The Upa (, ) is a river in
Tula Oblast,
Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
, and one of the main
tributaries
A tributary, or an ''affluent'', is a stream or river that flows into a larger stream ('' main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which the ...
of the
Oka.
The river is long, and has a
drainage basin
A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, ...
of .
[«Река УПА»]
Russian State Water Registry The city of
Tula is situated on its banks. The name of the river is of
Baltic origin. This is probably one of the oldest baltic
hydronims.
Lithuanian word "upė", latvian word "upe" in English means "river", in russian means "река";
[E.M. Pospelov, ''Geograficheskie nazvaniya mira'' (Moscow: Russkie slovari, 1998), p. 423: "cf. Lithuanian ''ùpė, upìs, upỹs,'' Latvian ''upe'' 'river, stream.'"]
References
Rivers of Tula Oblast
{{Russia-river-stub