Investigation of Hydraulic Stability of Boulder Weir
dc.contributor.author
Acharya, Prajwol
dc.contributor.author
Singh, Umesh
dc.contributor.author
Ban, Jeevan Kumar
dc.contributor.author
Bhattarai, Pawan Kumar
dc.contributor.author
Bishwakarma, Meg Bahadur
dc.contributor.editor
Boes, Robert
dc.contributor.editor
Albayrak, Ismail
dc.contributor.editor
Felder, Stefan
dc.contributor.editor
Crookston, Brian
dc.contributor.editor
Heller, Valentin
dc.date.accessioned
2024-06-19T12:59:25Z
dc.date.available
2024-05-31T14:42:55Z
dc.date.available
2024-06-05T05:38:54Z
dc.date.available
2024-06-12T05:16:38Z
dc.date.available
2024-06-19T06:43:59Z
dc.date.available
2024-06-19T12:59:25Z
dc.date.issued
2024
dc.identifier.uri
http://hdl.handle.net/20.500.11850/675981
dc.identifier.doi
10.3929/ethz-b-000675981
dc.description.abstract
The Himalayan Rivers are steep and are characterized by highly turbulent flow transporting a lot of bedload and boulders during floods. Conventional concrete diversion structures face continuous damage from rolling boulders, necessitating frequent repair. The risk of hydro-geomorphic disaster is increasing in the Himalayan region due to climate change effects. Boulder weirs, constructed from riverine boulders, emerge as a cost-effective and disaster-resilient alternative for small to medium hydropower projects. Boulders, abundant in Himalayan riverbeds, offer superior resistance to abrasion compared to concrete, and in case of damage, swift rehabilitation can be achieved using the riverbed materials. In Nepal, the Khimti-I Hydropower Plant pioneered the boulder weir as a diversion structure, demonstrating over two decades of successful operation with minimal maintenance. Design of the weir, including boulder stability were determined by physical model testing. Many hydropower projects have adopted the boulder weir design, relying on empirical experience from Khimti-I. Guidelines for design are available for rock ripraps using crushed stones and dumped rounded stones, and, packed angular stones in embankment dam overtopping situations. However, boulder weirs are constructed by packing boulders having smoother surface, in a single layer. So, this study employs flume experiments to investigate hydraulic stability criteria for boulder weirs, considering variations in downstream slope ranging from 12.5% to 25% and stone diameters of 30 mm, 35 mm, 40 mm and 50 mm. A relationship between the stone-related Froude number and downstream weir slope was established which can be potentially used to design boulder sizes for a given flood discharge and downstream slope of a weir
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
ETH Zurich
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
boulder weir
en_US
dc.subject
riprap
en_US
dc.subject
physical modelling
en_US
dc.subject
diversion structure
en_US
dc.subject
disaster resilience
en_US
dc.title
Investigation of Hydraulic Stability of Boulder Weir
en_US
dc.type
Conference Paper
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2024-06-17
ethz.book.title
Proceedings of the 10th International Symposium on Hydraulic Structures (ISHS 2024)
en_US
ethz.pages.start
365
en_US
ethz.pages.end
373
en_US
ethz.event
10th International Symposium on Hydraulic Structures (ISHS 2024)
en_US
ethz.event.location
Zurich, Switzerland
en_US
ethz.event.date
June 17-19, 2024
en_US
ethz.publication.place
Zurich
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::03820 - Boes, Robert / Boes, Robert
ethz.relation.isPartOf
10.3929/ethz-b-000675921
ethz.date.deposited
2024-05-31T14:42:56Z
ethz.source
BATCH
ethz.eth
no
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2024-06-19T12:59:28Z
ethz.rosetta.lastUpdated
2024-06-19T12:59:28Z
ethz.rosetta.versionExported
true
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