2016 Recharge Report

Table 2. Estimated Annual Enhanced Recharge from Edwards Aquifer Authority-Operated Recharge Structures (measured in acre-feet).

San Geronimo (November 1979)

Parker (April 1974)

Verde (April 1978)

Seco (October 1982)

Year 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 Total

Annual Total

160 620

--- --- --- ---

--- --- --- --- ---

--- --- --- --- --- --- --- ---

160 620

2,018

2,018

6

6

98

150

248

2,315

1,725

0

4,040 1,274 4,102

0

371

903

772

1,923

1,407

3 0

112 254 246 440 889

91

0 0

206 254 640

0 0

251 232 217

143 643

1,097

2,412 3,649 20,336

963

1,580 12,915

2,104

4,141

1,176

0 0

0 0

0 0

0 0

0 0

49

176 966

41

479

745

647 723

1,647 2,874

2,160 14,631

5,420 21,003

2,775

0

0 0

334

508

842 164

159

0

5

18

79

51

880

1,028

0

0

0

0

0

2,941 a 1,469 a/b

2,154 b 1,160 b 1,371 b 657 b/d 1,511 0 b

1,579 b

7,515 b 3,796b

14,189 b 7,297 b 7,901 b 4,422 b/d 26,544 1,314 21,993 50 b/c

872 b

0 b

0 b

50 c

901 b 526 b 1,811

1,023 b 1,085 b/d

4,606 b 2,154 b/d 18,872

4,350

665

184 170

0

465

2,363

4,778

14,682

795

0 0

0 0

58

853

0

0

0

5,998

2,091

7,268

10,645

26,002

2.6

2.5

0

0

5

630.3

30.5

0.1

27.5

688.4

1,356.4

1,324

4,375.1

6,170.7

13,226.2

10.1 1.0 0.6 759

4.5

1.0

0

15.6

51.2

0 0 0

97.5

149.7

0

0.4

1.0

38.0

319.4

1,116.4 7,079.2 8,798.8 210,812

418.5 2,257.2 33,297

815.8 747.4 26,559

1,162.8 1,776.2 38,854

4,682.1 4,018.0 108,307

251 774

184 681

71

472

1,028 4,903

Median

1,022

3,185

Mean

Data source: Unpublished Edwards Aquifer Authority files (2014). a = Written communication from USGS, San Antonio Subdistrict Office. b = Determined by linear-regression analysis using rainfall data and historical recharge data. c = Linear-regression analysis indicates zero recharge; however, one recharge event was observed that was estimated to have recharged 50 acre-feet. d = Part of 2001 recharge estimate provided by HDR Engineering, Inc. (unpublished report). --- = Years prior to construction of recharge structure.