Carlsfeld dam
| Carlsfeld dam | |||||||||
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| Coordinates | 50 ° 25 '12 " N , 12 ° 35' 51" E | ||||||||
| Data on the structure | |||||||||
| Construction time: | 1926-1929 | ||||||||
| Height above valley floor: | 24.3 m | ||||||||
| Height above foundation level : | 31.8 m | ||||||||
| Height of the structure crown: | 905.55 m | ||||||||
| Building volume: | 29 000 m³ | ||||||||
| Crown length: | 206 m | ||||||||
| Crown width: | 4.7 m | ||||||||
| Radius of curvature : | 160 m | ||||||||
| Data on the reservoir | |||||||||
| Altitude (at congestion destination ) | 903.5 m | ||||||||
| Water surface | 46.7 ha | ||||||||
| Storage space | 3.04 million m³ | ||||||||
| Total storage space : | 3.1 million m³ | ||||||||
| Catchment area | 5.4 km² | ||||||||
| Design flood : | 35 m³ / s | ||||||||
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The Carlsfeld dam , also known as Weiterswiese or Wilzschtalsperre , is the highest dam in Saxony . It is located within the Eibenstock city area near the Carlsfeld district . It is also the highest drinking water dam and, after the Schluchsee, the second highest dam in Germany. The dammed body of water is the Wilzsch , a tributary of the Zwickauer Mulde .
Construction and construction
The dam of the dam Carl field is a curved gravity dam from rubble masonry after the intze principle . The dam was built between 1926 and 1929 by the Eduard Steyer company from Leipzig. The construction had to the storage space lying scattered settlement Next meadow with their 8 houses soft, all the buildings were demolished. The construction of the dam was discussed in the Saxon state parliament in 1927. It was about the housing of the construction workers in barracks, the employment of unemployed family fathers from the Upper Ore Mountains, mileage allowance and the provision of tools and work clothes.
use
The dam is used for drinking water supply and flood protection . The water hardness is 0.5 degrees dH - soft starts at a value below 7 degrees dH -. It has the softest water of all Saxon dams. The annual mean depth of view is 100 centimeters, the smallest of all in Saxony. Below the dam is the waterworks , from which the treated water can flow freely downhill to the supply area. An infinitely height-adjustable extraction system makes it possible to divert the water for drinking water treatment at the water level where it is of the best quality.
The Carlsfeld waterworks was built between 1934 and 1936 to supply Schönheide with drinking water. After extensions in the 1960s, Eibenstock was connected. From 1997 to 2000 the waterworks was renovated. Thereafter, the supply was expanded. In addition to the aforementioned, Johanngeorgenstadt and Schwarzenberg , a total of 33,000 inhabitants in 11 municipalities, are supplied with drinking water.
Rainfall
The average annual rainfall in the area of the dam is 1200 millimeters. In the period 1961/1990 1219 mm and mean highest snow cover 121 cm. The absolute highest snow cover was in March 1988 - 255 cm.
Prevention of water pollution
Humic substances that arise in the moors and forests above the dam are carried along by the Wilzsch. Under certain circumstances - with heavy precipitation and during the snowmelt - the humic content increases sharply. Since the 1990s, the concentration has increased. The Saxon dam administration does not consider this pollution to be harmful to health and describes it as natural inputs that discolor the water. However, these could "lead to quality problems and have to be laboriously removed in the waterworks". The brown color of the water and the associated low visibility are also caused by the humic pollution. In order to stabilize the raw water quality and to be able to intercept the peaks of humic matter in the water feeding the dam, a retention basin with a capacity of 44,000 cubic meters was built within a year at the dam's root. For this purpose, a 200-meter-long and 30-meter-wide dam was built on the Wilzsch, which separates the water from the dam, a diversion ditch and a pipeline with a diameter of 30 centimeters on the bottom of the dam. In the event of a high load of humic substances, the water flowing into the dam is routed via a distributor structure into this retention basin, from where it flows via the pipeline through the reservoir and the dam wall and back into the Wilzsch below the dam. According to the state dam administration, there was already a significant reduction in the amount of humic matter during the first damming after the construction of the new facilities. The 1,100-meter-long pipeline used to divert the humid-contaminated water is to be extended so that this water can flow as far as the Glashüttenbach and then flow over this creek and the Große Bockau to the Zwickauer Mulde and thus not pollute the Eibenstock dam . The planning approval decision of the Chemnitz regional directorate for this project is expected in 2016.
