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Posts tagged Houtribdijk

Afsluitdijk and Houtribdijk Delineating the IJsselmeer, Netherlands

52.7N 5.3E

March 13th, 2011 Category: Lakes

Netherlands - February 17th, 2011

This APM image shows the Afsluitdijk, a major causeway in the Netherlands, running 32 kilometers from North Holland province to Friesland province. It is visible here as a light green line separating the Wadden Sea (part of the North Sea, above) from the IJsselmeer (below).

Also visible near the bottom of the image is the Houtribdijk, a 30-kilometer-long dike connecting the cities of Lelystad and Enkhuizen. On one side of the dike is the Markermeer (bottom) and on the other is the IJsselmeer.

Island Province of Flevoland, the Netherlands – February 20th, 2011

52.5N 5.5E

February 20th, 2011 Category: Image of the day, Lakes

Netherlands - February 1st, 2011

This orthorectified image focuses on the Dutch province of Flevoland. It is located in the centre of the country, at the location of the former Zuiderzee, and consists of two large islands.

Two bodies of water can be observed in the upper part of the image. To the left is the Markermeer, a 700 km2 (270 sq mi) lake. It is separated from the other body of water, the 1100 km² IJsselmeer, by a dike called the Houtribdijk, visible as a faint grey line.

Dikes in the Netherlands: Afsluitdijk and Houtribdijk

52.9N 5.0E

December 21st, 2010 Category: Lakes

The Netherlands - December 8th, 2010

Several bodies of water in the Netherlands can be observed here: the Wadden Sea (top), the IJsselmeer (right) and the Markermeer (bottom, center). The latter two are shallow lakes, and appear covered in ice.

The Wadden Sea and the IJsselmeer are separated by the Afsluitdijk, a major causeway running from Den Oever on Wieringen in North Holland province, to the village of Zurich (mun. Wûnseradiel) in Friesland province.

The IJsselmeer and the Markermeer are separated by the Houtribdijk, a dike that connects the cities of Lelystad and Enkhuizen.

Dikes and Lakes in the Netherlands – August 6th, 2009

52.6N 5.4E

August 6th, 2009 Category: Image of the day, Lakes

Netherlands - July 28th, 2009

Netherlands - July 28th, 2009

Netherlands - July 27th, 2009

Netherlands - July 27th, 2009

This ASAR image gives a clear view of the Markermeer and IJsselmeer lakes, formerly the Zuiderzee inlet, in the Netherlands. These two lakes were created by the building of two dikes across the inlet: the Afsluitdijk and the Houtribdijk.

The former is visible as a thin, straight grey line across the dark waters in the upper right quadrant.  The dike, which was constructed between 1927 and 1933, has a length of 32 km (20 miles) and a width of 90 m, at an initial height of 7.25 m above sea-level. It runs from Den Oever on Wieringen in North Holland province, to the village of Zurich in Friesland province.

The Houtribdijk also appears as a narrow line, connecting the cities of Lelystad and Enkhuizen. It is 30 kilometers long and was built between 1963 and 1975. The lake below is the Markermeer, and the other lake above, between the two dikes, is the IJsselmeer.

The color image, captured one day earlier, gives a comparative view of these lakes, showing a brighter green color in the Markermeer. This color difference may be due to a difference in algal concentration or in the suspended sediments – the Markermeer has greater wave action, which causes sediments to be churned up in the water.

Green Waters of the Markermeer, the Netherlands – June 11th, 2009

52.5N 5.2E

June 11th, 2009 Category: Image of the day, Lakes

Netherlands - May 30th, 2009

Netherlands - May 30th, 2009

Sediments and algae color bodies of water near the Dutch coast various shades of brown and green. Particularly striking is the bright yellow-green Markermeer (bottom center), a 700 km² lake in the central Netherlands between North Holland, Flevoland and its larger sibling, the IJsselmeer.

A shallow lake at some 3 to 5 m in depth, it is named after the small former island, now peninsula, of Marken that lies within it. The southwest side of the lake is known as the IJmeer.

The Markermeer used to be part of the Zuiderzee, a saltwater inlet of the North Sea. This inlet was dammed off by the 32 km long Afsluitdijk (Closure Dike) in 1932, turning the Zuiderzee into the freshwater IJsselmeer.

The following years saw the reclamation of extensive tracts of land as large polders in a massive project known as the Zuiderzee Works. Part of the construction of the last polder was building the Houtribdijk, also called Markerwaarddijk, finished in 1976, which hydrologically splits the IJsselmeer in two, the southern section being the Markermeer.

The Markermeer was not originally intended to remain a lake; one of these polders, the Markerwaard, was to occupy the area of the current Markermeer. However, because of changing priorities and doubts about the financial feasibility, the Markerwaard was indefinitely postponed in the 1980s and the Markermeer has since begun to become a valuable ecological and recreational asset of its own.

The Markermeer is used as a freshwater reservoir and a buffer against floodwaters and droughts. In 2003 the Netherlands was hit by drought, and several minor dikes were endangered. Water from the Markermeer was used to keep the area surrounding Amsterdam wet, thereby keeping the dikes safe.