Flow rate influence on sediment depth estimation in sewers using temperature sensors.
annular flume
heat-transfer processes
sediment transport
temperature sensing
urban drainage systems
Journal
Water science and technology : a journal of the International Association on Water Pollution Research
ISSN: 0273-1223
Titre abrégé: Water Sci Technol
Pays: England
ID NLM: 9879497
Informations de publication
Date de publication:
Jun 2024
Jun 2024
Historique:
received:
29
05
2024
accepted:
30
05
2024
medline:
15
6
2024
pubmed:
15
6
2024
entrez:
15
6
2024
Statut:
ppublish
Résumé
Enhancing sediment accumulation monitoring techniques in sewers will enable a better understanding of the build-up processes to develop improved cleaning strategies. Thermal sensors provide a solution to sediment depth estimation by passively monitoring temperature fluctuations in the wastewater and sediment beds, which allows evaluation of the heat-transfer processes in sewer pipes. This study analyses the influence of the flow conditions on heat-transfer processes at the water-sediment interface during dry weather flow conditions. For this purpose, an experimental campaign was performed by establishing different flow, temperature patterns, and sediment depth conditions in an annular flume, which ensured steady flow and room-temperature conditions. Numerical simulations were also performed to assess the impact of flow conditions on the relationships between sediment depth and harmonic parameters derived from wastewater and sediment-bed temperature patterns. Results show that heat transfer between water and sediment occurred instantaneously for velocities greater than 0.1 m/s, and that sediment depth estimations using temperature-based systems were barely sensitive to velocities between 0.1 and 0.4 m/s. A depth estimation accuracy of ±7 mm was achieved. This confirms the ability of using temperature sensors to monitor sediment build-up in sewers under dry weather conditions, without the need for flow monitoring.
Identifiants
pubmed: 38877635
pii: wst_2024_193
doi: 10.2166/wst.2024.193
doi:
Substances chimiques
Sewage
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
3133-3146Informations de copyright
© 2024 The Authors This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits copying, adaptation and redistribution, provided the original work is properly cited (http://creativecommons.org/licenses/by/4.0/).
Déclaration de conflit d'intérêts
There are no conflicts of interest to declare.
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