The Pregolya or Pregola (russian: Прего́ля; german: Pregel; lt, Prieglius; pl, Pregoła) is a
river in the
Russian
Kaliningrad Oblast exclave.
Name
A possible ancient name by
Ptolemy of the Pregolya River is Chronos (from Germanic *''hrauna'', "stony"), although other theories identify Chronos as a much larger river, the
Nemunas.
The oldest recorded names of the river are ''Prigora'' (1302), ''Pregor'' (1359), ''Pregoll, Pregel'' (1331), ''Pregill'' (1460). Georg Gerullis connected the name with Lithuanian ''prãgaras'', ''pragorė̃'' ("abyss") and the Lithuanian verb ''gérti'' ("drink"). Vytautas Mažiulis instead derived it from ''spragė́ti'' or ''sprógti'' ("burst") and the suffix -''ara'' ("river").
[http://journals.lki.lt/actalinguisticalithuanica/article/download/856/947/ ]
Overview
It starts as a
confluence
In geography, a confluence (also: ''conflux'') occurs where two or more flowing bodies of water join to form a single channel. A confluence can occur in several configurations: at the point where a tributary joins a larger river (main stem); o ...
of the
Instruch and the
Angrapa
The Angrapa (, , , ) is a river that begins in northeastern Poland and ends in the Kaliningrad Oblast of Russia. Originating in Lake Mamry, it joins the 101-km-long Instruch at a point near Chernyakhovsk – variously assessed as lying 140, 169 ...
and drains into the
Baltic Sea through the
Vistula Lagoon. Its length under the name of Pregolya is 123 km, 292 km including the
Angrapa
The Angrapa (, , , ) is a river that begins in northeastern Poland and ends in the Kaliningrad Oblast of Russia. Originating in Lake Mamry, it joins the 101-km-long Instruch at a point near Chernyakhovsk – variously assessed as lying 140, 169 ...
. The
basin has an area of 15,500 km
2. The average flow is 90 m
3/s.
Euler's
Seven Bridges of Königsberg problem was based on the bridges crossing the river in
Königsberg (now
Kaliningrad).
Cities and towns
*
Chernyakhovsk
*
Znamensk
*
Gvardeysk
*
Kaliningrad
Tributaries
*
Pissa
*
Lava/Łyna
*
Angrapa
The Angrapa (, , , ) is a river that begins in northeastern Poland and ends in the Kaliningrad Oblast of Russia. Originating in Lake Mamry, it joins the 101-km-long Instruch at a point near Chernyakhovsk – variously assessed as lying 140, 169 ...
*
Instruch
See also
*
List of rivers of Russia
*
Bridges of Konigsberg problem
References
Rivers of Kaliningrad Oblast
{{Russia-river-stub