Royal HaskoningDHV, PO Box 151, NL-6500 AD, Nijmegen, The Netherlands E-mail:
Water Sci Technol. 2013;68(8):1723-30. doi: 10.2166/wst.2013.419.
A major drawback of separate sewer systems is the occurrence of illicit connections: unintended sewer cross-connections that connect foul water outlets from residential or industrial premises to the storm water system and/or storm water outlets to the foul sewer system. The amount of unwanted storm water in foul sewer systems can be significant, resulting in a number of detrimental effects on the performance of the wastewater system. Efficient removal of storm water inflows into foul sewers requires knowledge of the exact locations of the inflows. This paper presents the use of distributed temperature sensing (DTS) monitoring data to localize illicit storm water inflows into foul sewer systems. Data results from two monitoring campaigns in foul sewer systems in the Netherlands and Germany are presented. For both areas a number of storm water inflow locations can be derived from the data. Storm water inflow can only be detected as long as the temperature of this inflow differs from the in-sewer temperatures prior to the event. Also, the in-sewer propagation of storm and wastewater can be monitored, enabling a detailed view on advection.
不期望的下水道交叉连接，将住宅或工业场所的污水出口连接到雨水系统和/或雨水出口连接到污水下水道系统。污水下水道系统中不需要的雨水量可能很大，对废水系统的性能产生许多不利影响。有效地将雨水流入污水下水道系统中去除需要了解流入的确切位置。本文提出了使用分布式温度感应（DTS）监测数据来定位污水下水道系统中的非法雨水流入。本文展示了来自荷兰和德国的两个污水下水道系统监测活动的数据结果。对于这两个地区，都可以从数据中得出一些雨水流入位置。只有在雨水流入的温度与事件发生前的下水道内温度不同时，才能检测到雨水流入。此外，还可以监测雨水和废水在下水道中的传播，从而可以详细了解对流。
