The Narva, formerly also Narwa or Narova, is a river in northeastern Estonia flowing 77 kilometres (48 mi) north from Lake Peipus to the Baltic Sea. It is the largest Estonian river by discharge and forms part of the Estonia–Russia border.
The river gives its name to the archaeological (Neolithic) Narva culture, as well as the city of Narva. Narva is the third most populous urban area in Estonia and faces the Russian town of Ivangorod across the river.
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The Velikaya (Russian: Вели́кая) is a river in Novosokolnichesky, Pustoshkinsky, Sebezhsky, Opochetsky, Pushkinogorsky, Ostrovsky, Palkinsky, and Pskovsky Districts of Pskov Oblast, as well as in the city of Pskov in Russia. It is the largest tributary of Lake Peipus and belongs to the drainage basin of the Narva. It is 430 kilometres (270 mi) long, and the area of its basin 25,200 square kilometres (9,700 sq mi). The name of the river literally means "Grand" or "Great" in Russian. The towns of Opochka, Ostrov and Pskov are located on the banks of the Velikaya. The principal tributaries of the Velikaya are the Alolya (right), the Issa (left), the Sorot (right), the Sinyaya (left), the Utroya (left), the Kukhva (left), the Cheryokha (right), and the Pskova (right).
The source of the Velikaya is located in the Bezhanitsy Hills in the northwest of Novosokolnichesky District. The river flows south through a system of lakes to Lake Veryato, where it turns west. It accepts the Alolya from the right and gradually turns north, passing through the town of Opochka. Northwest of the urban-type settlement of Pushkinskiye Gory it turns west, accepts the Sinyaya from the left and turns north. In the city of Pskov the Velikaya accepts the Pskova from the right and turns northwest, forming a river delta as it enters Lake Peipus.
The Cheryokha (Russian: Черёха) is a river in Ostrovsky, Porkhovsky, and Pskovsky Districts, and in the city of Pskov of Pskov Oblast in Russia. It is a right tributary of the Velikaya and belongs to the basin of the Narva. It is 145 kilometres (90 mi) long, and the area of its basin 3,230 square kilometres (1,250 sq mi). The main tributary is the Keb (right).
The source of the Cheryokha is Lake Chereshno, located in a swampy area southeast of the town of Ostrov. The river flows northwest, enters Porkhovsky District, and close to the border with Pskovsky District sharply turns west. On a short stretch it makes the border between Porkhovsky and Pskovsky Districts. In 8.7 kilometres (5.4 mi) upstream from the mouth the Cheryokha accepts the Keb, its biggest tributary, from the right. The last stretch of Cheryokha constitutes the border between the city of Pskov (north) and Pskovsky District (south). The Cheryokha joins the Velikaya in the southern end of the city of Pskov.
The Pskova (Russian: Пскова) is a river in Strugo-Krasnensky and Pskovsky Districts of Pskov Oblast, as well as in the city of Pskov in Russia. It is a right tributary of the Velikaya and belongs to the basin of the Narva. It is 102 kilometres (63 mi) long, and the area of its basin 1,000 square kilometres (390 sq mi). The city of Pskov is located on the banks of the Pskova. The tributaries include: the Pskovitsa and the Drebyonka (left), as well as the Toroshinka and the Milyovka (right).
The source of the Pskova is in the western part of Strugo-Krasnensky District. The Pskova flows south, and a stretch of the river forms the border between Strugo-Krasnensky and Pskovsky Districts. The Pskova departs from the border back into Strugo-Krasnensky District, turns southwest and enters Pskovsky District. In the city of Pskov, it turns west and joins the river Velikaya. The Pskov Kremlin is located between by the mouth of the Pskova.