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Article: Flume investigation of landslide debris-resisting baffles

TitleFlume investigation of landslide debris-resisting baffles
Authors
KeywordsFlume modelling
Baffles
Array configuration
Flow impedance
Landslide debris
Issue Date2014
Citation
Canadian Geotechnical Journal, 2014, v. 51, n. 5, p. 540-553 How to Cite?
AbstractLandslide debris is a common occurrence in mountainous regions around the world that can potentially result in disastrous consequences to downstream facilities. Flow-impeding structures are often constructed along the flow path to impede this hazardous phenomenon. Baffles are a type of flow-impeding structure regularly installed using empirical and prescriptive design methods as the interaction mechanism and the influence of baffle configuration on flow impedance is not well understood. A series of flume experiments were carried out to investigate flows characterizing landslide debris impacting an array of baffles using dry uniform sand. The influence of baffle height, row number, and spacing between successive rows was examined. Photoconductive sensors were used to estimate flow velocity, laser sensors were installed to measure flow depth profiles, and high-speed cameras were used to capture flow kinematics. Experimental results reveal that baffles can be categorized relative to the approach flow depth (h) and increasing the baffle height from 0.75h to 1.5h leads to a 40% increase in upstream flow depths from backwater effects, more effective development of subcritical conditions, and additional energy losses of up to 9%. Increasing the number of rows of 1.5h baffles from a single row to a three-row staggered array results in up to 72% additional energy loss. The energy loss is attributed to the deflection of granular jets and additional backwater effects. Increasing the row spacing from 50 to 100 mm results in up to a 14% increase in energy loss.
Persistent Identifierhttp://hdl.handle.net/10722/273664
ISSN
2023 Impact Factor: 3.0
2023 SCImago Journal Rankings: 1.513
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChoi, C. E.-
dc.contributor.authorNg, C. W.W.-
dc.contributor.authorSong, D.-
dc.contributor.authorKwan, J. H.S.-
dc.contributor.authorShiu, H. Y.K.-
dc.contributor.authorHo, K. K.S.-
dc.contributor.authorKoo, R. C.H.-
dc.date.accessioned2019-08-12T09:56:18Z-
dc.date.available2019-08-12T09:56:18Z-
dc.date.issued2014-
dc.identifier.citationCanadian Geotechnical Journal, 2014, v. 51, n. 5, p. 540-553-
dc.identifier.issn0008-3674-
dc.identifier.urihttp://hdl.handle.net/10722/273664-
dc.description.abstractLandslide debris is a common occurrence in mountainous regions around the world that can potentially result in disastrous consequences to downstream facilities. Flow-impeding structures are often constructed along the flow path to impede this hazardous phenomenon. Baffles are a type of flow-impeding structure regularly installed using empirical and prescriptive design methods as the interaction mechanism and the influence of baffle configuration on flow impedance is not well understood. A series of flume experiments were carried out to investigate flows characterizing landslide debris impacting an array of baffles using dry uniform sand. The influence of baffle height, row number, and spacing between successive rows was examined. Photoconductive sensors were used to estimate flow velocity, laser sensors were installed to measure flow depth profiles, and high-speed cameras were used to capture flow kinematics. Experimental results reveal that baffles can be categorized relative to the approach flow depth (h) and increasing the baffle height from 0.75h to 1.5h leads to a 40% increase in upstream flow depths from backwater effects, more effective development of subcritical conditions, and additional energy losses of up to 9%. Increasing the number of rows of 1.5h baffles from a single row to a three-row staggered array results in up to 72% additional energy loss. The energy loss is attributed to the deflection of granular jets and additional backwater effects. Increasing the row spacing from 50 to 100 mm results in up to a 14% increase in energy loss.-
dc.languageeng-
dc.relation.ispartofCanadian Geotechnical Journal-
dc.subjectFlume modelling-
dc.subjectBaffles-
dc.subjectArray configuration-
dc.subjectFlow impedance-
dc.subjectLandslide debris-
dc.titleFlume investigation of landslide debris-resisting baffles-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1139/cgj-2013-0115-
dc.identifier.scopuseid_2-s2.0-84899693280-
dc.identifier.volume51-
dc.identifier.issue5-
dc.identifier.spage540-
dc.identifier.epage553-
dc.identifier.eissn1208-6010-
dc.identifier.isiWOS:000335823100006-
dc.identifier.issnl0008-3674-

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