Ilse (Oker)
Ilsetal with Brocken ( 2012)
The Ilse, called the upper reaches Concealed Ilse and the underflow channel Ilse, is a 62 km long, south-eastern and orographic right-hand tributary of the Oker in Saxony -Anhalt and Lower Saxony ( Germany ). It flows in the Harz Mountains and the northern Harz foreland.
History and catchment area
The Ilse rises in Saxony-Anhalt Harz district in the Upper Harz. Your source lies within the Harz Nature Park / Saxony- Anhalt Harz National Park on the eastern slope of the Heinrichshöhe. It is located near the county road 1356 to about 960 m above sea level. NHN.
Initially, the Ilse flows through the valley between the Heinrichshöhe and the Brocken in the west and the eastern corner racing mountain - called chunks bed. North Northeast of the chunk it runs - sections visible in the upper reaches of the viewer - as a Covert Ilse gurgling under large boulders that cover as a glacial stream block the river bed. On Nordnordostfuß of the Brocken, they happened east, intersects the creek a narrow valley in the high area of the resin in which it forms a series of small cascades, which are known as Ilse cases and are accompanied by the Heinrich -Heine- way.
After that, Ilse flows after a sharp right bend for a short running distance in a Längstalung, which runs parallel to the northern edge in the interior of the resin. The then again closer Ilsetal east is dominated by the rugged, cross -winning Ilsenstein.
After leaving the Harz National Park, the Ilse Ilse castle, where it is passed under the bridge and jug out in the course of the former copper smelter in the tunnel flows. Below Ilsenburg it enters into the Harz mountains and flows through or passes through the villages Veckenstedt and aquatic life where it leaves the Harz / Saxony- Anhalt after receiving the influent from the right Schneibekebachs. They swung at Berßel to the northwest, can be the Great Fallstein right and follow below Osterwieck the course of the northeastern little Fallstein. Behind Hoppenstedt stage and takes her by the Rimbeck flowing from left vocal corner, which rises in the Eckertal and is also fed from the plug, and reaches the Lower Saxony Wolfenbüttel. At the height of Will Eckes like the Mills -Ilse branches off to the east and flows through the still open to visitors watermill building Hagenmühle in the village of Hornburg.
The other part of Ilse happened Horn Petersburg center -west and is called the underflow channel Ilse. In this opens the confluence of the Schiffgraben -west, passing through the Great fracture and the Mills - Ilse, who receives the Zieselbach before.
West of Lower Saxony Börßum opens the Ilse to the eastern tributary of the rabbit Beeke to about 82 m above sea level. NHN in the all- inflow Oker. Prior to regulation, the Ilse was east of the Oker and resulted only in front of the historic Okerübergang Ohrum at Hedwigsburg. South of Hedwigsburg is still an oxbow lake called Old Ilse available.
The catchment area of Ilse is about 258 km ². The Ilse is Okereinzugsgebiet the easterly flow of the resin and borders from the catchment area of the river Weser from the Elbe.
Water supply
The rich groundwater resources in the triangle formed channel Ilse and Oker be used by Salzgitter AG, Salzgitter for the supply of drinking water and the iron and steel works. Overall, in the groundwater works Börßum -Hein Ingen promote 88 wells over 22 million cubic meters a year by 1.2 meter thick concrete pipelines for processing plant in Adersheim.
Water quality
The Ilse is monitored for water quality and the implementation of the European Water Framework Directive from the State Office for flood protection and water management Saxony- Anhalt, which they divided into two geographical sections: from the source to the crash in Bracknell ( as a surface water body with the No. WESOW20 -00) and on to the confluence with the Oker in Lower Saxony (under the OWK no. WESOW21 -00).
The 13- kilometer-long overflow is " very good" in the data sheet of the country of operation 2008 as regards the structure quality at more than 50%, ie, as " mostly natural ". The biological quality and the chemical status are indeed "good", the overall rating of the eco - state is, however, as "moderate " because Orienteering parameters for the oxygen content and pH have not been complied with.
The 49 -kilometer-long section to the mouth is as heavily modified water bodies ( " HMWBs " - Heavy Modified Water Body) classified, which is due to Untertunnelungen, straightening and dike construction works. The biological-chemical state only receives the grade of " 4", which is due to decreased oxygen levels and exceeded phosphate values (eg from fertilizers ). The overall ecological potential is " unsatisfactory" specified.
Sage and Literature
The popular legend personifies the beautiful Princess Ilse Ilse as that in the rocks of Ilse Stein has its abode. Mentioned in literature is the river among other things in the resin Travel Heinrich Heine.
"It's indescribable, with what joy, naivete and grace the Ilse falls down over the rock pieces adventurous formed, so that the water up here hisses wildly and hintrippelt down again over the small stones as a lively girl. Yes, Ilse is a princess, the laughing and flourishing runs down the mountain. "