ptfkit.aimrun2009

ptfkit.aimrun2009 ¶

Aimrun & Amin (2009), Tanjung Karang Rice Irrigation Project, Malaysia.

Reference

Aimrun, W., & Amin, M. S. M. (2009). Pedo-transfer function for saturated hydraulic conductivity of lowland paddy soils. Paddy and Water Environment, 7, 217-225. DOI: 10.1007/s10333-009-0165-y

Territory: Tanjung Karang Rice Irrigation Project, located on a flat coastal plain in the Integrated Agricultural Development Area (IADA Barat Laut Selangor), Malaysia
Dataset: 408 lowland paddy soil samples from Sawah Sempadan rice cultivation area.

FUNCTION	DESCRIPTION
`calc_ptf_aimrun2009`	Estimate saturated hydraulic conductivity for lowland paddy soils.

calc_ptf_aimrun2009 ¶

calc_ptf_aimrun2009(*, clay: float, bulk_density: float, organic_matter: float, gmd: float) -> floating

calc_ptf_aimrun2009(*, clay: ArrayLike, bulk_density: ArrayLike, organic_matter: ArrayLike, gmd: ArrayLike, out: NDArray[floating] | None = None) -> NDArray[floating]

Estimate saturated hydraulic conductivity for lowland paddy soils.

PARAMETER	DESCRIPTION
`clay`	Clay content, <2 um. (%) TYPE: `float \| ArrayLike`
`bulk_density`	Dry bulk density. (g/cm^3) TYPE: `float \| ArrayLike`
`organic_matter`	Organic matter content. (%) TYPE: `float \| ArrayLike`
`gmd`	Geometric mean diameter of texture. (mm) TYPE: `float \| ArrayLike`
`out`	Optional output arrays for in-place calculation. TYPE: `NDArray[floating] \| None` DEFAULT: `None`

RETURNS	DESCRIPTION
`k_sat`	Saturated hydraulic conductivity. (m/s) TYPE: `floating \| NDArray[floating]`

Models

\(k(h)\): Saturated hydraulic conductivity

Notes

Prediction target: Saturated hydraulic conductivity from clay, dry bulk density, organic matter, and geometric mean diameter. Sand and silt are not inputs to the selected final model. Applicability: Clayey rice soils with compacted subsoil.

Warning

The formula uses natural logarithms of all inputs.

Source code in ptfkit/aimrun2009.py

def calc_ptf_aimrun2009(
    *,
    clay: float | ArrayLike,
    bulk_density: float | ArrayLike,
    organic_matter: float | ArrayLike,
    gmd: float | ArrayLike,
    out: NDArray[floating] | None = None,
) -> floating | NDArray[floating]:
    """Estimate saturated hydraulic conductivity for lowland paddy soils.

    Arguments:
        clay: Clay content, <2 um. (%)
        bulk_density: Dry bulk density. (g/cm^3)
        organic_matter: Organic matter content. (%)
        gmd: Geometric mean diameter of texture. (mm)
        out: Optional output arrays for in-place calculation.

    Returns:
        k_sat: Saturated hydraulic conductivity. (m/s)

    Models:
        $k(h)$: Saturated hydraulic conductivity

    Notes:
        Prediction target: Saturated hydraulic conductivity from clay, dry bulk density, organic
            matter, and geometric mean diameter.
        Sand and silt are not inputs to the selected final model.
        Applicability: Clayey rice soils with compacted subsoil.

    Warning:
        The formula uses natural logarithms of all inputs.

    """
    return _call(
        _calc_ptf_aimrun2009,
        clay,
        bulk_density,
        organic_matter,
        gmd,
        out=out,
    )