采样频率和流量对亚热带河流中营养源分配的影响
Yajing Sheng1, Wei Gao2, Min Cao1
1Guangdong Basic Research Center of Excellence for Ecological Security and Green Development, School of Ecology, Environment and Resources, Guangdong University of Technology, Guangzhou, China.
概括
非点源是珍珠河流域营养污染的主要原因,强调了有针对性的管理的必要性. 高频监测对于准确识别污染源至关重要.
科学领域:
- 环境科学 环境科学
- 水资源管理 水资源管理
- 生态生态学 生态生态学
背景情况:
- 准确的营养负载估计对于污染控制至关重要,但由于数据限制和水文变异性而受到挑战.
- 区分点源和非点源污染对于有效的流域管理至关重要.
研究的目的:
- 量化区分点源与非点源对珍珠河流域 (PRB) 总 (TN) 和总 (TP) 负载的贡献.
- 评估监测频率和流量变化对营养源分配精度的影响.
主要方法:
- 使用基于过程的负载分配模型 (LAM),整合来自41个监测站的每日流量和高分辨率水质数据.
- 采用统计T测试来评估源分配对监测频率和流量变化的敏感性.
主要成果:
- 非点源占PRB年度TN (85.95%) 和TP (92.13%) 负载的大部分.
- 观察到显著的区域差异,比江子盆地显示较低的非点源TN贡献.
- 监控频率对TN源分区的影响比TP更大.
结论:
- 非点源是PRB中占主导地位的营养贡献者,需要特定区域的管理策略.
- 高频监测和多源数据融合对于可靠的污染源识别和有效的水质管理至关重要.
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