Wolderwijd

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Wolderwijd

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Wolderwijd as seen from Flevoland looking towards Harderwijk
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Wolderwijd
The Wolderwijd amongst the bordering lakes of the province of Flevoland
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Wolderwijd
Location within the Netherlands
Location Between Flevoland and Gelderland
Coordinates 52°20′50″N5°34′30″E / 52.34722°N 5.57500°E / 52.34722; 5.57500 Coordinates: 52°20′50″N5°34′30″E / 52.34722°N 5.57500°E / 52.34722; 5.57500
Type Bordering lake
Basin  countries Netherlands
Designation Ramsar wetland of international importance (2000)
Built 1963 (1963)
Average depth 1.7 m (5 ft 7 in)
Islands De Zegge, De Biezen
Settlements Harderwijk, Zeewolde

The Wolderwijd is a bordering lake situated in the Netherlands, created in 1967 by the gaining of land in Southern Flevoland. [1] It is one of four Veluwe bordering lakes. On the northern and western bank it is encompassed by the municipality of Zeewolde, in the Province of Flevoland, and on the southern and eastern bank it is encompassed by the municipality of Harderwijk in the Province of Gelderland. As the bordering lakes of Flevoland are strictly speaking one mass of water there are no exact markers on where the Wolderwijd ends and the adjacent lakes start. In the west near Strand Horst the Wolderwijd becomes the Nuldernauw and in the east at the aqueduct at the provincial road N302 it becomes the Veluwemeer. [1]

Bordering lakes

In the Netherlands, the bordering lakes are a chain of lakes which separate the Flevopolder from the ancient lands of the provinces of Gelderland and Utrecht and the Noordoostpolder.

Netherlands Constituent country of the Kingdom of the Netherlands in Europe

The Netherlands is a country located mainly in Northwestern Europe. The European portion of the Netherlands consists of twelve separate provinces that border Germany to the east, Belgium to the south, and the North Sea to the northwest, with maritime borders in the North Sea with Belgium, Germany and the United Kingdom. Together with three island territories in the Caribbean Sea—Bonaire, Sint Eustatius and Saba— it forms a constituent country of the Kingdom of the Netherlands. The official language is Dutch, but a secondary official language in the province of Friesland is West Frisian.

Flevoland Province of the Netherlands

Flevoland is the twelfth and last province of the Netherlands, established on 1 January 1986, when the southern and eastern Flevopolders were merged into one provincial entity. It is located in the centre of the country, where the former Zuiderzee was. Almost all of the land belonging to Flevoland was reclaimed only in the 1950s and 1960s. The province has about 407,905 inhabitants (2016) and consists of 6 municipalities. Its capital is Lelystad and most populous city Almere.

Contents

Use

The lake was created as a buffer between the old land of the Veluwe and the newly created Flevopolder, to ensure that the water level of the Veluwe would not drop. [1] The lake receives water from the neighboring Veluwemeer and several streams and sluices. An additional source is low-phosphate water from the Flevopolder to counter eutrophication. [2]

Veluwe forested hilly area with multiple kinds of terrain, including wetland and heathland

The Veluwe is a forest-rich ridge of hills (1100 km2) in the province of Gelderland in the Netherlands. The Veluwe features many different landscapes, including woodland, heath, some small lakes and Europe's largest sand drifts.

Flevopolder

The Flevopolder is a polder, or region of reclaimed land, in Flevoland, Netherlands. The eastern part was drained in 1955 and the southern part in 1968.

Eutrophication ecosystem response to the addition of substances

Eutrophication, or hypertrophication, is when a body of water becomes overly enriched with minerals and nutrients which induce excessive growth of algae. This process may result in oxygen depletion of the water body. One example is an "algal bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients. Eutrophication is often induced by the discharge of nitrate or phosphate-containing detergents, fertilizers, or sewage into an aquatic system.

The Wolderwijd lake is used for commercial fishery, boating, shipping traffic, water management, and sand extraction. [2]

The lake, together with the Nuldernauw, has also been designated as a Ramsar wetland of international importance since 29 August 2000. It was designated as such because it held over 1% of relevant biogeographical populations of two bird species, the swan species Cygnus bewickii (1.6%) and the common pochard (Aythya ferina) (2.1%). [2]

Tundra swan species of bird

The tundra swan is a small Holarctic swan. The two taxa within it are usually regarded as conspecific, but are also sometimes split into two species: Bewick's swan of the Palaearctic and the whistling swan proper of the Nearctic. Birds from eastern Russia are sometimes separated as the subspecies C. c. jankowskii, but this is not widely accepted as distinct, with most authors including them in C. c. bewickii. Tundra swans are sometimes separated in the subgenus Olor together with the other Arctic swan species.

Common pochard duck

The common pochard is a medium-sized diving duck. The scientific name is derived from Greek aithuia an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ferina, "wild game", from ferus, "wild".

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References

  1. 1 2 3 "Wolderwijd" (in Dutch). Rijkswaterstaat . Retrieved 7 May 2014.
  2. 1 2 3 "The Annotated Ramsar List: The Netherlands". The Ramsar Convention on Wetlands. 12 February 2013. Retrieved 7 May 2014.