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Posts tagged West Frisian Islands

Canals and Dikes in the Netherlands

52.6N 5.3E

December 27th, 2010 Category: Lakes, Rivers

The Netherlands - December 19th, 2010

The full version of this APM image stretches from the West Frisian Islands (top), a chain of islands in the North Sea off the coast of the Netherlands, across the Wadden Sea to the IJsselmeer and the Markermeer, and finally to a series of almost parallel rivers.

The IJsselmer and Markermeer are large, shallow lakes, separated by dikes. The dikes appear as thin, light green lines in this image. Inland, canals also appear as thin, light green lines.

The eastern part of the city of Amsterdam can be observed as a bright green area in the full image at the edge of the Markermeer, on the Amstel River. The three other rivers to the south of the lakes and Amsterdam are (from north to south): the Lek River, Waal River and Maas River.

West Frisian Islands and Bodies of Water in the Netherlands

53.0N 5.4E

December 20th, 2010 Category: Lakes, Rivers

The Netherlands - December 19th, 2010

This APM image shows the West Frisian Islands, a chain of islands in the North Sea off the coast of the Netherlands. The body of water located between the islands and the mainland is called the Wadden Sea, an area of mudflats.

In the full image, two large lakes known as the IJsselmeer and the Markermeer can be observed to the south, in the central part of the full image, connected to the Wadden Sea. Below these lakes, in the bottom section, are three rivers flowing more or less horizontally across the image: the Lek River, Waal River and Maas River.

West Frisian Islands Separating Wadden and North Seas, the Netherlands

53.0N 5.1E

December 10th, 2010 Category: Lakes

The Netherlands - December 8th, 2010

This orthorectified image shows the West Frisian Islands, a chain of islands in the North Sea off the Dutch coast. They belong to the Kingdom of the Netherlands.

The islands shield the mudflat region of the Wadden Sea (between the islands and the mainland), large parts of which fall dry during low tide, from the North Sea (above and left). Two other bodies of waters connected to the Wadden Sea can be observed here: the IJsselmeer and the Markermeer.

The IJsselmeer appears various shades of grey and black, and is partially frozen. The Markermeer, connected to the IJsselmeer and best observed at the bottom of the full image, also appears partially frozen. Both lakes are shallow, the former about 5 to 6 meters in depth and the latter about 3 to 5 meters in depth.

The West Frisian Islands and the Houtribdijk, Holland – February 2nd, 2009

February 2nd, 2009 Category: Image of the day

Holland (The Netherlands) - January 30th, 2009

Holland (The Netherlands) - January 30th, 2009

The West Frisian Islands are a chain of islands in the North Sea off the Dutch coast. The islands visible here belong to Holland (the Netherlands); however, the chain continues further east as the German East Frisian Islands.

From west to east the islands are: Noorderhaaks, Texel, Vlieland, Richel, Griend, Terschelling, Ameland, Rif, Engelsmanplaat and Schiermonnikoog. The ones obscured by clouds, continuing to the East, are:  Simonszand, Rottumerplaat, Rottumeroog and Zuiderduintjes.

The Frisian Islands are nowadays mostly famous as a holiday destination. Ferries allow tourists and residents to move from island to island.

Below the islands is what was formerly known as the Zuiderzee, a shallow inlet of the North Sea in the northwest of the Netherlands.

In the 20th century, however, the majority of the Zuiderzee was closed off from the North Sea (leaving the mouth of the inlet to become part of the Wadden Sea) and the salt water inlet changed into a fresh water lake called the IJsselmeer.

The water in the inlet contains a dark green algal bloom that appears more intense in the souther section. This is because the lower part is actually a shallow lake called the Markermeer.

The Markermeer and the IJsselmeer are separated by a dike called the Houtribdijk. It is 30 kilometers long and connects the cities of Lelystad and Enkhuizen. The structure itself is not visible in the image, but it’s precise location can be identified as the line where the algae changes from bright green to dark greenish-black.

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