Table 1. Estimated annual recharge to the Edwards aquifer by basin, 1934-97
[thousands of acre-feet; footnotes denoted by *, #, +]
----------------------------------------------------------------------------------------------------------------------------------------
Calendar Nueces- Frio-Dry Sabinal Area between Sabinal Medina Area between Medina River Cibolo Creek Blanco Total+
year West Nueces Frio River River and Medina River River Basin and Cibolo-Dry and Dry Comal River
River Basin Basin* Basin* Basins* Basin# Comal Creek Basins* Creek Basins Basin*
----------------------------------------------------------------------------------------------------------------------------------------
1934 8.6 27.9 7.5 19.9 46.5 21.0 28.4 19.8 179.6
1935 411.3 192.3 56.6 166.2 71.1 138.2 182.7 39.8 1,258.2
1936 176.5 157.4 43.5 142.9 91.6 108.9 146.1 42.7 909.6
1937 28.8 75.7 21.5 61.3 80.5 47.8 63.9 21.2 400.7
1938 63.5 69.3 20.9 54.1 65.5 46.2 76.8 36.4 432.7
1939 227.0 49.5 17.0 33.1 42.4 9.3 9.6 11.1 399.0
1940 50.4 60.3 23.8 56.6 38.8 29.3 30.8 18.8 308.8
1941 89.9 151.8 50.6 139.0 54.1 116.3 191.2 57.8 850.7
1942 103.5 95.1 34.0 84.4 51.7 66.9 93.6 28.6 557.8
1943 36.5 42.3 11.1 33.8 41.5 29.5 58.3 20.1 273.1
1944 64.1 76.0 24.8 74.3 50.5 72.5 152.5 46.2 560.9
1945 47.3 71.1 30.8 78.6 54.8 79.6 129.9 35.7 527.8
1946 80.9 54.2 16.5 52.0 51.4 105.1 155.3 40.7 556.1
1947 72.4 77.7 16.7 45.2 44.0 55.5 79.5 31.6 422.6
1948 41.1 25.6 26.0 20.2 14.8 17.5 19.9 13.2 178.3
1949 166.0 86.1 31.5 70.3 33.0 41.8 55.9 23.5 508.1
1950 41.5 35.5 13.3 27.0 23.6 17.3 24.6 17.4 200.2
1951 18.3 28.4 7.3 26.4 21.1 15.3 12.5 10.6 139.9
1952 27.9 15.7 3.2 30.2 25.4 50.1 102.3 20.7 275.5
1953 21.4 15.1 3.2 4.4 36.2 20.1 42.3 24.9 167.6
1954 61.3 31.6 7.1 11.9 25.3 4.2 10.0 10.7 162.1
1955 128.0 22.1 .6 7.7 16.5 4.3 3.3 9.5 192.0
1956 15.6 4.2 1.6 3.6 6.3 2.0 2.2 8.2 43.7
1957 108.6 133.6 65.4 129.5 55.6 175.6 397.9 76.4 1,142.6
1958 266.7 300.0 223.8 294.9 95.5 190.9 268.7 70.7 1,711.2
1959 109.6 158.9 61.6 96.7 94.7 57.4 77.9 33.6 690.4
1960 88.7 128.1 64.9 127.0 104.0 89.7 160.0 62.4 824.8
1961 85.2 151.3 57.4 105.4 88.3 69.3 110.8 49.4 717.1
1962 47.4 46.6 4.3 23.5 57.3 16.7 24.7 18.9 239.4
1963 39.7 27.0 5.0 10.3 41.9 9.3 21.3 16.2 170.7
1964 126.1 57.1 16.3 61.3 43.3 35.8 51.1 22.2 413.2
1965 97.9 83.0 23.2 104.0 54.6 78.8 115.3 66.7 623.5
1966 169.2 134.0 37.7 78.2 50.5 44.5 66.5 34.6 615.2
1967 82.2 137.9 30.4 64.8 44.7 30.2 57.3 19.0 466.5
1968 130.8 176.0 66.4 198.7 59.9 83.1 120.5 49.3 884.7
1969 119.7 113.8 30.7 84.2 55.4 60.2 99.9 46.6 610.5
1970 112.6 141.9 35.4 81.6 68.0 68.8 113.8 39.5 661.6
1971 263.4 212.4 39.2 155.6 68.7 81.4 82.4 22.2 925.3
1972 108.4 144.6 49.0 154.6 87.9 74.3 104.2 33.4 756.4
1973 190.6 256.9 123.9 286.4 97.6 237.2 211.7 82.2 1,486.5
1974 91.1 135.7 36.1 115.3 96.2 68.1 76.9 39.1 658.5
1975 71.8 143.6 47.9 195.9 93.4 138.8 195.7 85.9 973.0
1976 150.7 238.6 68.2 182.0 94.5 47.9 54.3 57.9 894.1
1977 102.9 193.0 62.7 159.5 77.7 97.9 191.6 66.7 952.0
1978 69.8 73.1 30.9 103.7 76.7 49.6 72.4 26.3 502.5
1979 128.4 201.4 68.6 203.1 89.4 85.4 266.3 75.2 1,117.8
1980 58.6 85.6 42.6 25.3 88.3 18.8 55.4 31.8 406.4
1981 205.0 365.2 105.6 252.1 91.3 165.0 196.8 67.3 1,448.4
1982 19.4 123.4 21.0 90.9 76.8 22.6 44.8 23.5 422.4
1983 79.2 85.9 20.1 42.9 74.4 31.9 62.5 23.2 420.1
1984 32.4 40.4 8.8 18.1 43.9 11.3 16.9 25.9 197.9
1985 105.9 186.9 50.7 148.5 64.7 136.7 259.2 50.7 1,003.3
1986 188.4 192.8 42.2 173.6 74.7 170.2 267.4 44.5 1,153.7
1987 308.5 473.3 110.7 405.5 90.4 229.3 270.9 114.9 2,003.6
1988 59.2 117.9 17.0 24.9 69.9 12.6 28.5 25.5 355.5
1989 52.6 52.6 8.4 13.5 46.9 4.6 12.3 23.6 214.4
1990 479.3 255.0 54.6 131.2 54.0 35.9 71.8 41.3 1,123.2
1991 325.2 421.0 103.1 315.2 52.8 84.5 109.7 96.9 1,508.4
1992 234.1 586.9 201.1 566.1 91.4 290.6 286.6 228.9 2,485.7
1993 32.6 78.5 29.6 60.8 78.5 38.9 90.9 37.8 447.6
1994 124.6 151.5 29.5 45.1 61.1 34.1 55.6 36.6 538.1
1995 107.1 147.6 34.7 62.4 61.7 36.2 51.1 30.6 531.3
1996 130.0 92.0 11.4 9.4 42.3 10.6 14.7 13.9 324.3
1997 176.9 209.1 57.0 208.4 63.3 193.4 144.2 82.3 1,134.6
AVERAGE 116.6 133.1 41.7 107.1 61.1 70.6 103.9 41.9 676.0
----------------------------------------------------------------------------------------------------------------------------------------
* Includes recharge from ungaged areas (fig. 1).
# Recharge to Edwards aquifer from the Medina River Basin consists entirely of losses from Medina Lake (Puente, 1978, p. 23).
+ Total might not equal sum of basin values due to rounding.