The Satis () is a river in central

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 ...

, a right

tributary 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 they ...

of the

Moksha ''Moksha'' (; , '), also called ''vimoksha'', ''vimukti'', and ''mukti'', is a term in Jainism, Buddhism, Hinduism, and Sikhism for various forms of emancipation, liberation, '' nirvana'', or release. In its soteriological and eschatologic ...

.«Река САТИС»
Russian State Water Registry

Geography

The source of the river is 5 km northeast of Satis, Pervomaysk, Nizhny Novgorod Oblast. 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 . The width of the river is about 2–3 meters near the village of Satis (Pervomaisky District), which is a few kilometres from the source. The depth at this point is about 0.3 - 0.5m. The flow rate is about 0.8 m/s and the water remains clear. The river bed has sediment of pebbles and sand and the shores are lined with trees. The nature of the terrain remains almost uniform until the city of

Sarov Sarov () is a closed city, closed town in Nizhny Novgorod Oblast, Russia. It was known as Gorkiy-130 (Горький-130) and Arzamas-16 (), after a (somewhat) nearby town of Arzamas,SarovLabsCreation of Nuclear Center Arzamas-16/ref> from 194 ...

. The water is characterized by a fairly high content of sulphates and

calcium salts Although most compounds are referred to by their IUPAC systematic names (following IUPAC nomenclature), traditional names have also been kept where they are in wide use or of significant historical interests. A Ac * Actinium(III) chlorid ...

. The soil is rich in limestone and

limonite Limonite () is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as , although this is not entirely accurate as the ratio of oxide to hydroxide can vary qu ...

. The presence of the latter is manifested in the water's red hue after heavy rain. The water is cold even on hot summer days owing to the many springs that feed it. The presence of underwater springs largely explains the river does not freeze during the winter period in some areas.

Fish

The

ichthyofauna A fish (: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits. Fish can be grouped into the more basal jawless fish and the more common jawed fish ...

of the river is diverse. The following fish species inhabit the Satis, including its tributaries and other bodies of water in the river basin: *

Chub Chub is a common fish name. It pertains to any one of a number of ray-finned fish in several families and general. In the UK, the term ''chub'' usually refers to the species '' Squalius cephalus''. In addition, see sea chub. In family Cyprinid ...

Minnow Minnow is the common name for a number of species of small freshwater fish, belonging to several genus, genera of the family Cyprinidae and in particular the subfamily Leuciscinae. They are also known in Ireland as wikt:pinkeen, pinkeens. While ...

Ruff Ruff may refer to: Places *Ruff, Virginia, United States, an unincorporated community *Ruff, Washington, United States, an unincorporated community Other uses *Ruff (bird) (''Calidris pugnax'' or ''Philomachus pugnax''), a bird in the wader famil ...

Dace A dace is a small fish that can be one of many different species. The unmodified name is usually a reference to the common dace (''Leuciscus leuciscus''). This, like most fish called "daces", belongs to the family Leuciscidae, mostly in subfami ...

Crucian Carp The crucian carp (''Carassius carassius'') is a medium-sized member of the common carp family Cyprinidae. It occurs widely in northern European regions. Its name derives from the Low German ''karusse'' or ''karutze'', possibly from Medieval Lat ...

* Crucian Carp Silver (Carassius Gibelio) *

Carp The term carp (: carp) is a generic common name for numerous species of freshwater fish from the family (biology), family Cyprinidae, a very large clade of ray-finned fish mostly native to Eurasia. While carp are prized game fish, quarries and a ...

Rudd ''Scardinius'' is a genus of freshwater ray-finned fishes belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related species. The fishes in this genus are commonly called rudds. Locally, the name "rudd" without ...

Bream Bream (, ) are species of freshwater fish belonging to a variety of genera including '' Abramis'' (e.g., ''A. brama'', the common bream), '' Ballerus'', '' Blicca'', '' Brama'', '' Chilotilapia'', '' Etelis'', '' Lepomis'', '' Gymnocranius'', ...

Tench The tench or doctor fish (''Tinca tinca'') is a freshwater, fresh- and brackish water, brackish-water fish of the order Cypriniformes found throughout Eurasia from Western Europe including Great Britain, Britain and Ireland east into Asia as far ...

Burbot The burbot (''Lota lota''), also known as bubbot, mariah, loche, cusk, freshwater cod, freshwater ling, freshwater cusk, the lawyer, coney-fish, lingcod, or eelpout, is a species of coldwater ray-finned fish native to the subarctic regions of ...

* Roach *

Perch Perch is a common name for freshwater fish from the genus ''Perca'', which belongs to the family Percidae of the large order Perciformes. The name comes from , meaning the type species of this genus, the European perch (''P. fluviatilis'') ...

* Chinese sleeper(rus. ротан) * Bleak *

Loach Loaches are ray-finned fishes of the suborder Cobitoidei. They are freshwater, benthic (bottom-dwelling) fish found in rivers and creeks throughout Eurasia and North Africa, northern Africa. Loaches are among the most diverse groups of fish; the ...

* Pike * Amur Sleeper *

Orfe The ide (''Leuciscus idus''), or orfe, is a species of freshwater Actinopterygii, ray-finned fish belonging to the Family (biology), family Leuciscidae. The ide is found in larger rivers, ponds, and lakes across Northern Europe and Asia. It has ...

Representatives of the

of Moksha are found in the lakes located on the territory of the Mordovia Reserve: Sheatfish, Pikeperch, etc. In general, the dominant species are Roach, Gudgeon, Perch and Bleak - Oxyphilic species, which indicates favourable abiotic and biotic regimes. The population of species that are sensitive to pollution, such as Gudgeon, Bleak, Chub, Ruff, and Dace has increased. This indicates the ecological recovery processes of the river are succeeding.

References

{{DEFAULTSORT:Satis, River Rivers of Nizhny Novgorod Oblast