https://www.iahrmedialibrary.net/the-library/applied-hydraulics/hydraulic-structures/roman-dropshaft-in-operation-2/980
Roman dropshaft in operation (2) | IAHR Media Library
Roman dropshaft in operation: Recret model (Aug. 1998) Regime R2: high risks of erosion and damage at the intake of downstream conduit (photo dc/h =
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