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Flow Estimation from Flap‐Gate Monitoring
Author(s) -
Burrows R.,
Ockleston G. A.,
Ali K. H. M.
Publication year - 1997
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1997.tb00990.x
Subject(s) - outfall , gate valve , environmental science , range (aeronautics) , calibration , flow (mathematics) , storm , marine engineering , drag , combined sewer , hydrology (agriculture) , civil engineering , stormwater , engineering , meteorology , environmental engineering , geotechnical engineering , surface runoff , geography , mechanical engineering , statistics , mathematics , aerospace engineering , ecology , geometry , biology
The measurement of flows and recording of storm events at combined sewer overflows are a key requirement in effective urban pollution management. Staff of Thames Water Utilities have developed a low‐cost system based on monitoring the behaviour of flap valves on numerous major river outfalls. The paper presents the development of a modelling approach based on the principle of conservation of angular momentum and its application to experimental data for circular gates. Flow‐prediction accuracies, based on the measurement of gate inclination and water depths, in the range ± 20–30%, are found to be achievable for wider gate openings (<20°) – the recommended calibration offering conservative flow predictions at lower angles.