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Updated: Jul 25, 2025

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在长江河下游的营养度和流量最近的下降

Yao Wang¹, Lei Gao¹, Yue Ming¹

¹State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241 China.

Estuaries and coasts : journal of the Estuarine Research Federation

|June 26, 2023

概括

长江河的营养水平在2012年之后由于肥料控制而大幅下降,扭转了长期的恶化. 河流排放对日常和季节性营养模式产生强烈影响.

科学领域:

环境科学环境科学
水质监测水质监测
河流的营养动力学

背景情况:

营养污染是大型河流系统的一个主要问题,受到人类活动和气候变化的影响.
长江 (长江) 河近几十年来经历了重大的环境变化.
了解营养变异对于管理水生生态系统至关重要.

研究的目的:

调查下长江河的营养变化模式和趋势.
评估人类活动和气候变化对河流营养度的综合影响.
识别营养趋势的转折点及其驱动因素.

主要方法:

从2016年11月到2020年8月,每月对营养素 (酸盐,酸盐,酸盐,酸盐) 进行监测.
在2020年7月发生的极端洪水事件期间,每日监测.
整合当前数据与跨越近几十年的历史数据.
对中国东部和南方八条河流的营养产量进行比较分析.

主要成果:

河流排水是影响营养度在日常和季节性尺度上的主要因素.
营养度趋势的转折点 (NO₃^-,PO₄^3-,NH₄⁺,SiO₃^2-) 出现在2010年代.
在转折点之后,NO-度,SiO2-度和PO3-度显著下降.
从20世纪60年代到2012年,营养物质度和流量的增加与肥料使用有关.
2012年以后的下降趋势归因于肥料使用控制.
盆地度是决定营养产量的关键因素,受温度,降水和人口密度的影响.

结论:

从20世纪60年代到2010年,江河水生环境的恶化在2010年代已成功逆转.
有效控制和肥的使用是改善水质的主要驱动力.
与度相关的因素在区域营养流量变化中起着重要作用.

关键词:

长江 (长江) 河 (长江) 河流十年趋势的趋势免责令的使用情况.营养素营养素营养素季节性变化季节性变化

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