The Kelbra Dam (german: Talsperre Kelbra) is a

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...

on the River

Helme The Helme is river in central Germany that is about long and which forms a left-hand, western tributary of the Unstrut in the states of Thuringia and Saxony-Anhalt. Course The river rises in Thuringia south of the Harz mountains in the dis ...

in the German state of

Saxony-Anhalt Saxony-Anhalt (german: Sachsen-Anhalt ; nds, Sassen-Anholt) is a state of Germany, bordering the states of Brandenburg, Saxony, Thuringia and Lower Saxony. It covers an area of and has a population of 2.18 million inhabitants, making it the ...

. Behind the dam is the lake known as the Kelbra Reservoir (''Stausee Kelbra'') or Kelbra Flood Retention Basin (''Hochwasserrückhaltebecken Kelbra'').

Purpose

The dam was built to provide

flood protection Flood control methods are used to reduce or prevent the detrimental effects of flood waters."Flood Control", MSN Encarta, 2008 (see below: Further reading). Flood relief methods are used to reduce the effects of flood waters or high water level ...

and its reservoir collects the waters of the Harz flowing into the southern Harz Foreland via the River Helme and its tributaries. The reservoir lake stores water for

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow Crop, crops, Landscape plant, landscape plants, and Lawn, lawns. Irrigation has been a key aspect of agriculture for over 5,00 ...

and is used for

angling Angling is a fishing technique that uses a fish hook or "angle" (from Old English ''angol'') attached to a fishing line to tether individual fish in the mouth. The fishing line is usually manipulated via a fishing rod, although rodless techniqu ...

and

recreation Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for enjoyment, amusement, or pleasur ...

. Both dam and lake are operated jointly and cooperatively by the Thuringian Long Distance Water Supply (''Thüringer Fernwasserversorgung'') and the Saxony-Anhalt Dam Company (''Talsperrenbetrieb von Sachsen-Anhalt'').

Dam

The Kelbra Dam was built from 1962 to 1966 between

Berga Berga () is the capital of the ''comarca'' (county) of Berguedà, in the province of Barcelona, Catalonia, Spain. It is bordered by the municipalities of Cercs, Olvan, Avià, Capolat and Castellar del Riu. History Berga derives its name from ...

and

Kelbra Kelbra () is a town the Mansfeld-Südharz district, in Saxony-Anhalt, Germany. It is situated north of the Kyffhäuser mountains, approx. 20 km west of Sangerhausen, and 20 km east of Nordhausen. Kelbra is part of the ''Verbandsgemeind ...

in the region known as the

Goldene Aue The Goldene Aue (German: "golden lowland", also " ... bottom" or " ... meadow" / " ... pasture", with "Au referring to a low-lying area, often a wetland) is a valley in eastern Germany, in the states Thuringia and Saxony-Anhalt. It is situated betw ...

between

Nordhausen Nordhausen may refer to: * Nordhausen (district), a district in Thuringia, Germany ** Nordhausen, Thuringia, a city in the district **Nordhausen station, the railway station in the city * Nordhouse, a commune in Alsace (German: Nordhausen) * Narost ...

in the west and

Sangerhausen Sangerhausen () is a town in Saxony-Anhalt, central Germany, capital of the district of Mansfeld-Südharz. It is situated southeast of the Harz, approx. east of Nordhausen, and west of Halle (Saale). About 26,000 people live in Sangerhausen (2 ...

in the east. It is located in the district of

Mansfeld-Südharz Mansfeld-Südharz is a district in Saxony-Anhalt, Germany. Its area is . History The district was established by merging the former districts of Sangerhausen and Mansfelder Land as part of the reform of 2007. In the German parliament, the Bun ...

(

) on the northwestern end of the

Kyffhäuser The Kyffhäuser (,''Duden - Das Aussprachewörterbuch, 7. Auflage (German)'', Dudenverlag, sometimes also referred to as ''Kyffhäusergebirge'', is a hill range in Central Germany, shared by Thuringia and Saxony-Anhalt, southeast of the Harz mou ...

hills. It is only a few kilometres from the border with the state of

Thuringia Thuringia (; german: Thüringen ), officially the Free State of Thuringia ( ), is a state of central Germany, covering , the sixth smallest of the sixteen German states. It has a population of about 2.1 million. Erfurt is the capital and larg ...

and impounds the river system of the

into the Kelbra Reservoir. Its main and auxiliary barriers are

earth-fill dam An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and ...

s made of

gravel Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classifi ...

and binding material (''Erdstoffen''). Both have a sloping internal

grout curtain A grout curtain is a barrier that protects the foundation of a dam from seepage and can be made during initial construction or during repair. Additionally, they can be used to strengthen foundations and contain spills. Characteristics A grout curt ...

clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay par ...

on the water side. The crest of the main dam is 4,066 m long and 7 m above the valley floor; the acute-angled auxiliary dam is 3,379 m long. On the southern shore of the lake is the Numburg Cave.