Swimming and other recreational sports are not allowed in the reservoir, hiking around the reservoir is possible. The top of the wall is also accessible.
Redevelopment
Between 1997 and 2000 the dam was completely renovated. At the eastern end of the dam is a model of the wall structure as it was made during the renovation. On June 22, 1998, a windpipe passed over the construction site of the dam and the adjacent forest . All trees were knocked over on a 6 km long aisle . A plaque near the dam commemorates this event.
Operational information
Up-to-date information on the operation of the dam, such as water levels, inflow and outflow quantities, can be found on the website of the Saxon dam administration.
Mining history in the area of the dam
In the course of the construction work, the water level was lowered by a few meters in the spring of 2010 and the remains of a historic tin soap were documented. Wood processed during renovation work had already been discovered at the end of the 1990s. A small, nameless tributary of the Große Wilzsch had changed its bed and uncovered the site. In the meantime, some tree trunks, posts, boards and built-in trenches have been documented here, which probably served to regulate the watercourse. Particularly noteworthy is the discovery of a wooden box made of split planks 2.5 × 1.0 × 0.5 m in size. The fine sediments found in it suggest an interpretation as a mud ditch for settling the finest grain sizes. Currently, the facility, mentioned in historical sources as "Nixseiffen", is classified as around 1500.
literature
- Dieter Bock: Carlsfeld dam. In: Erzgebirgische Heimatblätter . 4/2009, ISSN 0232-6078 , pp. 2-4.
- The mining landscape of Schneeberg and Eibenstock (= values of the German homeland . Volume 11). 1st edition. Akademie Verlag, Berlin 1967, p. 176 f.
See also
Web links
- Information from the Saxon state dam administration about the dam
- Report of the state dam administration on the commissioning of the retention basin in 2010
- Flyer of the dam administration from August 2013 about the dam
Individual evidence
- ↑ Minutes of April 26, 1927, p. 852 Digitalisat at Landtag protocols.Sachsendigital.de
- ^ Annual report of the Saxon state dam administration for 2005, p. 40
- ↑ a b Flyer of the Saxon state dam administration from August 2013 [1]
- ↑ K. Grunewald and W. Schmidt: Bilateral studies and model-based forecasts of humic substances in surface waters due to changed ecosystem conditions and their relevance for drinking water production , TZW-Technologiezentrum Wasser Karlsruhe / Dresden, Technische Universität Dresden, Institut für Geographie, Dresden 2005, p. 21 ( Digitized version ), accessed on June 23, 2020
- ↑ International Commission for the Protection of the Elbe: The Elbe and its catchment area - a geographic, hydrological and water management overview , Chapter 4.6 - The Mulde, Magdeburg 2005, p. 107 Download from Halle University Library
- ↑ a b c d e Press release of the State Dam Administration Saxony 57/2010 of December 9, 2010 [2] , accessed on October 4, 2015
- ^ Annual report of the Saxon state dam administration for 2005, p. 6
- ↑ Information from the Saxon dam administration [3] , accessed on October 3, 2015
- ↑ Presentation of the construction company [ Archived copy ( memento of the original from October 4, 2015 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. ], accessed October 3, 2015
- ^ Annual report of the Saxon state dam administration for 2011, p. 7
- ↑ Mail information dated October 7, 2015 from the Zwickauer Mulde / Obere Weisse Elster plant of the Saxon state dam administration
- ↑ [4]
- ^ Archeology in Saxony - A historical tin soap near Carlsfeld, Erzgebirge , accessed on February 24, 2011
