The Jade Bight (or Jade Bay; German: Jadebusen) is a bight or bay on the North Sea coast of Germany. It was formerly known simply as Jade or Jahde. Because of the very little input of freshwater, it is classified as not an estuary but a bay.
Intrusion of the sea
About 180 km² (70 mi²) in area, the Jade was largely created by storm floods during the 13th and 16th centuries. Since the early 14th century, it has joined eastward to the estuary of river Weser. For some time, there were three permanent connecting branches and one flood bed between the river and the bight, forming an estuarine delta. The first of these junctions was closed in 1450 by dikes, the last one in 1515. However, it took more than a century, for most of the area flooded by these connections to be regained for pasture and arable land.
In the west, the Jade extended far into the Frisian peninsula. From the early 16th century, a number of dikes were built against the storm floods and to gain arable land. The main dike, Ellenser Damm, was built between 1596 and 1615 by the County of Oldenburg before the agreement with the objecting County of East Frisia was finished successfully.
Decay of the Frisian community
The extension of Jade Bight and its branches fragmented the free Frisian territory of Rüstringen in Bant in the northwest, most of which has disappeared in the waves, Bovenjadingen ("Above the Jade") with the low moraine hills of Friesische Wehde in the southwest, Butjadingen ("Outside the Jade") in the northeast, which was an island for almost two centuries, and Stadland ("Bank-Land"), which became a narrow island along the left bank of the Weser in 1384. The devastation by floods and the losses of land weakened the Frisian community. In the years about 1400, the Free City of Bremen tried to rule Standland and Butjadingen. In the beginning of 16th Century, all countries around Jade Bight were conquered by the Counts of Oldenburg.
Organized construction of dikes
Together with the conquest of Stadland island, the Lockfleth, the largest branch of Weser delta, was interrupted by a dike at Ovelgönne in 1515. In the next years the water course was cut off in more sites. The must important projects led out within little more than a century were the Ellenser Damm across the Schwarzes Brack in the west of the bay in 1596 to 1615 and the New Hoben-Dike in the east in 1643. The coast south of this dike caused long lasting problems: Here the coast had reached a large moss. The bog was more and more fractioned by high floods, and dikes built on the bog proved to be very fragile.
Tidal flows make the neck of Jade Bight is the deepest natural channel near Germany's North Sea coast. In 1853, the Kingdom of Prussia bought a part of the western shore of the bay from Oldenburg, in order to use this harbour as a Prussian naval base, later called Wilhelmshaven. This way, during World War I, the German High Seas Fleet (Hochseeflotte), the main battle fleet of the Imperial German Navy (Kaiserliche Marine), was based at Wilhelmshaven in the Jade Bight. After World War II, Wilhelmshafen has become the main German port for the import of petrol.
The foreshore areas of Jade Bight form a part of the German Wadden Sea National Parks.
- Elkins, T H (1972). Germany (3rd ed.). London: Chatto & Windus, 1972, p. 281. ASIN B0011Z9KJA.
- Holden, Joseph (ed.) (2008), An Introduction to Physical Geography and the Environment, 2nd ed., Pearson, Harlow, 2008, p. 483. ISBN 978-0-13-175304-4.
- Britannica Online Encyclopedia: Jade Bay
- Günther Lang, Bundesanstalt für Wasserbau (Federal Bureau for Water-Bound Constructions): Ein Beitrag zur Tidedynamik der Innenjade und des Jadebusens (A contribution on the tidal dynamics of Innenjade and Jadebusen) (in German)
- Karl-Ernst Behre: Die Geschichte der Landschaft um den Jadebusen, Brune-Mettker GmbH, Wilhelmshaven 2012, ISBN 978-3-941929-02-9
- Karl-Ernst Behre: Das Moor von Sehestedt − Landschaftsgeschichte am östlichen Jadebusen. Vol. 21 of the Reihe Oldenburger Forschungen
- David Blackbourn: The Conquest of Nature: Water, Landscape, and the Making of Modern Germany (2006)
- Eilert Schimmelpenning: Der Jadebusen und das Schwarze Brack, Schortens, 2004, ISBN 3-936691-21-5
- More texts and linked historical maps, see list of sources of the map "Jadebusen und Weserdelta"
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