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沉积物疏后内部营养物质的释放模式是由微粒沉积在有机湖中的颗粒沉积驱动的

Chunhui Yang¹, Man Zhang², Chengcheng Zhang³

¹School of Environment, Nanjing Normal University, Nanjing 210023, PR China; State Key Laboratory of Lake and Watershed Science for Water Security, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 211135, PR China.

|November 4, 2025

概括

湖泊中的颗粒物 (PP) 恶化了疏后的营养释放. 较高的PP含量和有机物含量加快了 (N) 和 (P) 的释放,影响了疏效率,特别是在N管理方面.

科学领域:

环境科学环境科学
临界技术临界技术
生态系统恢复恢复生态系统

背景情况:

在化的湖泊中持续沉积颗粒颗粒 (PP) 加快了疏后的营养释放.
这破坏了整治工作的长期有效性.
缺乏关于PP数量和成分对疏的影响的定量研究.

研究的目的:

量化不同颗粒颗粒 (PP) 沉积量和有机物 (OM) 含量对疏效率的影响.
要了解PP对 (N) 和 (P) 释放动态的影响,在疏后释放动态.
为了确定PP沉积在疏区的风险值.

主要方法:

实验室模拟PP沉积的控制厚度和OM含量.
在沉积物-水界面 (SWI) 上量化孔水营养度和流量.
统计分析,包括双向ANOVA,以确定剂量依赖的效应和意义.

主要成果:

增加的PP数量和OM含量显著提高了孔水N和P度和流量.
沉积物N和P含量在PP负载较高时显著下降 (p < 0.001).
疏对N管理的有效性显示了加速的损失,PP数量具有剂量依赖的影响.
P释放表现出延迟的模式,取决于SWI的氧气水平.
确定了PP沉积的风险值 (≥8毫米厚度和≥3.3%的TOC).

结论:

优先考虑抑制释放对于可持续的疏管理至关重要.
由于高的PP负载和OM含量,疏效率受到显著影响.
在每年大量的PP沉积和OM丰富的地区进行疏操作之前,建议谨慎评估.

关键词:

dragage 疏疏疏是一个欧洲化是什么意思?微粒颗粒颗粒颗粒颗粒的颗粒.沉积物释放的营养物质是沉积物中的营养物质.

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