Time (min)

Observed accumulated

infiltration (cm)^*

Calculated accumulated

infiltration (cm)^**

Percent of error (%)

Observed

Calculated

5

1.80

2.137

18.72

10

3.40

3.344

−1.65

15

4.75

4.365

−8.11

25

6.60

6.126

−7.18

40

8.45

8.39

−0.71

60

10.45

11.021

5.46

75

12.45

12.812

2.91

90

14.65

14.492

−1.08

110

17.00

16.599

−2.36

130

19.50

18.588

−4.68

Average error

0.134