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Hydraulics and Environment Department Hydraulics and Environment Department

Studies - Lisbon General Drainage Plan - Hydraulic tests in a physical model of the vortex chamber of Avenida Almirante Reis

If not properly addressed, urban floods will become more frequent as a result of the increased urbanization and due to the effects of the climate change. Therefore, the Lisbon City Council developed the General Drainage Plan (PGDL) with the main objective of reducing the impact of urban floods in the city. The plan comprises the construction of two deep tunnels that will capture the flow collected at the surface. For the connection between the drainage network and the tunnels, three vortex dropshafts will be constructed.

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