Reservoir

The Kelbra

Reservoir A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation. Reservoirs can be created in a number of ways, including contro ...

lies on the river Helme behind the Kelbra Dam at the northwestern foot of the Kyffhäuser hills. It is located within the Goldene Aue, mainly in the district of

(

); only a small area in its extreme southwestern sector, which is on the border of the

Kyffhäuserkreis The Kyffhäuserkreis is a district in the northern part of Thuringia, Germany. Neighboring districts are the districts Mansfeld-Südharz, Saalekreis und Burgenlandkreis in Saxony-Anhalt, and the districts Sömmerda, Unstrut-Hainich-Kreis and Eich ...

and Nordhausen districts, lies in Thuringia, which touches its southwestern

shore A shore or a shoreline is the fringe of land at the edge of a large body of water, such as an ocean, sea, or lake. In physical oceanography, a shore is the wider fringe that is geologically modified by the action of the body of water past a ...

. Initially only a green - i.e. normally dry -

flood retention basin A retention basin, sometimes called a wet pond, wet detention basin, or stormwater management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design. It is used to manage stormwater r ...

was planned. In the event, however, a full dam was built in order to create a permanent reservoir, and an auxiliary dam, in order to provide a basin that absorbed the bulk of the Helme river system in the event of high water. As a result, there are two adjacent basins, the lower one being permanently impounded – i.e. as a permanent lake – a gauge on the lake indicating a height of , a storage volume of 12.3 million m³ and a surface area of about 600 ha. The upper basin, which is bordered on its western and northwestern shores by arable and

pasture Pasture (from the Latin ''pastus'', past participle of ''pascere'', "to feed") is land used for grazing. Pasture lands in the narrow sense are enclosed tracts of farmland, grazed by domesticated livestock, such as horses, cattle, sheep, or swine ...

land, is only impounded during times of high water. Together, both basins have a volume of 35.6 million m³, of which 23 million m³ is exclusive flood control capacity. Following the completion of the trial impounding of the Kelbra Reservoir, which lasted until 1969, it was officially taken into service. The lake is used extensively for

tourist Tourism is travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours. The World Tourism Organization defines tourism mo ...

purposes and has facilities for

sailing Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the ''water'' (sailing ship, sailboat, raft, windsurfer, or kitesurfer), on ''ice'' (iceboat) or on ''land'' (land yacht) over a chosen cour ...

and

windsurfing Windsurfing is a wind propelled water sport that is a combination of sailing and surfing. It is also referred to as "sailboarding" and "boardsailing", and emerged in the late 1960s from the aerospace and surf culture of California. Windsurfing ga ...

, a beach for swimming, a

campsite A campsite, also known as a campground or camping pitch, is a place used for overnight stay in an outdoor area. In British English, a ''campsite'' is an area, usually divided into a number of pitches, where people can camp overnight using te ...

boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ...

and

bicycle A bicycle, also called a pedal cycle, bike or cycle, is a human-powered or motor-powered assisted, pedal-driven, single-track vehicle, having two wheels attached to a frame, one behind the other. A is called a cyclist, or bicyclist. Bic ...

hire, a

petting zoo A petting zoo (also called a children's zoo, children's farm, or petting farm) features a combination of domesticated animals and some wild species that are docile enough to touch and feed. In addition to independent petting zoos, many genera ...

waterslide A water slide (also referred to as a flume, or water chute) is a type of Playground slide, slide designed for warm-weather or indoor recreational use at water parks. Water slides differ in their riding method and therefore size. Some slides re ...

and, near the lake, various

inn Inns are generally establishments or buildings where travelers can seek lodging, and usually, food and drink. Inns are typically located in the country or along a highway; before the advent of motorized transportation they also provided accommo ...

s and other facilities.

Internationally important bird habitat

The reservoir is of international importance as a result of the variety of birds found on and around its waters, which, in terms of species as well as sheer numbers exceeds those settling on comparable stretches of water. For example, the following birds can regularly be observed here:

duck Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese, which are members of the same family. Divided among several subfamilies, they are a form t ...

