Figure: 30 TAC §298.330(e)(21)

United States Geological Survey Gage 08162600, Tres Palacios River near Midfield
Season Hydrologic
Condition		 Subsistence Base Small
Seasonal
Pulse
(2 per season)		 Large
Seasonal
Pulse
(1 per season)		 Annual
Pulse
Winter Severe 2 cfs 9 cfs Trigger:
650 cfs
Volume:
2,500 af
Duration:
6 days		 Trigger:
1,300 cfs
Volume:
4,900 af
Duration:
6 days		 Trigger:
2,000 cfs
Volume:
9,000 af
Duration:
8 days
Winter Dry N/A 9 cfs
Winter Average N/A 13 cfs
Winter Wet N/A 18 cfs
Spring Severe 2.5 cfs 9 cfs Trigger:
1,200 cfs
Volume:
4,400 af
Duration:
6 days		 Trigger:
1,900 cfs
Volume:
7,100 af
Duration:
6 days
Spring Dry N/A 9 cfs
Spring Average N/A 13 cfs
Spring Wet N/A 22 cfs
Summer Severe 1 cfs 7 cfs Trigger:
75 cfs
Volume:
360 af
Duration:
5 days		 Trigger:
280 cfs
Volume:
1,300 af
Duration:
6 days
Summer Dry N/A 7 cfs
Summer Average N/A 13 cfs
Summer Wet N/A 22 cfs
Fall Severe 1 cfs 7 cfs Trigger:
800 cfs
Volume:
3,200 af
Duration:
6 days		 Trigger:
1,900 cfs
Volume:
7,700 af
Duration:
7 days
Fall Dry N/A 7 cfs
Fall Average N/A 13 cfs
Fall Wet N/A 18 cfs

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