Floods in the Harz and Harz foreland (2017)

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Path on the Ihme in Hanover, closed due to flooding , July 2017

The floods in the Harz and Harz foreland at the end of July 2017 were caused by days of rain from the low pressure area "Alfred", which fell in southern Lower Saxony , over parts of Hesse and Thuringia, as far as northern Bavaria. The heaviest rainfall was in the Harz Mountains with over 300 l / m² in places. As a result of the constant rain, streams and rivers in Lower Saxony, Thuringia and Saxony-Anhalt overflowed their banks and flooded towns.

weather condition

Throughout Germany, the last third of the month of July 2017 was characterized by low pressure areas. On average there was around 130 liters of precipitation per square meter with a target of 78 l / m². The month is one of the ten wettest months in July since measurements began in 1881.

The low "Alfred", which corresponded to the standard large-scale weather situation "Low Central Europe ", brought particularly heavy rainfall . It slowly shifted north from southern Poland and brought continuous rain from July 24 to 26, 2017 in southern Lower Saxony and Thuringia. The core of the precipitation area was in the Harz near Goslar and Bad Harzburg . At the Eckertalsperre in the Harz Mountains, 306 l / m² of rain fell between July 24 and 26; in the Harz foreland it was over 150 l / m² in places.

Consequences and Effects

Lower Saxony

Flood of the innermost at the Marienburg

The high amounts of precipitation led to considerable flood effects in several districts in southern Lower Saxony. There was damage to private buildings, public infrastructure and agricultural production areas. The Harz and the Hanover region as well as areas south of it, such as the area around Hildesheim, were badly affected . Floods mainly occurred on the Leine , Oker , Ilse , Radau and Innerste rivers . There were record water levels at several gauging points and at individual points on the Oker and the Nette century flood (HQ100 and HQ200). The water level of the Innerste rose near Hildesheim from 2.5 meters to around 7 meters and reached levels that had not been recorded since 1946. At the Marienburg , which is used by the University of Hildesheim , floods caused damage running into the millions.

In the district of Goslar was disaster alarm triggered and in Goslar the creek flooded Abzucht the historic market square. According to Lord Mayor Oliver Junk , the city has "not experienced such a dramatic flood situation in 70 or 80 years". Numerous streets in the Harz Mountains above Goslar were closed, and the Clausthal-Zellerfeld Oberschulenberg district was temporarily evacuated.

Flood damage resulted in rail traffic for blocking of several regional connections in the rooms of Braunschweig, Uelzen, Gifhorn, Hildesheim, Salzgitter, Wolfenbüttel and Bad Harzburg.

In Lower Saxony, according to the Lower Saxony Ministry of the Interior, more than 3,400 helpers were on duty who, among other things, installed thousands of sandbags. The state of Lower Saxony provided flood victims with 50 million euros for immediate relief measures .

Saxony-Anhalt

Flood of the Zillierbach in Wernigerode

Because of the constant rain, the water levels of some rivers in Saxony-Anhalt rose sharply. For the Holtemme , which rises in the Harz Mountains , warning level 4 was sometimes the highest flood warning level . In Wernigerode's district of Silstedt there was a breach of the dam on the Holtemme, whose water flowed into the place. After the water was up to a meter high in the streets, residents were evacuated with rubber boats. A 69-year-old woman died in Wernigerode who, according to residents, fell into the Holtemme.

Thuringia

For Thuringia, the German Weather Service announced the highest severe weather warning level . Here, at 165 l / m², most of the rain fell across Germany. The water levels in the rivers had not risen dramatically, however. Areas in northern Thuringia in particular, but also the cities of Suhl and Erfurt, were affected by the flooding .

See also

literature

Web links

Commons : Hochwasser im Harz und Harzvorland (2017)  - Collection of images, videos and audio files

Individual evidence

  1. ↑ Continuous rain comes to an end after the high water alarm in Die Zeit of July 26, 2017
  2. ↑ a b See literature: NLWKN: The July flood 2017 in southern Lower Saxony , p. 1
  3. ↑ Germany weather in July 2017 , press release of the German Weather Service
  4. ↑ Deep "Alfred" brings constant rain ( memento of the original from June 13, 2018 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. at mdr.de from July 24, 2017 @1@ 2Template: Webachiv / IABot / www.mdr.de
  5. ↑ See literature: NLWKN: The July flood 2017 in southern Lower Saxony , p. 7,10
  6. ^ Flood damage on the Marienburg domain culture campus in: Uni-intern. Issue 3, July 2017 of the University of Hildesheim
  7. ↑ Aerial photo of the flooded Marienburg on the Innerste near Hildesheim
  8. ↑ a b Fight against floods: disaster alarm and sandbags at ndr.de from July 28, 2017
  9. ↑ High water alarm after continuous stormy rain at RP Online from July 26, 2017
  10. ↑ In Lower Saxony, the levels on T-Online are still rising from July 27, 2017
  11. ↑ Lower Saxony starts emergency aid of 50 million euros for flood victims at topagrar-online on August 14, 2017
  12. ↑ Floods and continuous rain More rain than in the whole month ( memento of the original from June 13, 2018 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. at mdr.de on July 26, 2017 @1@ 2Template: Webachiv / IABot / www.mdr.de
  13. ↑ Continuous rain causes small rivers to rise ( memento of the original from June 13, 2018 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. at mdr.de on July 25, 2017 @1@ 2Template: Webachiv / IABot / www.mdr.de
  14. ↑ Floods in Central Germany ( Memento of the original from June 15, 2018 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. at mdr.de on July 25, 2017 @1@ 2Template: Webachiv / IABot / www.mdr.de
  15. ↑ Floods after continuous rain in Thuringia ( Memento of the original from June 15, 2018 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. at mdr.de on July 26, 2017 @1@ 2Template: Webachiv / IABot / www.mdr.de