A robust and accurate surrogate method for monitoring the frequency and duration of combined sewer overflows
| Autor: | Lluís Corominas, Valentin Gamerith, Albert Montserrat, Guenter Gruber, Thomas Franz Hofer, Dirk Muschalla |
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| Rok vydání: | 2018 |
| Předmět: |
Monitoring
0208 environmental biotechnology Real-time computing Untreated wastewater 02 engineering and technology Wastewater 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Article Two temperature Water Movements Low-cost Flow sensor Duration (project management) 0105 earth and related environmental sciences General Environmental Science Sewage Combined sewer overflow Drainage Sanitary Temperature Response time General Medicine Models Theoretical Pollution 6. Clean water 020801 environmental engineering Austria Surrogate measurement Environmental science Combined sewer Event detection Test phase Algorithms Environmental Monitoring Field conditions |
| Zdroj: | Environmental Monitoring and Assessment |
| ISSN: | 1573-2959 0167-6369 |
| DOI: | 10.1007/s10661-018-6589-3 |
| Popis: | Discharges of untreated wastewater from combined sewer overflows (CSOs) can affect hydraulic stress and have significant environmental impacts on receiving water bodies. Common flow rate and water level sensors for monitoring of CSO events are expensive in terms of investment costs, installation, operation and maintenance. This paper presents a novel surrogate method to detect CSO events by using two low-cost temperature sensors. The novelty is the experimental setup for installation of temperature sensors in CSO structures and an algorithm developed to automatically calculate the duration of CSO events considering the response time of the system. The occurrence and duration of CSO events is computed based on the convergence of the two temperature signals. The method was tested under field conditions in a CSO structure, and the results were compared to the information gathered from a parallel installed flow sensor. The application of two temperature sensors installed inside a CSO structure was proven to be robust and accurate for the automatic detection of the occurrence and duration of CSO events. Within the 7-month test phase, 100% of the 20 CSO events could be detected without false detections. The accuracy of detecting the start and end of the CSO events was 2 min in comparison to the flow sensor. Electronic supplementary material The online version of this article (10.1007/s10661-018-6589-3) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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