高频DOC代理传感器对泥炭地溪流和水文连续流域的评估
Hannah Thompson1, Joerg Arnscheidt1, Hugo McGrogan1
1School of Geography and Environmental Sciences, Ulster University, Coleraine, BT52 1SA, UK.
Journal of environmental management
|November 13, 2025
概括
吸收传感器准确地测量了泥炭地中的河流溶解有机碳 (DOC),与光传感器不同,这些传感器在高DOC度和湿化方面扎. 这一发现对于在这些环境中可靠地估计碳负载至关重要.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 生物地质化学生物地质化学
背景情况:
- 精确量化河流溶解有机碳 (DOC) 对于碳负载估计至关重要.
- 在低频率的实验室测量可以产生不可靠的DOC估计.
- 高频DOC代理传感器 (光,吸收) 是一个潜在的解决方案,但需要在不同的环境中进行验证.
研究的目的:
- 评估光和吸收传感器对于高频DOC监测在高地泥炭地环境中的适用性.
- 为了评估传感器在不同的环境梯度和水文连续的性能.
- 确定影响高DOC水域传感器精度的因素.
主要方法:
- 在11个地点部署光和吸收传感器,从一级流到126平方公里的流域,超过7个活动 (2023年8月至2024年8月).
- 在不同的流量条件下,沿着环境梯度和水文连续线测量了DOC度.
- 进行了后期实验,以确定传感器信号干扰的原因,包括化水平 (E4:E6比率).
主要成果:
- 基于吸收的传感器证明了在整个水文连续和各种流量条件下与DOC度的线性关系.
- 基于光的传感器在高地地区显示信号问题,DOC>~15毫克L-1,特别是在高流量事件期间.
- 光传感器中的信号灭与增加的水化有关,由E4:E6比率 (r = 0.282,p = 0.024) 证实.
结论:
- 建议采用基于吸收的传感器,而不是基于光的传感器,用于高频DOC监测,用于高DOC度 (>15 mg L-1) 的泥炭地河流系统.
- 吸收传感器在不同的河流环境和流量条件中提供了更高的可靠性和可转移性.
- 未来的研究应该在选择代理传感器时考虑湿度水平,以便在泥炭丰富的水域中监测DOC.
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