Important notice: This publication has moved to General Code's eCode360 platform and this site is no longer being updated. View the current version on eCode360.

14.10.110 Soil Infiltration Rates.

 

Infiltration Rate (IR)

Inches/Hour

 

 

 

Percent of Slope

Soil Texture, Type

0-4%

5-8%

8-12%

12-16%

Over 16%

Coarse Sand

1.25

1.00

.75

.50

.31

Medium Sand

1.06

.85

.64

.42

.27

Fine Sand

.94

.75

.56

.38

.24

Loamy Sand

.88

.70

.53

.35

.22

Sandy Loam

.75

.60

.45

.30

.19

Fine Sandy Loam

.63

.50

.38

.25

.16

V. Fine Sandy Loam

.59

.47

.35

.24

.15

Loam

.54

.43

.33

.22

.14

Silt Loam

.50

.40

.30

.20

.13

Silt

.44

.35

.26

.18

.11

Sandy Clay

.31

.25

.19

.12

.08

Clay Loam

.25

.20

.15

.10

.06

Silty Clay

.19

.15

.11

.08

.05

Clay

.13

.10

.08

.05

.03

 

     Note: Rates based on full cover. These figures decrease with time and percent of cover. Derived from USDA information.

(SCC 0812 ยง 1, 1990.)