在平原河流网络流域中,气损失,河流运输,湖泊积累和水质特性之间的联系
Zihan Zhao1, Yan Chen1, Chun Ye2
1School of Geography, Nanjing Normal University, Nanjing 210023, China.
Journal of environmental sciences (China)
|July 2, 2025
概括
在长江三角洲的人类活动增加了太湖的 (N) 污染,加速了缩. 为了生态系统健康和流域管理,每年将人为产生的N减少66.28 Gg至关重要.
科学领域:
- 环境科学 环境科学
- 欧洲化研究研究 欧洲化研究
- 水质管理水质管理
背景情况:
- 太湖湖是一个浅层的环保湖,由于长江三角洲的人类活动造成的过度 (N) 负荷,它面临严重的蓝藻细菌繁殖.
- 了解复杂的循环及其对湖泊生态系统的影响,对于有效的环境管理至关重要.
研究的目的:
- 为了确定盆地中 (N) 损失和太湖的生态反应之间的合关系.
- 分析流的时空动态及其对湖泊缩的影响.
- 为减轻污染提供精细的流域规模管理策略.
主要方法:
- (N) 流量分析和外源营养负载评估的整合.
- 基于N负载趋势的湖泊生态系统演变阶段的分类 (A阶段:1980-1997年,B阶段:1998-2006年,C阶段:2007年至今).
- 环境因素 (例如,建地扩张,气候变化,社会经济发展) 与N排放和水文条件的相关性分析.
主要成果:
- 在N输入中存在显著的时空变化,其中大支流贡献了大部分.
- (N) 负载动态显示了三个不同的阶段,最近负载下降,但水流量增加.
- 建筑土地扩张 (8.21%至21.04%) 和气候变化 (r=0.945) 显著影响水文,而社会经济发展推动了污水排放 (r=0.857).
- 表面沉积物N的积累率在3.29到10.77gN/年之间.
- 为了达到污染物控制目标,上游地区每年需要减少66.28 Gg的人为.
结论:
- 盆地的 (N) 输入和损失因人类活动而加剧,需要严格控制.
- 太湖的生态系统直接对外源性N输入作出反应,沉积物中的N积累很大.
- 以N流量分析为基础的有效的流域管理对于减轻生态损害和控制高化至关重要.
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