(e.g.

mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa, and has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...

teal alt=American teal duck (male), Green-winged teal (male) Teal is a greenish-blue colour. Its name comes from that of a bird — the Eurasian teal (''Anas crecca'') — which presents a similarly coloured stripe on its head. The word is ofte ...

pochard Pochard is a common name used for several species of diving ducks: *Four species in the genus ''Aythya'': ** Common pochard, ''Aythya ferina'' ** Baer's pochard, ''Aythya baeri'' ** Ferruginous pochard, ''Aythya nyroca'' ** Madagascar pochard, '' ...

wader 245px, A flock of Dunlins and Red knots">Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflat ...

s ( peewit,

snipe A snipe is any of about 26 wading bird species in three genera in the family Scolopacidae. They are characterized by a very long, slender bill, eyes placed high on the head, and cryptic/camouflaging plumage. The ''Gallinago'' snipes have a near ...

, redshank,

curlew The curlews () are a group of nine species of birds in the genus ''Numenius'', characterised by their long, slender, downcurved bills and mottled brown plumage. The English name is imitative of the Eurasian curlew's call, but may have been in ...

divers Diver or divers may refer to: *Diving (sport), the sport of performing acrobatics while jumping or falling into water *Practitioner of underwater diving, including: **scuba diving, **freediving, **surface-supplied diving, **saturation diving, a ...

(

great crested grebe The great crested grebe (''Podiceps cristatus'') is a member of the grebe family of water birds noted for its elaborate mating display. Taxonomy The great crested grebe was formally described by the Swedish naturalist Carl Linnaeus in 1758 in t ...

little grebe The little grebe (''Tachybaptus ruficollis''), also known as dabchick, is a member of the grebe family of water birds. The genus name is from Ancient Greek ''takhus'' "fast" and ''bapto'' "to sink under". The specific ''ruficollis'' is from Latin ...

black-necked grebe The black-necked grebe or eared grebe (''Podiceps nigricollis'') is a member of the grebe family of water birds. It was described in 1831 by Christian Ludwig Brehm. There are currently three accepted subspecies, including the nominate subspecie ...

rails Rail or rails may refer to: Rail transport *Rail transport and related matters *Rail (rail transport) or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' ( ...

(

water rail The water rail (''Rallus aquaticus'') is a bird of the Rallidae, rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are bird migration, migratory, but this species is a perma ...

coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usually ...

mute swan The mute swan (''Cygnus olor'') is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurosiberia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home ...

black-headed gull The black-headed gull (''Chroicocephalus ridibundus'') is a small gull that breeds in much of the Palearctic including Europe and also in coastal eastern Canada. Most of the population is migratory and winters further south, but some birds res ...

and

bittern Bitterns are birds belonging to the subfamily Botaurinae of the heron family Ardeidae. Bitterns tend to be shorter-necked and more secretive than other members of the family. They were called ''hæferblæte'' in Old English; the word "bittern ...

(

little bittern The little bittern or common little bittern (''Ixobrychus minutus'') is a wading bird in the heron family, Ardeidae. ''Ixobrychus'' is from Ancient Greek ''ixias'', a reed-like plant and ''brukhomai'', to bellow, and ''minutus'' is Latin for "sm ...

and

Eurasian bittern The Eurasian bittern or great bittern (''Botaurus stellaris'') is a wading bird in the bittern subfamily (Botaurinae) of the heron family Ardeidae. There are two subspecies, the northern race (''B. s. stellaris'') breeding in parts of Europe and ...

). In addition

white-tailed eagle The white-tailed eagle (''Haliaeetus albicilla'') is a very large species of sea eagle widely distributed across temperate Palearctic, Eurasia. Like all eagles, it is a member of the family Accipitridae (or accipitrids) which includes other diur ...

osprey The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor reaching more than in length and across the wings. It is brown o ...

, peregrine and

cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the IOC adopted a consensus taxonomy of seven ge ...

may also be spotted here. The variety of birds occurring during migration is particularly impressive. Up to 10,000 crane stop over on the reservoir and large flocks of larks and finches may be seen passing through. Since 1978 the reservoirs has been placed under the protection of the

Ramsar Convention The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of Ramsar sites (wetlands). It is also known as the Convention on Wetlands. It i ...

as an internationally important retreat for birds.

Sources

* ''Talsperren in Thüringen.'' Thüringer Talsperrenverwaltung, Autorenkollegium, 1993

External links

Kelbra Dam

{{in lang, de Dams in Saxony-Anhalt Dams in the Harz Bird reserves in Saxony-Anhalt Embankment dams Dams completed in 1966 RKelbra

Purpose

Dam

Reservoir

Internationally important bird habitat

See also

Sources

External links