Island "Tatyshev". Big Circle.

The Kacha (Russian: Ка́ча) is a river in Krasnoyarsk Krai, Russia. The Turkic name of the river is Izyr-Su, and it has been suggested that the Russian name is derived from Izyr-Kichi "Izyr people", the self-name of the Turkic people that inhabited the river valley and adjacent lands.The length of the Kacha is 103 kilometers (64 mi); the area of its drainage basin is 1,280 square kilometers (490 sq mi).