2018 Recharge-Report

Table 1. Estimated Annual Groundwater Recharge to the San Antonio Segment of the Balcones Fault Zone Edwards Aquifer by Drainage Basin, 1934–2018 (in thousands of acre-feet).

Area between Medina River and Cibolo Creek/Dry Comal Creek Basins

Area between Sabinal River and Medina River Basins

Cibolo Creek/ Dry Comal Creek Basin

Nueces River/ West Nueces River Basin

Frio River/ Dry Frio River Basin

Sabinal River Basin

Blanco River Basin

Medina River Basin

Year 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973

Total a 179.6

8.6

27.9

7.5

19.9

46.5 71.1 91.6 80.5 65.5 42.4 38.8 54.1 51.7 41.5 50.5 54.8 51.4 44.0 14.8 33.0 23.6 21.1 25.4 36.2 25.3 16.5 55.6 95.5 94.7 88.3 57.3 41.9 43.3 54.6 50.5 44.7 59.9 55.4 68.0 68.7 87.9 97.6 6.3

21.0

28.4

19.8

411.3 176.5

192.3 157.4

56.6 43.5 21.5 20.9 17.0 23.8 50.6 34.0 11.1 24.8 30.8 16.5 16.7 26.0 31.5 13.3

166.2 142.9

138.2 108.9

182.7 146.1

39.8 1,258.2

42.7 21.2 36.4 11.1 18.8 57.8 28.6 20.1 46.2 35.7 40.7 31.6 13.2 23.5 17.4 10.6 20.7 24.9 10.7 33.6 62.4 49.4 18.9 16.2 22.2 66.7 34.6 19.0 49.3 46.6 39.5 22.2 33.4 9.5 8.2

909.6 400.7 432.7 399.0 308.8 850.7 557.8 273.1 560.9 527.8 556.1 422.6 178.3 508.1 200.2 139.9 275.5 167.6 162.1 192.0 690.4 824.8 717.1 239.4 170.7 413.2 623.5 615.2 466.5 884.7 610.5 661.6 925.3 756.4 43.7

28.8 63.5

75.7 69.3 49.5 60.3 95.1 42.3 76.0 71.1 54.2 77.7 25.6 86.1 35.5 28.4 15.7 15.1 31.6 22.1

61.3 54.1 33.1 56.6 84.4 33.8 74.3 78.6 52.0 45.2 20.2 70.3 27.0 26.4 30.2

47.8 46.2

63.9 76.8

227.0

9.3

9.6

50.4 89.9

29.3

30.8

151.8

139.0

116.3 66.9 29.5 72.5 79.6 55.5 17.5 41.8 17.3 15.3 50.1 20.1 105.1

191.2

103.5 36.5 64.1 47.3 80.9 72.4 41.1 41.5 18.3 27.9 21.4 61.3 166.0 128.0 108.6 266.7 109.6 15.6

93.6 58.3

152.5 129.9 155.3

79.5 19.9 55.9 24.6 12.5

7.3 3.2 3.2 7.1 0.6 1.6

102.3

4.4

42.3 10.0

11.9

4.2 4.3 2.0

7.7 3.6

3.3 2.2

4.2

133.6 300.0 158.9 128.1 151.3

65.4

129.5 294.9

175.6 190.9

397.9 268.7

76.4 1,142.6 70.7 1,711.2

223.8

61.6 64.9 57.4

96.7

57.4 89.7 69.3 16.7 35.8 78.8 44.5 30.2 83.1 60.2 68.8 81.4 74.3 9.3

77.9

88.7 85.2 47.4 39.7

127.0 105.4

104.0

160.0 110.8

46.6 27.0 57.1 83.0

4.3 5.0

23.5 10.3 61.3

24.7 21.3 51.1

126.1

16.3 23.2 37.7 30.4 66.4 30.7 35.4 39.2 49.0

97.9

104.0

115.3

169.2

134.0 137.9 176.0 113.8 141.9 212.4 144.6 256.9

78.2 64.8

66.5 57.3

82.2

130.8 119.7 112.6 263.4 108.4 190.6

198.7

120.5

84.2 81.6

99.9

113.8

155.6 154.6 286.4

82.4

104.2 211.7

123.9

237.2

82.2 1,486.5

4 | 2018 RECHARGE REPORT