Liu Shuming, Che Han, Smith Kate, Chen Lei
School of Environment, Tsinghua University, Beijing 100084, China.
Environ Sci Process Impacts. 2014 Aug;16(8):2028-38. doi: 10.1039/c4em00188e.
Early warning systems are often used to detect deliberate and accidental contamination events in a water system. Conventional methods normally detect a contamination event by comparing the predicted and observed water quality values from one sensor. This paper proposes a new method for event detection by exploring the correlative relationships between multiple types of conventional water quality sensors. The performance of the proposed method was evaluated using data from contaminant injection experiments in a laboratory. Results from these experiments demonstrated the correlative responses of multiple types of sensors. It was observed that the proposed method could detect a contamination event 9 minutes after the introduction of lead nitrate solution with a concentration of 0.01 mg L(-1). The proposed method employs three parameters. Their impact on the detection performance was also analyzed. The initial analysis showed that the correlative response is contaminant-specific, which implies that it can be utilized not only for contamination detection, but also for contaminant identification.
早期预警系统常用于检测水系统中的蓄意和意外污染事件。传统方法通常通过比较来自一个传感器的预测水质值和观测水质值来检测污染事件。本文提出了一种通过探索多种传统水质传感器之间的相关关系进行事件检测的新方法。使用实验室污染物注入实验的数据对所提方法的性能进行了评估。这些实验结果证明了多种类型传感器的相关响应。观察到所提方法在引入浓度为0.01 mg L(-1)的硝酸铅溶液9分钟后能够检测到污染事件。所提方法采用了三个参数。还分析了它们对检测性能的影响。初步分析表明相关响应具有污染物特异性，这意味着它不仅可用于污染检测，还可用于污染物识别。
