There is evidence also that glacial moraine formations from time to time may have largely affected the catchment area of these tributary streams. It would be as rash to assert that from Lake Victoria no waters could ever have issued with an eastward flow as it would be to state that 'from Chakmaktin none ever flow westwards.
Suffice, for there is no sufficient catchment area north of the snows to support it.
The "basin" of the Volga is not limited to its actual catchment area.
The Ganges is essentially a river of great cities: Calcutta, Monghyr, Patna, Benares and Allahabad all lie on its course below its junction with the Jumna; and the ancient capitals, Agra and Delhi, are on the Jumna, higher up. The catchment basin of the Ganges is bounded on the N.
In English it has been called indifferently the " catchment basin," the " gathering ground," the " drainage area " and the " watershed."
The plateau or highland region which forms the waterparting between the Tarim basin on the east and the Syr-darya catchment area on the west.
Towards the end of the period, however, during the deposition of the Portlandian beds, the sea again retreated, and in the early part of the Cretaceous period was limited (in France) to the catchment basins of the Sane and Rhnein the Paris basin the contemporaneous deposits were chiefly estuarine and were confined to the northern and eastern rim.
The whole of the land which directs drainage towards one river is known as its basin, catchment area or drainage area - sometimes, by an incorrect expression, as its valley or even its watershed.
The catchment area from which the Caspian is fed extends to a very much greater distance on the west and north than it does on the south and east.