Print Email Facebook Twitter Combining a daily temperature pattern analysis and a heat-pulse system to estimate sediment depths in sewer systems Title Combining a daily temperature pattern analysis and a heat-pulse system to estimate sediment depths in sewer systems Author Regueiro-Picallo, Manuel (Universidade da Coruña) Langeveld, J.G. (TU Delft Sanitary Engineering) Wei, Haoyu (Luleå University of Technology) Bertrand-Krajewski, Jean Luc (Université de Lyon) Rieckermann, Jörg (Swiss Federal Institute of Aquatic Science and Technology) Date 2024 Abstract Sediments in urban drainage systems (UDS) significantly impact their operation, so effective strategies are required to reduce their negative effects. Monitoring sediment accumulation provides valuable insights into sediment characteristics, sediment transport dynamics, and system performance. However, the effectiveness of monitoring systems is limited due to cost constraints and installation challenges. This study describes the development and application of a new system based on temperature dynamics to measure sediment depths in sewer systems. The methodology involves the analysis of temperature time series under dry weather flow conditions to identify harmonic patterns between wastewater and sediment-bed temperatures. These patterns are increasingly attenuated by increasing sediment depth. This study combines a system called MONitoring Temperatures in SEdiments (MONTSE), which integrates a dual-probe heat-pulse (DPHP) method to characterize sediment thermal properties, and a surrogate model, which includes temperature pattern analysis, to estimate sediment depths. Likewise, laboratory-scale experiments were performed to validate the temperature monitoring system and the surrogate model performance. The maximum absolute errors in measured sediment depths were less than 22 mm, and the uncertainty of the system was estimated at ±7.3 mm. Groundbreaking measurements of thermal properties of UDS sediments were also reported. Reliable information on sediment depths and properties was provided, so the system could significantly optimize sewer system operation and cleaning strategies. To reference this document use: http://resolver.tudelft.nl/uuid:86c90010-0373-436b-b63d-643279511778 DOI https://doi.org/10.1039/d3ew00825h ISSN 2053-1400 Source Environmental Science: Water Research & Technology, 10 (4), 922-935 Part of collection Institutional Repository Document type journal article Rights © 2024 Manuel Regueiro-Picallo, J.G. Langeveld, Haoyu Wei, Jean Luc Bertrand-Krajewski, Jörg Rieckermann Files PDF d3ew00825h.pdf 2 MB Close viewer /islandora/object/uuid:86c90010-0373-436b-b63d-643279511778/datastream/OBJ/view