Trap
A latch (also called a contactor ) is a protective board or a small sluice , depending on the design . In water management, a trap is used to regulate the amount of water, for example when discharging river or stream water into canals. In order to avoid silting up of the channels of the adjustable trap, a sand trap for separating entrained solid substances is often connected upstream. In Freiburg , the sand trap was used to extract sand when the Dreisam water was diverted into the industrial canal until the 19th century. If a channel is divided at one point with several traps, it is called a divider. The advantage of traps lies in the possibility of not allowing feeder trenches to become too long.
Traps are or were often to be found in the Black Forest for irrigation of meadows , while cascades were preferred in Siegerland . Since traps reduce the flow of water for users lying downstream, the opening and closing of this lock device are usually regulated depending on the water supply or also time. In Freiburg this task falls to the Runzmeister . Padlocks were used to protect against unauthorized opening . In the spring of 1850 , the poet Joseph Victor von Scheffel worked on the case of an unauthorized lock-up trap during his time as a legal intern at the district office in Säckingen .
The term Stellfalle seems to be used mainly in southwest Germany. The Freiburg entrepreneur Carl Mez had to hand over the key to the lock to the water and road construction office in 1883 after he was accused of having used the same to the disadvantage of the Freiburg Bächle "according to his own good will and perhaps to his own advantage".
literature
- Gerhard Endriss: The artificial irrigation of the Black Forest and the adjacent areas , in: Reports of the Natural Research Society of Freiburg im Breisgau, Volume 42, Issue 1, 1952, pages 77-113 online
Individual evidence
- ↑ Trap . In: Heinrich August Pierer , Julius Löbe (Hrsg.): Universal Lexicon of the Present and the Past . 4th edition. tape 16 . Altenburg 1863, p. 754 ( zeno.org ).
- ↑ Endriss, page 103
- ↑ a b Endriss, page 82
- ↑ Endriss, page 87
- ↑ Korinna Thiem: The historical landscape analysis as a method for river assessment using the example of the Münstertal in the Black Forest , dissertation, Institute for Land Care, Freiburg im Breisgau 2006, ISBN 3-933390-33-8
- ↑ Joachim Scheck, Magdalena Zeller: The Freiburg Bächle book: Walks on the history of the Freiburg Bächle and Runzen. Promo-Verlag, Freiburg, Br. 2008, ISBN 978-3-923288-69-4 , page 14