Figure: 30 TAC §298.430(c)(6)

United States Geological Survey Gage 08195000, Frio River at Concan
  Winter Spring Summer Fall
Subsistence
Flow
11 cfs 10 cfs 10 cfs 10 cfs
Base Flow 61 cfs 61 cfs 47 cfs 55 cfs
Small
Seasonal
Pulse
(2 per season)
N/A Trigger: 120 cfs
Volume: 1,320 af
Duration: 8 days
N/A N/A
Large
Seasonal
Pulse
(1 per season)
Trigger: 89 cfs
Volume: 2,100 af
Duration:  12 days
Trigger: 300 cfs
Volume: 3,550 af
Duration: 12 days
Trigger: 240 cfs
Volume: 2,990 af
Duration: 13 days
Trigger: 79 cfs
Volume: 900 af
Duration:  5 days
Annual Pulse
(2 per year)
Trigger:  540 cfs
Volume:  9,430 af
Duration:  24 days

cfs = cubic feet per second
af = acre-feet
N/A = not applicable