drainage basin
area of land drained by a river, defined by the watershed
drainage network
the pattern of linked streams and river within a drainage basin
river discharge
the quantity of water flowing in a river channel art a particular location and time
cumecs
a measure of discharge in cubic metres of water per second moving past a particular point of the river’s course
river regime
the seasonal variations in the discharge of a river
hydrograph
a graph showing the discharge of a river over a given period of time
permeable
a material that allows liquids to pass through it
impermeable
a material that does not allow liquids to pass through it