Caspian Depression in the context of "Lowland"

Kalmykia, officially the Republic of Kalmykia, is a republic of Russia, located in the Volga region of European Russia. The republic is part of the Southern Federal District, and borders Dagestan to the south and Stavropol Krai to the southwest; Volgograd Oblast to the northwest and north and Astrakhan Oblast to the north and east; Rostov Oblast to the west and the Caspian Sea to the east. Through the Caspian Depression, the Kuma river forms Kalmykia's natural border with Dagestan. Kalmykia is the only polity within Europe where the Dharmic religion of Buddhism is the predominant religion; the majority of Kalmyk people are Vajrayana Tibetan Buddhists of the Gelug and Kagyu lineages.

The Kalmykia republic covers an area of 76,100 square kilometres (29,400 square miles), with a small population of about 275,000 residents. The republic of Kalmykia is home of the Kalmyks, a people of Oirat Mongolian origin who are mainly of Tibetan Buddhist faith. The capital of the republic is the city of Elista.

Astrakhan (Russian: Астрахань, IPA: [ˈastrəxənʲ] ) is the largest city and administrative centre of Astrakhan Oblast in southern Russia. The city lies on two banks of the Volga, in the upper part of the Volga Delta, on eleven islands of the Caspian Depression, 100 km (62 mi) from the Caspian Sea, with a population of 475,629 residents at the 2021 Census. At an elevation of 28 meters (92 ft) below sea level, it is the lowest city in Russia.

Astrakhan was formerly the capital of the Khanate of Astrakhan (a remnant of the Golden Horde) of the Astrakhan Tatars, and was located on the higher right bank of the Volga, eleven kilometres (6.8 mi) from the present-day city. Situated on caravan and water routes, it developed from a village into a large trading centre, before being conquered by Timur in 1395 and captured by Ivan the Terrible in 1556 and in 1558 it was moved to its present site.

The Volga Delta is the largest river delta in Europe and occurs where Europe's largest river system, the Volga River, drains into the Caspian Sea in Russia's Astrakhan Oblast, north-east of the republic of Kalmykia. The delta is located in the Caspian Depression—the far eastern part of the delta lies in Kazakhstan. The delta drains into the Caspian approximately 60 km (37 mi) downstream from the city of Astrakhan.

The Volga delta has grown significantly in the 20th century because of changes in the level of the Caspian Sea. In 1880, the delta had an area of 3,222 km (1,244 sq mi). Today the Volga Delta covers an area of 27,224 km (10,511 sq mi) and is approximately 160 km (100 mi) across. It has a classical "delta pattern". The delta lies in the arid climate zone, characterized by very little rainfall. The region receives less than one inch of rainfall in January and July in normal years. Strong winds often sweep across the delta and form linear dunes. Along the front of the delta, one will find muddy sand shoals, mudflats, and coquina banks.

The Emba (Kazakh: Ембі Embı or Жем Jem, Russian: Эмба) in west Kazakhstan rises in the Mugodzhar Hills and flows across the Sub-Ural Plateau and Caspian Depression into the Caspian Sea. It is 712 kilometres (442 mi) long, and has a drainage basin of 40,400 square kilometres (15,600 sq mi). It flows through the north of the Ust-Urt plateau, and reaches the Caspian by a series of shallow lagoons, which were navigable in the 18th century. The lower course traverses an area of salt domes and the petroleum-rich Emba fields. It is sometimes regarded as a definition for the natural boundary between Europe and Asia.

In its upper course, the Emba is a small river, its valley barely over 2,000 metres (6,600 ft) wide. Lower down, after the waters of the Temir River flow into it, the Emba's valleys widen to almost 7 kilometres (4 mi). The Emba flows in a single channel, only breaking off into little arms in places. But around 100 kilometres (62 mi) before it enters the Caspian Sea, it breaks off in places to form several lakes, which are connected to each other through slender channels that only run during flooding. The Emba is a snow-fed river. It freezes over in winter, a process that begins in November and lasts until March.

The Aral–Caspian Depression is a lowland depression straddling Europe and Asia around the Aral Sea and Northern Caspian Sea. The most northern part is called the Caspian Depression. The desert part to the east of the Caspian Depression and Caspian is called the Turan Depression. In Azerbaijan, the Kura-Aras Lowland is part of the Aral–Caspian Depression. Its parts lie in Azerbaijan, Russia, Kazakhstan, Uzbekistan, and Turkmenistan.

The Kuma (Russian: Кума́) is a river in the North Caucasus region of southern Russia. It flows northeast into the Caspian Sea. It is 802 kilometres (498 mi) long and has a drainage basin of 33,500 square kilometres (12,900 sq mi). Its source is in the Greater Caucasus, in the republic Karachay-Cherkessia, west of Kislovodsk. It flows in a northeastern direction, through Stavropol Krai (towns Mineralnye Vody, Zelenokumsk, Budyonnovsk, Neftekumsk) and further east through the Caspian Depression as the natural border between the Kalmykia and Dagestan republics of Russia. That part of the Kuma's valley forms the eastern part of the Kuma–Manych Depression, separating the East European Plain from the Caucasus region. The Kuma flows into the Kizlyar Gulf of the Caspian Sea near the border between Dagestan and Kalmykia.

Most of the rivers that flow north from the Caucasus Mountains and into Terek–Kuma Lowland are caught by the Kuban and Terek. It rises between the basins of those two rivers, so the Kuma is mainly a steppe river. It is much used for irrigation.

The Terek-Kuma Lowland (Russian: Терско-Кумская низменность) is the lowland in the southwestern part of the Caspian Depression in southern Russia, in Republic of Dagestan, Stavropol Krai and Chechen Republic. It has altitudes between 28 m below sea level and 100 m above sea level, constituting the eastern part of Ciscaucasia.