`<ptfkit/li2007.h>`¶

#include <ptfkit/li2007.h>

Li et al. (2007), Fengqiu County, North China Plain, China.

Source¶

Li, Y., Chen, D., White, R. E., Zhu, A., & Zhang, J. (2007). Estimating soil hydraulic properties of Fengqiu County soils in the North China Plain using pedo-transfer functions. Geoderma, 138(3-4), 261-271.

DOI: 10.1016/j.geoderma.2006.11.018

Scope¶

Territory: Fengqiu County soils in the North China Plain, China

Dataset: 63 soil water retention curves and 36 saturated soil hydraulic conductivity samples from seven soil profiles.

PTF catalog page

`li2007_ptf_result`¶

typedef struct {
    double theta_s;
    double a_vg;
    double n_vg;
    double k_sat;
 } li2007_ptf_result;

Field	Description
`theta_s`	Saturated water content. (cm^3/cm^3)
`a_vg`	Van Genuchten alpha parameter, inversely related to air-entry suction. (cm^-1)
`n_vg`	Van Genuchten n parameter that characterizes pore-size distribution. (dimensionless)
`k_sat`	Saturated hydraulic conductivity. (m/s)

Functions¶

`calc_ptf_li2007`¶

Estimate van Genuchten parameters and saturated hydraulic conductivity for Fengqiu County soils.

static inline li2007_ptf_result calc_ptf_li2007(double sand, double silt, double clay, double bulk_density, double soil_organic_matter);

Parameters¶

Name	Direction	Description
`sand`	in	Sand content, 0.02-2 mm. (%)
`silt`	in	Silt content, 0.02-0.002 mm. (%)
`clay`	in	Clay content, <0.002 mm. (%)
`bulk_density`	in	Bulk density. (g/cm^3)
`soil_organic_matter`	in	Soil organic matter. (%)

Returns¶

A li2007_ptf_result value.

Warning

The formulas use natural logarithms of selected inputs.

<ptfkit/li2007.h>¶