DRAINAGE

THE DRAINAGE MEANS THE WATER SYSTEM OF AN AREA.
AREA DRAINED BY SINGLE RIVER IS CALLED DRAINAGE BASIN.
ANY ELEVATED AREA SUCH AS MOUNTAIN SEPERATES THE TWO DRAINAGE BASIN AND ARE CALLED WATER DIVIDE.
THE WORLD LARGEST DRAINAGE BASIN IS OF AMAZON RIVER.
IN INDIA,THE LARGEST RIVER SYSTEM IS OF GANGES RIVER.
INDIAN RIVER ARE DIVIDED INTO TWO MAJOR RIVER SYSTEM:
1)HIMALAYAN RIVERS
2)PENNINSULAR RIVERS.