Schilperoort R P S, Clemens F H L R
Department of Watermanagement, Faculty of Civil Engineering, Delft University of Technology, P.O. Box 5048, 2600, GA, Delft, The Netherlands.
Water Sci Technol. 2009;60(5):1127-34. doi: 10.2166/wst.2009.467.
This paper introduces the application of fibre-optic distributed temperature sensing (DTS) in combined sewer systems. The DTS-technique uses a fibre-optic cable that is inserted into a combined sewer system in combination with a laser instrument that performs measurements and logs the data. The DTS-technique allows monitoring in-sewer temperatures with dense spatial and temporal resolutions. The installation of a fibre-optic cable in a combined sewer system has proven feasible. The use of a single instrument in an easy accessible and safe location that can simultaneously monitor up to several hundreds of monitoring locations makes the DTS set-up easy in use and nearly free of maintenance. Temperature data from a one-week monitoring campaign in an 1,850 m combined sewer system shows the level of detail with which in-sewer processes that affect wastewater temperatures can be studied. Individual discharges from house-connections can be tracked in time and space. With a dedicated cable configuration the confluence of wastewater flows can be observed with a potential to derive the relative contributions of contributary flows to a total flow. Also, the inflow and in-sewer propagation of stormwater can be monitored.
本文介绍了光纤分布式温度传感（DTS）在合流制排水系统中的应用。DTS技术使用一根插入合流制排水系统的光纤电缆，结合一台进行测量并记录数据的激光仪器。DTS技术能够以密集的空间和时间分辨率监测下水道内的温度。在合流制排水系统中安装光纤电缆已被证明是可行的。在易于到达且安全的位置使用单一仪器，可同时监测多达数百个监测点，这使得DTS装置使用方便且几乎无需维护。在一个1850米长的合流制排水系统中进行的为期一周的监测活动所获得的温度数据，显示了研究影响废水温度的下水道内过程时所能达到的详细程度。来自房屋连接管的单独排放可以在时间和空间上进行追踪。通过专门的电缆配置，可以观察废水流的汇合情况，并有可能得出支流对总流量的相对贡献。此外，还可以监测雨水的流入和在下水道中的传播情况。
