Along the whole of the Samara bend the Volga is accompanied on its right bank by high cliffs, which it is constantly undermining, while broad lowland areas stretch along the left or eastern bank, and are intersected by several old beds of the Volga.
At Tsaritsyn the great river reaches its extreme south-western limit, and is there separated from the Don by an isthmus only 45 m.
The figures given show how immensely the river varies in volume, and the greatness of the changes which are constantly going on in the channel and on its banks.