自组织地图的应用,稳定同位素与MixSIAR模型相结合,在一个受保护的水库中进行精确的控制
Changkun Lin1, Ronghua Du1, Fei Guo1
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Environmental research
|January 31, 2024
概括
污染在水库中是一个全球性的问题. 这项研究使用稳定的同位素和贝叶斯模型来追踪源,揭示了家庭污水和肥料是需要有针对性的管理的关键贡献者.
科学领域:
- 环境地质化学环境地质化学
- 欧洲化研究研究 欧洲化研究
- 水资源管理 水资源管理
背景情况:
- 污染和高化对水库构成全球环境风险.
- 即使在污染处理后,也会出现持续的藻类繁殖,这突显出需要更好地识别污染源.
- 缺乏关于源和命运的定量数据,阻碍了有效的生态管理.
研究的目的:
- 量化评估区域和季节性源和保护水库中的含量.
- 为有针对性的污染控制战略提供证据.
- 改善水库系统的长期生态安全管理.
主要方法:
- 综合区域测绘和稳定同位素分析 (δ18OH2O,δ15N酸盐,δ18O酸盐,δ13C-DIC).
- 应用贝叶斯同位素混合模型 (MixSIAR) 与NO3-/Cl-比相结合.
- 分析循环的区域和季节性变化.
主要成果:
- 化被确定为河流中主要的酸盐生产途径,在有限的地点观察到脱化.
- 在干旱季节,家用污水是主要的酸盐来源 (68.6%).
- 氨 (47.5%) 和碳化肥 (40.3%) 是雨季上游流域的主要来源,而下游的家用污水持续存在.
结论:
- 针对性的污水收集和处理对于下游地区至关重要,特别是在密集的住宅区.
- 非点源污染控制和废水处理厂升级对于上游地区至关重要.
- 结果提供精确的污染可追溯性,并为类似流域的次区域管理优先事项提供信息.
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