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Pennsylvania Geological Survey

Pennsylvania Water Science Center

Estimates of Mean-Monthly & Annual Ground-Water Recharge

Jordan Creek at Allentown: 01452000

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Data Tables

Mean-Monthly Recharge From RORA Method, as Percent of Annual Recharge for Period of Record -- Jordan Creek at Allentown
OctNovDecJanFebMarAprMayJunJulAugSep
5.1
9.8
10.4
10.5
11.1
17.7
10.7
9.2
3.9
3.6
3.5
4.5


Annual Recharge, in inches -- Jordan Creek at Allentown
YearRecharge From RORABase Flow from PART
1945
21.7
17.5
1946
15.8
12.8
1947
17.5
15.1
1948
19.4
13.7
1949
12.4
11.3
1950
17.1
13.6
1951
21.3
16.2
1952
25.5
20.1
1953
24.3
19.3
1954
13.1
8.8
1955
14.6
12.3
1956
18.1
14.1
1957
10.8
8.8
1958
17.6
15.1
1959
12.2
10.0
1960
17.8
15.1
1961
14.8
13.3
1962
14.3
11.6
1963
9.1
7.3
1964
12.0
9.7
1965
6.9
5.5
1966
8.7
6.7
1967
14.5
12.3
1968
13.9
12.0
1969
10.3
9.3
1970
20.0
15.6
1971
21.0
16.4
1972
22.5
16.6
1973
21.5
16.5
1974
17.3
15.2
1975
23.7
18.0
1976
15.0
12.3
1977
22.2
16.3
1978
17.2
13.6
1979
23.0
17.9
1980
9.4
8.6
1981
8.7
7.3
1982
16.0
11.3
1983
23.2
17.4
1984
18.5
15.5
1985
11.0
9.4
1986
16.5
11.8
1987
13.4
11.5
1988
14.8
11.9
1989
16.6
14.5
1990
20.2
15.2
1991
12.2
10.1
1992
16.3
11.4
1993
23.3
17.3
1994
25.5
20.0
1995
13.4
10.6
1996
27.5
19.0
1997
12.3
10.0
1998
16.9
14.0
1999
16.1
11.8
2000
15.8
12.4
2001
12.2
10.4

 

 

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