Delta Works in the context of "Floodgate"

The Rhine–Meuse–Scheldt delta is a river delta in the Netherlands formed by the confluence of the Rhine, the Meuse (Dutch: Maas) and the Scheldt rivers. In some cases, the Scheldt delta is considered a separate delta to the Rhine–Meuse delta. The result is a multitude of islands, branches and branch names, in which a waterway that appears to be one continuous stream may have numerous separate names for different sections, e.g. Rhine → Bijlands Kanaal → Pannerdens Kanaal → Nederrijn → Lek → Nieuwe Maas → Het Scheur → Nieuwe Waterweg. Since the Rhine contributes most of the water, the term "Rhine Delta" is commonly used, although this name is also used for the delta where the Alpine Rhine flows into Lake Constance. By some calculations, the Rhine–Meuse–Scheldt delta covers 25,347 km (9,787 sq mi), making it the largest in Europe.

The Rhine–Meuse–Scheldt delta is economically extremely important, since the three rivers are major navigable waterways. The delta is the entrance from the North Sea to the German and Central European hinterland (and to a lesser extent France). Major ports in the delta are Rotterdam, Antwerp (Belgium), Vlissingen, Amsterdam (through the Amsterdam–Rhine Canal), and Ghent (through the Ghent–Terneuzen Canal). The land areas in the delta are protected from flooding by the Dutch Delta Works.

The Hollandse or Hollandsche IJssel (pronounced [ˌɦɔlɑntsə ˈʔɛisəl]; "Holland IJssel", as opposed to the 'regular' or Gelderland IJssel) is a branch of the Rhine delta that flows westward from Nieuwegein on river Lek through IJsselstein, Gouda and Capelle aan den IJssel to Krimpen aan den IJssel, where it ends in the Nieuwe Maas. Another branch called Enge IJssel ("Narrow IJssel") flows southwest from Nieuwegein. The name IJssel is thought to derive from the Germanic i sala, meaning "dark water". Originally, the Hollandse IJssel forked off from river Lek at Nieuwegein, but the connection was cut off with the Hollandse IJssel nowadays only draining the surrounding pastures.

If the North Sea floods, the Hollandse IJssel allows water through the Rotterdam Waterway to flood low-lying land east of Rotterdam. The Delta Works included a steel barrier that can be lowered within minutes to block the waterway. The sea protection constructions were built at the mouth of the Hollandse IJssel in 1957.

The Western Scheldt (Dutch: Westerschelde [ˌʋɛs.tərˈsxɛl.də] ), in the province of Zeeland in the southwestern Netherlands, is the estuary of the Scheldt river. This river once had several estuaries, but the others are now disconnected from the Scheldt, leaving the Westerschelde as its only direct route to the sea. The Western Scheldt is an important shipping route to the Port of Antwerp, Belgium. Unlike the Eastern Scheldt estuary, it could not be closed off from the sea by a dam as part of the Delta Works. Instead, the dykes around it have been heightened and reinforced.

Over the years, many ships have sunk in the Western Scheldt. Following an agreement between the Dutch and Belgian governments in 1995, many of the wrecks have been removed to improve shipping access to Antwerp. It was expected that the last 38 wrecks in the shipping channel would be removed during 2003. The largest wreck, which was removed in June 2003, was that of the 131-metre (430 ft) long Alan-A-Dale, sunk in December 1944 during the Second World War by a German Biber midget submarine.

The Zuiderzee Works (Dutch: Zuiderzeewerken) is a system of dams and dikes, land reclamation and water drainage work, which was the largest hydraulic engineering project undertaken by the Netherlands during the twentieth century. The project involved the damming of the Zuiderzee, a large, shallow inlet of the North Sea, and the reclamation of land in the newly enclosed water using polders. Its main purposes are to improve flood protection and create additional land for agriculture.

The enormous scale of the works required the creation of a joint venture company comprising several large dredging contractors, known as the Maatschappij tot Uitvoering van Zuiderzeewerken. The American Society of Civil Engineers declared the works, together with the Delta Works in the South-West of the Netherlands, as among the Seven Wonders of the Modern World.

The Oosterscheldekering (pronounced [oːstərˌsxɛldəˈkeːrɪŋ] English: Eastern Scheldt barrier), between the islands Schouwen-Duiveland and Noord-Beveland, is the largest of the Delta Works, a series of dams and storm surge barriers, designed to protect the Netherlands from flooding from the North Sea. The construction of the Delta Works was a response to the widespread damage and loss of life in the North Sea flood of 1953.

The Haringvliet is a large inlet of the North Sea, in the province of South Holland in the Netherlands. It is an important estuary of the Rhine-Meuse delta.

Near Numansdorp, the Hollands Diep splits into the Haringvliet and the Volkerak estuaries. It is closed off near Goedereede from the North Sea by the Haringvlietdam, which provides a road connection between the island of Voorne to the north and the island of Goeree-Overflakkee to the south. The dam with its sluices was built as part of the Delta Works sea barrier protection works.

The Volkerak is a body of water in the Netherlands. It is part of the Rhine–Meuse–Scheldt delta, and is situated between the island Goeree-Overflakkee to the north-west and the Dutch mainland to the south and east. The western part of the Volkerak is also called Krammer. Tributaries of the Volkerak are the Dintel and Steenbergse Vliet.

Before 1987, it was a tidal river open to the North Sea, but it was closed off as part of the Delta Works; it is now a fresh water lake.

The Veerse Gatdam is a man-made barrier across the former Eastern Scheldt estuary branch known as the Veerse Gat, between Walcheren and Noord-Beveland islands in Zeeland, Netherlands. The barrier was completed on 27 April 1961. Because of the completion of this barrier and the completion of the Zandkreekdam a year prior on the eastern end of the waterway, the Veerse Meer was created. The Veerse Gatdam is the third structure constructed as part of the Delta Works water management system. The N57 motorway runs along the top of the barrier.