Daugava

Not to be confused with Northern Dvina.

For other uses, see Daugava (disambiguation) and Dvina.

Daugava Western Dvina, Template:Lang-ru, Template:Lang-be ([zaˈxodnʲaja dzʲvʲiˈna]), Template:Lang-liv, Template:Lang-et, Template:Lang-de
The drainage basin of the Daugava
Location
Country	Belarus, Latvia, Russia
Physical characteristics
Source
• location	Valdai Hills, Russia
• elevation	221 m (725 ft)
Mouth
• location	Gulf of Riga, Baltic Sea
• coordinates	57°3′42″N 24°1′50″E
• elevation	0 m (0 ft)
Length	1,020 km (630 mi)
Basin size	87,900 km2 (33,900 sq mi)
Discharge
• average	678 m3/s (23,900 cu ft/s)

Daugava (Template:Lang-ltg) or Western Dvina (Template:Lang-ru; Template:Lang-be; Template:Lang-et; Template:Lang-fi) is a large river rising in the Valdai Hills of Russia that flows through Belarus then Latvia into the Gulf of Riga of the Baltic Sea. It rises close to the source of the Volga. Its length is 1,020 km (630 mi), of which 325 km (202 mi) are in Russia. It is a westward-flowing river, tracing out a great curve towards its south which means it passes through northern Belarus.

Latvia's capital, Riga bridges the estuary four times, lying on both banks, the city centre being 15 kilometres (9.3 mi) from the mouth and being a significant port.

Geography

The total catchment area of the river is 87,900 km² (33,900 sq mi), 33,150 km² (12,800 sq mi) of which are within Belarus.

Tributaries

The following rivers are tributaries to the river Daugava (from source to mouth):

• Left: Mezha, Kasplya, Dysna, Laucesa
• Right: Usvyacha, Palata, Drysa, Dubna, Aiviekste, Pērse, Ogre

Etymology

Daugava flowing through Riga in Latvia

According to Max Vasmer's Etymological Dictionary, the toponym Dvina clearly cannot stem from a Uralic language, and it possibly comes from an Indo-European word which used to mean river or stream. The name Dvina resembles strongly Danuvius which itself derived from the Proto-Indo-European *dānu, "large river".

The Finno-Ugric names Vēna (Livonian), Väinajogi (Estonian) and Väinäjoki (Finnish) all stem from Proto-Finnic *väin, "a large, peacefully rolling river".

Port of Riga on the Daugava river

Environment

The river began experiencing environmental deterioration in the era of Soviet collective agriculture (producing considerable adverse water pollution runoff) and a wave of hydroelectric power projects.

Cities, towns and settlements

Russia

Andreapol, Zapadnaya Dvina and Velizh.

Belarus

Ruba, Vitebsk, Beshankovichy, Polotsk with Boris stones strewn in the vicinity, Navapolatsk, Dzisna, Verkhnedvinsk, and Druya.

Latvia

Krāslava, Daugavpils, Līvāni, Jēkabpils, Pļaviņas, Aizkraukle, Jaunjelgava, Lielvārde, Kegums, Ogre, Ikšķile, Salaspils and Riga.

History

Daugava sunset in Riga.

The Swedish army bombarding the fortress of Dünamünde at the Daugava's estuary in Latvia.

Humans have settled at the mouth of the Daugava and around the other shores of the Gulf of Riga for millennia, initially participating in a hunter-gatherer economy and utilizing the waters of the Daugava estuary as fishing and gathering areas for aquatic biota. Beginning around the sixth century AD, Viking explorers crossed the Baltic Sea and entered the Daugava River, navigating upriver into the Baltic interior.

In medieval times the Daugava was an important area of trading and navigation - part of the trade route from the Varangians to the Greeks - for transport of furs from the north and of Byzantine silver from the south. The Riga area, inhabited by the Finnic-speaking Livs, became a key element of settlement and defence of the mouth of the Daugava at least as early as the Middle Ages, as evidenced by the now destroyed fort at Torņakalns on the west bank of the Daugava at present day Riga. Since the Late Middle Ages the western part of the Daugava basin has come under the rule of various peoples and states; for example the Latvian town of Daugavpils, located on the western Daugava, variously came under papal rule as well as Slavonic, Polish, German and Russian sway until restoration of the Latvian independence in 1990 at the end of the Cold War.

Water quality

Upstream of the Latvian town of Jekabpils the pH has a characteristic value of about 7.8 (slight alkaline); in this reach the calcium ion has a typical concentration of around 43 milligrams per liter; nitrate has a concentration of about 0.82 milligrams per liter (as nitrogen); phosphate ion is measured at 0.038 milligrams per liter; and oxygen saturation was measured at eighty percent. The high nitrate and phosphate load of the Daugava is instrumental to the buildup of extensive phytoplankton biomass in the Baltic Sea; other European rivers contributing to such high nutrient loading of the Baltic are the Oder and Vistula Rivers.

In Belarus, water pollution of the Daugava is considered moderately severe, with the chief sources being treated wastewater, fish-farming and agricultural chemical runoff (e.g. herbicides, pesticides, nitrate and phosphate).

Further reading

• Richard C. Frucht; Aldis Purs (2005). Latvia. ABC-CLIO. p. 115. ISBN 9781576078006. Retrieved 2009-08-01. {{cite book}}: |work= ignored (help)
• Francis W. Carter and David Turnock. 2002. Environmental problems of East Central Europe. 442 pages Google eBook

External links

• Daugava River photos at flickr