org-P.
结论:
- 沉积物疏是一种可行的方法,用于控制深水生态系统中的内部N和P负载.
- 潜在的风险,如初始NH4+-N释放,需要仔细考虑和管理.
- 疏对沉积物营养含量产生积极影响,并减少P的调动,有助于生态系统的健康.
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