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Pennsylvania Geological Survey

Pennsylvania Water Science Center

Estimates of Mean-Monthly & Annual Ground-Water Recharge

Brandywine Creek at Chadds Ford: 01481000

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Data Tables

Mean-Monthly Recharge From RORA Method, as Percent of Annual Recharge for Period of Record -- Brandywine Creek at Chadds Ford
OctNovDecJanFebMarAprMayJunJulAugSep
5.3
7.8
9.0
10.3
11.9
14.2
12.0
8.7
5.6
5.2
4.7
5.2


Annual Recharge, in inches -- Brandywine Creek at Chadds Ford
YearRecharge From RORABase Flow from PART
1912
16.5
13.9
1913
16.0
16.1
1914
12.3
10.8
1915
21.5
14.2
1916
10.6
12.1
1917
12.1
10.6
1918
8.5
7.6
1919
14.4
13.4
1920
14.1
13.2
1921
9.8
9.6
1922
10.4
9.2
1923
12.0
9.3
1924
20.3
18.0
1925
10.6
9.8
1926
11.8
9.5
1927
15.5
14.7
1928
20.6
18.5
1929
14.2
12.2
1930
9.4
8.8
1931
7.3
7.0
1932
10.2
8.7
1933
18.1
16.5
1934
15.0
12.4
1935
14.9
14.3
1936
18.2
15.9
1937
13.7
12.7
1938
16.1
14.1
1939
17.6
15.4
1940
15.4
12.5
1941
8.9
8.9
1942
12.6
9.7
1943
13.0
12.8
1944
11.0
9.3
1945
16.7
12.5
1946
12.9
13.4
1947
11.8
10.8
1948
19.6
16.3
1949
14.8
15.1
1950
14.0
12.2
1951
16.4
13.6
1952
22.9
20.6
1963
8.6
7.1
1964
12.4
11.3
1965
9.4
8.4
1966
9.8
7.9
1967
14.3
12.6
1968
13.6
12.9
1969
9.7
7.9
1970
15.2
14.0
1971
22.8
18.9
1972
23.3
19.8
1973
21.3
18.5
1974
16.9
14.0
1975
24.6
21.6
1976
15.7
13.5
1977
14.9
11.9
1978
20.6
19.7
1979
27.2
24.1
1980
12.5
13.3
1981
7.6
7.0
1982
14.2
11.6
1983
23.7
18.6
1984
24.0
22.2
1985
9.3
8.7
1986
14.5
11.2
1987
13.7
12.4
1988
12.4
11.8
1989
20.6
18.1
1990
14.6
13.3
1991
12.5
11.2
1992
10.9
9.5
1993
18.5
16.1
1994
17.1
15.7
1995
9.9
9.1
1996
33.2
26.5
1997
12.6
13.7
1998
13.1
11.9
1999
12.7
10.6
2000
15.5
14.6
2001
11.3
10.9

 

 

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