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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)