Why does the Yenisey River split into braided channels in the Tyva Basin?

In the Tyva Basin, the Yenisey River often splits into braided channels as it flows west from Kyzyl because it encounters gravelly shoals within its bed.1

Braided channels typically form when a river is subdivided by midstream bars of sand or gravel. These patterns are often associated with rivers that have weak banks, a high width-depth ratio, and mobile bed material, which allows the river to shift and branch around these accumulated deposits.2