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Don River Spilling Sediments into Sea of Azov

47.0N 39.4E

July 12th, 2009 Category: Lakes, Rivers

Russia - June 21st, 2009

Russia - June 21st, 2009

The Sea of Azov is the shallowest sea in the world with an average depth of 13 metres (43 ft) and maximum depth of 15.3 metres (50 ft).

In places where silt has built up, such as Taganrog Bay (above, center), the average depth is less than 1 metre (3 ft). Here, sediments from the Don River (top right quadrant) can be seen spilling into the bay, coloring its waters green, and gradually swirling downwards into the rest of the sea.

The prevailing current in the sea is a counter-clockwise swirl. Salinity varies from 1 to 15 parts per thousand (compared to 30 to 40 for the oceans) across the sea and with season.

The Strait of Kerch links the Sea of Azov to the Black Sea (below).

Rivers and Lakes Near Volgograd, Russia – November 13th, 2009

48.7N 44.5E

November 13th, 2009 Category: Image of the day, Lakes, Rivers

Russia - October 7th, 2009

Russia - October 7th, 2009

Rivers and lakes seem to divide this image of Russian terrain into four square-like segments. The Volga River, from the center to the right edge, and the Volgograd Reservoir, from the center to the top edge, meet at an almost right-angle.  The reservoir, formed by a dam on the Volga, is thicker and darker blue.

On the other side of the image, the Don River flows across the upper left quadrant towards the center. From the center towards the bottom left is the Tsimlyansk Reservoir or Tsimlyanskoye Reservoir, another artificial lake, this time created by a dam on the Don River.

The rest of the land between the rivers seems mostly devoted to agriculture, with many rectangular fields visible. One large city, however, is visible as a grey area near the center. This is Volgograd, formerly called both Tsaritsyn and Stalingrad, the administrative center of Volgograd Oblast, Russia. It is 80 kilometres long, north to south, situated on the western bank of the Volga River.

The Dolgaya Spit Between Taganrog Bay and the Sea of Azov, Russia

46.6N 37.7E

November 6th, 2009 Category: Lakes

Russia - October 7th, 2009

Russia - October 7th, 2009

The Sea of Azov is bounded on the north by Ukraine (top), on the east by Russia (right) and on the west by the Crimean peninsula.

It is the shallowest sea in the world, with an average depth of 13 metres (43 ft) and maximum depth of 15.3 metres (50 ft), although some parts of it, such as Taganrog Bay (upper half of the image), the average depth is less than 1 metre (3 ft).

At the uppermost reaches of Taganrog Bay is the mouth of the Don River (top right), which can be seen here tinting the bay’s shallow waters green with sediments. Marking the lower limits of the bay, on the other hand, is the Dolgaya Spit.

The Dolgaya Spit is a sandy spit with a length of about 17 km and a width of about 500 m, appearing here as a thin, faint yellowish line extending northeastward from the peninsula in the center of the image.

Rivermouths Along the Sea of Azov and the Black Sea

45.0N 34.0E

September 21st, 2009 Category: Lakes, Rivers

Black Sea - August 16th, 2009

Black Sea - August 16th, 2009

The Dnieper River flows across Ukraine, first southeast then southwest, into the Black Sea. Further southwest along the shoreline, the mouth and delta of the Danube River can also be seen.

On the right, in Russia, the Don River spills through Taganrog Bay into the  Sea of Azov , which is in turn connected to the Black Sea through the Strait of Kerch.

Lying in the north central part of the Black Sea is the Crimean Peninsula, whose connection to the Ukrainian mainland via the Isthmus of Perekop is punctuated by the salty, marshy inlets of the Sivash Sea.

Both the Danube and the Dnieper can be seen releasing  some sediments into the Black Sea, although the concentration appears to heavier in the Sea of Azov near the mouth of the Don.

Russian Land Between Seas

49.1N 44.9E

July 31st, 2009 Category: Lakes, Rivers

Russia - June 21st, 2009

Russia - June 21st, 2009

The Russian land north of the Caucasus Mountains and the border with Georgian stretches between the Ukraine (left) and Kazakhstan (right).

The Volga River and Volgograd Reservoir form a right angle at the center, from the Volga carries on to its delta in the Caspian Sea (lower right). East of that right angle are a series of salt lakes, most of which lie in Kazakhstan.

Also near the center are the Don River and Tsimlyansk Reservoir, from which the Don continues until it reaches the Sea of Azov (lower left). The Sea of Azov then connects to the Black Sea via the Kerch Strait.

Sediments are present along the shores of all three seas, though they are particularly intense at the mouths of the Don and the Volga Rivers.