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在中国的三峡水库中,沉积大量埋葬了比或更多的碳

Jinlin Li¹, Xiubin He², Jie Wei³

¹State Key Laboratory of Lake and Watershed Science for Water Security, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, China; Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610213, China.

Environmental research

|August 2, 2025

概括

三峡水库 (TGR) 从2003年到2023年埋下了大约206亿沉积物. 这种沉捕获了大量的总有机碳 (TOC),总 (TN) 和总 (TP),影响了水库生态.

科学领域:

环境科学环境科学
地质化学地质化学
水文学的水文学

背景情况:

水库沉积,特别是营养堆积 (总有机碳,总,总),威胁到生态稳定和可持续运行.
三峡水库 (TGR),一个主要的中国河流型水库,经历了显著的沉积,但埋藏的营养素的数量仍然没有量化.
了解营养埋葬对于评估大规模水库运营对生态的影响至关重要.

研究的目的:

从2003年到2023年,量化三峡水库 (TGR) 的总沉积量.
为了确定在TGR沉积物中埋藏的总有机碳 (TOC),总 (TN) 和总 (TP) 的数量.
分析TGR沉积物中的营养物质的空间和时间分布.

主要方法:

从2003-2023年收集TGR入口和出口的每月悬浮沉积物负载,以估计总沉积量.
取样了悬浮沉积物,河床表面沉积物和沉积物核心,用于物理化学性质分析.
确定营养度 (TOC,TN,TP) 和分析的沉积物特性.

主要成果:

在2003-2023年期间,TGR总沉积量估计约为2.06亿 (Bt),其中90.78%发生在雨季.
与雨季相比,悬浮沉积物中的营养度在干季更高.
估计在TGR中埋藏的沉积物营养:3511万TOC,214万TN和195万TP.
沉积物核心揭示了季节性分层;核心配置中的营养度低于悬浮沉积物.

结论:

在TGR的沉积埋葬了大量的TOC,TN和TP,含有不成比例的高碳量.
季节性变化显著影响水库内的沉积物和营养物质沉积模式.
持续监测和战略管理至关重要,以减轻在TGR埋葬营养物的生态影响.

关键词:

季节性差异化季节性差异化沉积物营养素沉积物营养素沉积沉积沉积沉积沉积空间分布的空间分布三峡水库是三个峡谷的水库.

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