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Pennsylvania Geological Survey

Pennsylvania Water Science Center

Estimates of Mean-Monthly & Annual Ground-Water Recharge

Darby Creek at Waterloo Mills near Devon: 01475300

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Data Tables

Mean-Monthly Recharge From RORA Method, as Percent of Annual Recharge for Period of Record -- Darby Creek at Waterloo Mills near Devon
OctNovDecJanFebMarAprMayJunJulAugSep
5.8
8.2
9.4
11.7
10.9
15.0
11.6
8.7
5.1
4.4
3.6
5.6


Annual Recharge, in inches -- Darby Creek at Waterloo Mills near Devon
YearRecharge From RORABase Flow from PART
1973
22.3
21.1
1974
17.0
16.9
1975
25.6
22.7
1976
15.7
15.5
1977
18.7
15.3
1978
20.7
20.3
1979
28.4
26.4
1980
11.9
12.4
1981
11.7
10.3
1982
14.7
13.7
1983
18.2
16.4
1984
16.5
16.2
1985
9.1
8.1
1986
14.0
11.7
1987
14.4
14.3
1988
12.5
11.5
1989
16.9
15.9
1990
16.8
14.5
1991
14.3
14.2
1992
15.3
13.4
1993
16.8
15.7

 

 

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