Endringer
On 19. februar 2026 kl. 09.43.50 UTC,
Michael van der Laan:
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Changed title to Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability (previously File C Users U22951718 Downloads Sancold2018 Smithfield Theronandbasson 20 1 Pdf)
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Moved Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability from organization Water Research Observatory to organization Stellenbosch University
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Updated description of Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability from
Auto-imported dataset for file-c-users-u22951718-downloads-sancold2018-smithfield-theronandbasson-20-1-pdf
toThis conference paper investigates reservoir sedimentation and downstream coastal impacts associated with the proposed Smithfield Dam on the uMkhomazi River, KwaZulu‑Natal, South Africa. A review of regional sediment yields was conducted and combined with 2‑dimensional hydrodynamic modelling to simulate reservoir sedimentation over a 100‑year period, indicating potential storage capacity losses of 36–66% depending on future sediment yield scenarios. A 1‑dimensional hydrodynamic and sediment transport model was applied to assess pre‑ and post‑dam sediment routing from the dam site to the river mouth. Results show that the dam would trap nearly all coarse sediment, leading to a long‑term reduction of approximately 74 000 t/a (≈21%) in sand delivery to the coast. This reduction corresponds to a 10% decrease in total longshore sediment supply at Durban, with implications for coastal sediment budgets and shoreline stability north of the uMkhomazi River mouth. The study further evaluates cumulative impacts of existing sand mining, showing that dam sediment trapping and sand mining would together reduce fluvial sand supply by up to 37%. Potential mitigation measures include sediment bypass tunnels, improved sand‑mining regulation, catchment management, and targeted beach nourishment. The findings highlight the importance of integrated river–coast sediment management in future dam planning.
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toagriculture
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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keywords
toreservoir sedimentation, Smithfield Dam, uMkhomazi River, sediment yield, coastal sediment budget, shoreline stability, dam impacts, hydrodynamic modelling, sediment transport, sand mining, coastal erosion, KwaZulu‑Natal
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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tosemi-structured
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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publisher
toSouth African National Committee on Large Dams (SANCOLD) – Conference proceedings
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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toStellenbosch University
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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authors
to[{'author_department': 'Institute for Water and Environmental Engineering, Department of Civil Engineering', 'author_email': 'atheron1@csir.co.za', 'author_name': 'Andre K.', 'author_organization': 'Stellenbosch University', 'author_surname': 'Theron', 'contact_same_as_author': 'True'}, {'author_department': 'Institute for Water and Environmental Engineering, Department of Civil Engineering', 'author_email': '', 'author_name': 'Gerrit R.', 'author_organization': 'Stellenbosch University', 'author_surname': 'Basson'}]
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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to2018-11-01
in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability -
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toboth
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Uploaded a new file to resource sancold2018_smithfield_theronandbasson_1_id_06bc6b54-6c17-4e92-9b08-ee295c89a6dd.pdf in Reservoir Sedimentation and Potential Impact of the Proposed Smithfield Dam on the uMkhomazi River on the Coastal Sediment Budget and Shoreline Stability