Figure: 30 TAC §298.380(c)(11)

United States Geological Survey Gage 08181500, Medina River at San Antonio
Season Hydrologic
Condition		 Subsistence Base Small
Seasonal
Pulse
(2 per season)		 Large
Seasonal
Pulse
(1 per season)
Winter Dry 14 cfs 20 cfs Trigger:
120 cfs
Volume:
970 af
Duration:
15 days		 Trigger:
350 cfs
Volume:
3,570 af
Duration:
27 days
Winter Average N/A 53 cfs
Winter Wet N/A 71 cfs
Spring Dry 12 cfs 37 cfs Trigger:
380 cfs
Volume:
2,680 af
Duration:
17 days		 Trigger:
1,000 cfs
Volume:
7,950 af
Duration:
27 days
Spring Average N/A 62 cfs
Spring Wet N/A 77 cfs
Summer Dry 8 cfs 33 cfs Trigger:
140 cfs
Volume:
860 af
Duration:
12 days		 Trigger:
440 cfs
Volume:
3,050 af
Duration:
21 days
Summer Average N/A 57 cfs
Summer Wet N/A 72 cfs
Fall Dry 13 cfs 27 cfs Trigger:
130 cfs
Volume:
930 af
Duration:
14 days		 Trigger:
450 cfs
Volume:
3,890 af
Duration:
28 days
Fall Average N/A 60 cfs
Fall Wet N/A 74 cfs

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