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Streambed instabilities around a bridge pier in a dredged channel
Author(s) -
Lade Abhijit D.,
Kumar Bimlesh
Publication year - 2020
Publication title -
river research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.679
H-Index - 94
eISSN - 1535-1467
pISSN - 1535-1459
DOI - 10.1002/rra.3629
Subject(s) - pier , flume , dredging , geology , geotechnical engineering , channel (broadcasting) , instability , flow (mathematics) , engineering , geometry , mechanics , structural engineering , mathematics , oceanography , electrical engineering , physics
We conducted flume experiments to study the morphological behaviour around a circular pier located downstream of a mining pit. Severe transverse erosion at the pier base as well as lowering of channel bed upstream of the pier was observed because of channel dredging. Streambed instability was analysed based on two non‐dimensional parameters, namely, pier exposure factor and normalized upstream incision depth. The maximum values of both these parameters were observed when the mining pit was dredged closest to the pier. We also observed growth in streambed instability with an increase in flow Reynolds number.