Figure: 30 TAC §298.330(e)(9)

United States Geological Survey Gage 08151500, Llano River at Llano
Season Hydrologic
Condition		 Subsistence Base Small
Seasonal
Pulse
(2 per season)		 Large
Seasonal
Pulse
(1 per season)		 Annual
Pulse
Winter Severe 44 cfs 100 cfs Trigger:
390 cfs
Volume:
2,500 af
Duration:
13 days		 Trigger:
1,100 cfs
Volume:
6,800 af
Duration:
16 days		 Trigger:
9,100 cfs
Volume:
46,100 af
Duration:
18 days
Winter Dry N/A 100 cfs
Winter Average N/A 150 cfs
Winter Wet N/A 190 cfs
Spring Severe 35 cfs 100 cfs Trigger:
1,800 cfs
Volume:
8,500 af
Duration:
10 days		 Trigger:
4,800 cfs
Volume:
23,200 af
Duration:
13 days
Spring Dry N/A 100 cfs
Spring Average N/A 150 cfs
Spring Wet N/A 190 cfs
Summer Severe 3 cfs 67 cfs N/A Trigger:
560 cfs
Volume:
2,600 af
Duration:
9 days
Summer Dry N/A 67 cfs
Summer Average N/A 92 cfs
Summer Wet N/A 130 cfs
Fall Severe 20 cfs 87 cfs Trigger:
370 cfs
Volume:
1,600 af
Duration:
8 days		 Trigger:
1,400 cfs
Volume:
6,300 af
Duration:
11 days
Fall Dry N/A 87 cfs
Fall Average N/A 120 cfs
Fall Wet N/A 190 cfs

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