Saturated hydraulic conductivity PTFs for the Loess Plateau of China.¶
Source¶
Zhao, C., Shao, M., Jia, X., Nasir, M., & Zhang, C. (2016). Using pedotransfer functions to estimate soil hydraulic conductivity in the Loess Plateau of China. CATENA, 143, 1-6. https://doi.org/10.1016/j.catena.2016.03.037
DOI: 10.1016/j.catena.2016.03.037
Scope¶
Territory: Typical Loess Plateau of China, covering approximately 430,000 square kilometers.
Dataset: 729 samples from 243 sites, sampled in 2012 at depths of 0-10, 10-20, and 20-40 cm. Each of 400 random calibration-validation splits used 583 development records and 146 validation records (Section 2.3.1).
Functions¶
calc_ptf_zhao2016_m2_1¶
Estimate saturated hydraulic conductivity using reconstructed M2-1.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Highest-ranked fitted PTF, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.
calc_ptf_zhao2016_m2_2¶
Estimate saturated hydraulic conductivity using reconstructed M2-2.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Mean coefficients of the top 25 percent, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.
calc_ptf_zhao2016_m2_3¶
Estimate saturated hydraulic conductivity using reconstructed M2-3.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Mean coefficients of the top 50 percent, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.
calc_ptf_zhao2016_m2_4¶
Estimate saturated hydraulic conductivity using reconstructed M2-4.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Mean coefficients of the top 75 percent, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.
calc_ptf_zhao2016_m2_5¶
Estimate saturated hydraulic conductivity using reconstructed M2-5.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Mean coefficients of all 400 PTFs, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.
calc_ptf_zhao2016_m2_6¶
Estimate saturated hydraulic conductivity using reconstructed M2-6.
Status: implemented
Prediction target: Saturated hydraulic conductivity
Inputs¶
| Name | Type | Unit | Domain | Description |
|---|---|---|---|---|
bulk_density | number | g/cm^3 | Observed range in Table 1: 0.97 to 1.79 g/cm^3. | Soil bulk density measured on undisturbed cores. |
silt | number | % | Observed range in Table 1: 2.04 to 76.01 percent. | Silt content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
clay | number | % | Observed range in Table 1: 0.010 to 32.67 percent. | Clay content measured by laser diffraction using USDA taxonomy (Section 2.2.2). |
Outputs¶
| Name | Unit | Domain | Description |
|---|---|---|---|
ks | mm/min | Observed range in Table 1: 0.01 to 0.99 mm/min; not an output clamp. | Saturated hydraulic conductivity, measured by the constant-head method. |
Note
Lowest-ranked fitted PTF, ranked by descending R-squared (Section 3.3).
Note
Uses Table 1 means and standard deviations for Jia et al. (2012) Equation 3 on both predictors and response, as a reviewed reconstruction.
Warning
The publication does not explicitly confirm Table 1 statistics as the fitted scaling constants or the application of response scaling. This reconstruction has not been verified against author software.
Warning
Observed ranges describe the sampled soils; predictions are not clamped.