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在多源污染下水和沉积物质量的时空动态:中国金京流域的案例研究

Lingling Tong^1,2,3, Feng Liu³, Fatimah Md Yusoff^2,4

¹Department of Primary Education, Changsha Normal University, Changsha, Hunan, China.

|November 13, 2025

概括

农业排水严重影响河流水质,特别是在雨季. 管理农田河流中的营养负载对于水生生态系统的健康和金京盆地的可持续水资源至关重要.

科学领域:

环境科学环境科学
生态生态学生态生态学
水资源管理水资源管理

背景情况:

河流的物理化学性质对于水生生态系统的健康至关重要.
了解空间和季节性水质变化是有效管理的关键.
不同的土地用途 (农田,森林,住宅) 不同地影响河流环境.

研究的目的:

调查河水和沉积物中的水质的空间和季节性变化.
为了比较跨河流的水质与金京盆地的不同污染源.
确定水质变化的主要驱动因素.

主要方法:

在五条代表不同土地用途的河流 (TR,TRS,GR,GRS,JR) 进行采样.
在潮湿和干燥季节进行收集,以捕捉季节动态.
使用多变量统计方法进行分析,包括主要组件分析 (PCA).

主要成果:

农田占主导地位的河流 (TR,TRS) 的营养,土壤有机物 (SOM) 和溶解有机碳 (DOC) 含量最高.
森林河流 (GR,GRS) 的营养度最低.
湿季增加了水相营养和沉积相NH4+-N和SOM;干季出现了更高的pH和水中的溶氧,以及沉积物中的pH和DOC升高.
PCA证实农业排水是雨季营养污染的主要驱动因素.

结论:

农业排水造成的营养污染是一个主要问题,特别是在农田地区.
季节性变化显著影响水和沉积物质量参数.
有效的水资源管理需要解决水和沉积物阶段的营养负载.

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