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United States Department of Agriculture

Agricultural Research Service

ROSETTA Class Average Hydraulic Parameters
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The table below gives class-average values of the seven hydraulic parameters for the twelve USDA textural classes. Effectively, this table represents the first model of the hierarchical sequence. For the qr, q s, a, n and Ks parameters, the values have been generated by computing the average values for each textural class. For Ko and L the values were generated by inserting the class average values of qr, qs, a, n into Model C2 (see Rosetta's help file). This means that Ko and L are based on predicted parameters and may not be very reliable. The values in parentheses give the one standard deviation uncertainties of the class average values

 
Texture
Class

N


 
-- qr --
cm3/cm3

-- qs --
cm3/cm3

-- log(a) --
log(1/cm)

-- log(n) --
log10

-- Ks --
log(cm/day)

-- Ko --
log(cm/day)

-- L --
 

Clay

84

0.098

(0.107)

0.459

(0.079)

-1.825

(0.68)

0.098

(0.07)

1.169

(0.92)

0.472

(0.26)

-1.561

(1.39)

C loam

140

0.079

(0.076)

0.442

(0.079)

-1.801

(0.69)

0.151

(0.12)

0.913

(1.09)

0.699

(0.23)

-0.763

(0.90)

Loam

242

0.061

(0.073)

0.399

(0.098)

-1.954

(0.73)

0.168

(0.13)

1.081

(0.92)

0.568

(0.21)

-0.371

(0.84)

L Sand

201

0.049

(0.042)

0.390

(0.070)

-1.459

(0.47)

0.242

(0.16)

2.022

(0.64)

1.386

(0.24)

-0.874

(0.59)

Sand

308

0.053

(0.029)

0.375

(0.055)

-1.453

(0.25)

0.502

(0.18)

2.808

(0.59)

1.389

(0.24)

-0.930

(0.49)

S Clay

11

0.117

(0.114)

0.385

(0.046)

-1.476

(0.57)

0.082

(0.06)

1.055

(0.89)

0.637

(0.34)

-3.665

(1.80)

S C L

87

0.063

(0.078)

0.384

(0.061)

-1.676

(0.71)

0.124

(0.12)

1.120

(0.85)

0.841

(0.24)

-1.280

(0.99)

S loam

476

0.039

(0.054)

0.387

(0.085)

-1.574

(0.56)

0.161

(0.11)

1.583

(0.66)

1.190

(0.21)

-0.861

(0.73)

Silt

6

0.050

(0.041)

0.489

(0.078)

-2.182

(0.30)

0.225

(0.13)

1.641

(0.27)

0.524

(0.32)

0.624

(1.57)

Si Clay

28

0.111

(0.119)

0.481

(0.080)

-1.790

(0.64)

0.121

(0.10)

0.983

(0.57)

0.501

(0.27)

-1.287

(1.23)

Si C L

172

0.090

(0.082)

0.482

(0.086)

-2.076

(0.59)

0.182

(0.13)

1.046

(0.76)

0.349

(0.26)

-0.156

(1.23)

Si Loam

330

0.065

(0.073)

0.439

(0.093)

-2.296

(0.57)

0.221

(0.14)

1.261

(0.74)

0.243

(0.26)

0.365

(1.42)


Last Modified: 10/17/2005
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