Characteristics on flow timing

Average flow events

ta1	Constancy by Colwell (1974) applied to flows.
ta2	Predictability by Colwell (1974) applied to flows.

Low flow events

tl1	Timing of annual minimum flow.
tl2	Variability in timing of annual minimum flow.

High flow events

th1	Timing of annual maximum flow.
th2	Variability in timing of annual maximum flow.