Soil
Parameter Estimates
Texture
class |
Percent by weight |
Suction head |
Conductivity |
Initial deficit |
Porosity |
Field capacity |
Wilting point |
|||
Sand |
Clay |
in |
mm |
in/h |
mm/h |
|||||
Sand |
88 |
5 |
1.9 |
49.5 |
4.26 |
108.1 |
0.34 |
0.46 |
0.10 |
0.05 |
Loamy
sand |
80 |
5 |
2.4 |
61.3 |
3.81 |
96.7 |
0.46 |
0.12 |
0.05 |
|
Sandy
loam |
65 |
10 |
4.3 |
110.1 |
1.98 |
50.3 |
0.33 |
0.45 |
0.18 |
0.08 |
Loam |
40 |
20 |
3.5 |
88.9 |
0.61 |
15.5 |
0.31 |
0.46 |
0.28 |
0.14 |
Silt
loam |
20 |
15 |
6.6 |
166.8 |
0.63 |
16.1 |
0.32 |
0.48 |
0.31 |
0.11 |
Silt |
10 |
5 |
0.87 |
22 |
0.48 |
0.30 |
0.06 |
|||
Sandy
clay loam |
60 |
25 |
8.6 |
218.5 |
0.44 |
11.3 |
0.26 |
0.43 |
0.27 |
0.17 |
Clay
loam |
30 |
35 |
8.2 |
208.8 |
0.17 |
4.3 |
0.24 |
0.48 |
0.36 |
0.22 |
Silty clay loam |
10 |
35 |
10.7 |
273.0 |
0.22 |
5.7 |
0.51 |
0.38 |
0.22 |
|
Silty clay |
10 |
45 |
11.5 |
292.2 |
0.15 |
3.7 |
0.52 |
0.41 |
0.27 |
|
Sandy
clay |
50 |
40 |
9.4 |
239.0 |
0.06 |
1.4 |
0.44 |
0.36 |
0.25 |
|
Clay |
25 |
50 |
12.5 |
316.3 |
0.04 |
1.1 |
0.21 |
0.50 |
0.42 |
0.30 |
Sources:
1.
Composition, conductivity, porosity, field
capacity, wilting point: Saxton and Rawls, Soil Water Characteristic Estimates
by Texture and Organic Matter for Hydrologic Solutions, Soil Sci. Soc. Am. J.
70:1569–1578 (2006). https://www.atmos.illinois.edu/~sshu3/model/saxton2006.pdf
2.
Suction head: Rawls, Brakensiek,
and Miller, Green‐Ampt Infiltration Parameters from
Soils Data, Journal of Hydraulic Engineering, 109:1 (1983). http://dx.doi.org/10.1061/(ASCE)0733-9429(1983)109:1(62)
3.
Initial deficit: SWMM 4 manual, p. 112.