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Water » River » River, bay

River Vecgauja in the Village CarnikavaRiver mouth of Gauja in a Foggy Autumn Day
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Seashore near the River mouth of Gauja, Rīgas jūras līcis, Gauja, Liedags, Ainava, Migla

Seashore near the River mouth of Gauja

Code: A-118-18-LM
Author: Līga Matsone
Photo taken on October 21, 2018
S 2000 x 1333 px
2.36 MB
M 3000 x 2000 px
25.4 x 16.93 cm / 300 dpi
L 3888 x 2592 px
32.92 x 21.95 cm / 300 dpi
9.6 MB
XL 5184 x 3456 px
43.89 x 29.26 cm / 300 dpi
14.9 MB

The Gulf of Riga, Bay of Riga, or Gulf of Livonia (Latvian: Rīgas jūras līcis, Estonian: Liivi laht, Russian: Рижский залив) is a bay of the Baltic Sea between Latvia and Estonia.

The island of Saaremaa (Estonia) partially separates it from the rest of the Baltic Sea. The main connection between the gulf and the Baltic Sea is the Irbe Strait.

The Gulf of Riga, as a sub-basin of the Baltic, also includes the Väinameri Sea in the West Estonian archipelago.

Surface area    18,000 km2 (6,900 sq mi)
Average depth    26 m (85 ft)
Max. depth    54 m (177 ft)
Water volume    424 km3

Geography
Extent
The International Hydrographic Organization defines the Gulf of Riga's western limit as "A line running from Lyser Ort (57°34'N), in Latvia, to the South extreme of Œsel Island, through this island to Pammerort (22°34'E), thence to Enmast Point, the S extreme of Dagö, through Dagö to Takhkona Point, the North extreme thereof, and on to Spithamn Point in Estonia".

Islands
Major islands in the gulf include Saaremaa, Kihnu and Ruhnu, which are all controlled by Estonia. Kihnu covers an area of 16.4 square kilometres (6.3 sq mi). Saaremaa island is responsible for the brackish water of the Gulf of Riga, as it is partially "shielded" from the Baltic Sea.

Cities
Notable cities around the gulf include Riga, Pärnu, Jūrmala, and Kuressaare. The main rivers flowing into the gulf are Daugava, Pärnu, Lielupe, Gauja, and Salaca.

Salinity
The freshwater runoff entering the Baltic sea accounts for two percent of its volume.[3] A narrow connection to the North Sea means that water stays in the Baltic for an average of 30 years. These two characteristics work to make the Baltic Sea one of the largest brackish bodies of water in the world. The Gulf of Riga has an average salt concentration for the Baltic Sea, which is around six to ten parts per thousand. Freshwater has a concentration of 0.5 parts per thousand, and seawater is about 30 parts per thousand. A saline stratification layer is found at a depth of approximately 70 metres (230 ft).

Winter
In winter, most or all of the Bay usually freezes. This is due to low salinity and the calming effect of the partial closure of the entrance of the gulf. During the winter, many people walk over the bay. The thickest recorded ice was 90 centimetres (35 in) thick in the winter of 1941–42. Ice hole fishing has been a traditional source of winter food, and remains a common activity. The ice usually melts between March and April. In late March 2013, when the ice started to melt, 200 people had to be rescued from ice floes.
en.wikipedia.org

 

Seashore near the River mouth of Gauja

Code: A-118-18-LM
Author: Līga Matsone
Photo taken on October 21, 2018
S 2000 x 1333 px
2.36 MB
M 3000 x 2000 px
25.4 x 16.93 cm / 300 dpi
L 3888 x 2592 px
32.92 x 21.95 cm / 300 dpi
9.6 MB
XL 5184 x 3456 px
43.89 x 29.26 cm / 300 dpi
14.9 MB
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