Lock

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Large sea lock in the port of Emden
Lock lock between two port basins in Hamburg (the gates don't close completely)

The term lock sluice , also protective sluice , describes a chamber sluice that is intended to shut off or protect a port or a body of water with a certain water level (inland water level) against temporarily higher outside water levels. When the inland and outside water levels are reflected, the lock function is not applicable and the gates are open. The lock sluice is used in the tidal area at seaports and at the confluences of shipping canals in rivers with expected floods. The lock sluice is almost always integrated into dykes and dams and thus guarantees flood protection in the hinterland areas that are often deeper.

Examples

Lock sluice on the Dessel – Turnhout – Schoten Canal near Ravels (Belgium)
Briare canal bridge with closed locks

The large sea lock of the port of Emden with two sliding gates that seal on both sides. An example of its use on inland waterways is the Hanekenfähr lock on the Dortmund-Ems Canal (DEK-km 140.68) near Lingen - Hanekenfähr with two swing gates that can also be used individually as flood lock gates. Here the DEK uses a short stretch of the Ems; In order to protect the subsequent canal from flooding of the Ems and thus to ensure the passage height under bridges in the canal, the lock sluice comes into action. The Dörpen lock can perform the same function during extreme Ems floods to protect the coastal canal . The Niegripp lock with lifting gates that seal on both sides can also perform this function in the event of extreme flooding of the Elbe to protect the Elbe-Havel Canal and the locations on the canal.

The term has a different meaning in the case of locks, the two ends of which are connected by a longer waterway and cannot have different water levels. This lock sluice cannot create a height difference, but prevents an undesirable flow of water. The Rugenberger Schleuse in the Port of Hamburg prevents the water from the Süderelbe from flowing through the Waltershofhafen, but provides this short travel option for ships.

The task of the two lock sluices on the Dessel – Turnhout – Schoten Canal in Belgium, which connects the Maas-Scheldt Canal with the Albert Canal , is to keep the water flowing by closing the gates in the event of a dike breach. The trough of the canal bridge Briare along the Canal latéral à la Loire (France) can be drained for maintenance work by means of two lock sluices.

literature

  • Hans-Georg Braun; Martin Eckoldt: Rivers and canals, The history of the German waterways , DSV-Verlag, Hamburg 1998 OCLC 833409480

Web links

Individual evidence

  1. ^ Definition in Lueger, Otto: Lexicon of the entire technology and its auxiliary sciences, Vol. 7 Stuttgart, Leipzig 1909, p. 835
  2. ↑ H.-J. Uhlemann: Berlin and the Märkische Wasserstraßen , DSV-Verlag, Hamburg 1994, p. 185 ISBN 3-344-00115-9