On larger streams, to accumulate the volume of water needed to cause flooding, either more rain must fall (this may be combined with snow melt), and/or the duration of the rain must be longer, and/or the area contributing runoff must be greater.
(the duration of the rain; must be; longer) (the volume of water; needed; to cause flooding) (the area; contributing; runoff) (the volume of water; to cause; flooding) (the area contributing runoff; must be; greater) (either more rain; must fall; ) (this; may be combined; with snow melt)
the duration of the rain the volume of water the area the volume of water the area contributing runoff either more rain this
must be needed contributing to cause must be must fall may be combined
longer
to cause flooding
runoff
flooding
greater
with snow melt