They are found in the Mississippi drainage basin and in certain southeastern streams.
The drainage basin measured from the water-partings of the enclosing mountains is some three times as great.
Arkansas lies in the drainage basin of the lower Mississippi, and has a remarkable river system.
In length it is equal to the Yenisei and Blue River, but its drainage basin is larger than that of either of the others.
The third drainage basin is that of the great central plateau, or alta-planicie.
The evidences of many such village sites may be seen throughout all the region of the Missouri River drainage basin.
The area of the drainage basin is estimated at 56,000 sq. m.
The drainage basin of Tower Creek coincides with the limits of the extinct crater of an ancient volcano.
The Major described the drainage basin of the San Rafael as wofully barren and desolate, like the rest of our surroundings.
This all represents earth material eroded from the drainage basin of the river.