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在干旱和半干旱地区使用贝叶斯模型和灰色影响分析识别封闭湖盆的DOM源
Shixiang Zhang1, Qingqian Li1, Dongping Liu2
1Key Laboratory of Estuarine and Coastal Environment of the Ministry of Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China.
在封闭的湖泊中识别溶解有机物 (DOM) 的来源对于水质至关重要. 这项研究使用光EMS,PARAFAC和GINA来追踪中国沙湖的DOM起源,揭示了湿地和河流输入.
科学领域:
- 环境化学环境化学
- 分析水质 分析水质
- 临界技术 临界技术
背景情况:
- 干旱地区的封闭湖泊在追踪水污染源方面面临着挑战.
- 识别溶解有机物 (DOM) 的来源对于了解水质动态至关重要.
- 之前的研究强调了需要强大的方法来追踪DOM在湖泊系统.
研究的目的:
- 确定和量化沙湖中溶解有机物 (DOM) 的来源,这是一个封闭的湖泊系统.
- 为了评估光EEMs与PARAFAC和GINA结合用于DOM源分配的有效性.
- 建立一个强大的分析框架,用于追踪水文封闭盆地的污染源.
主要方法:
- 使用光激发发射矩阵 (EEM) 谱法分析DOM.
- 使用并行因子分析 (PARAFAC) 来提取特征性的光成分 (C1-C5).
- 灰色影响分析 (GINA) 确定了终端组合分析 (EMMA) 的关键参数,包括BIX,HIX,β:α和T/F比率.
主要成果:
- 确定了五种DOM成分:托类 (TRLF),微生物代谢物 (MM) 和富尔维类 (FLF).
- 与邻近的水体相比,沙湖的总光强度较低.
- 最终成员混合物分析 (EMMA) 表明,DOM主要来自湿地 (34.6%) 和Diannong河 (28.1%).
结论:
- 通过EEMs-PARAFAC-GINA-EMMA的综合方法,他们有效地追踪了沙湖的DOM源.
- 湿地和Diannong河是沙湖DOM的重要贡献者,表明活跃的水交换.
- 该方法提供了一个可靠的框架,用于量化封闭湖泊系统中的污染源贡献.
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