prepare_SSURGO_hydro_data: Get and prepare basic soil hydraulic parameters from SSURGO...

In sharpshootR: A Soil Survey Toolkit

Get and prepare basic soil hydraulic parameters from SSURGO via SDA

Description

Get and prepare basic soil hydraulic parameters from SSURGO via SDA

Usage

prepare_SSURGO_hydro_data(cokeys, max.depth)

Arguments

cokeys	vector of component keys (cokey) in current SSURGO snapshot
max.depth	target depth of aggregation (cm), corrected later by real soil depth as reported by slab()

Details

Weighted mean soil hydraulic parameters are returned over the interval of 0-max.depth, calculated by aqp::slab().

Value

a list containing:

• SPC: SoilProfileCollection

• agg: aggregate representation of hydraulic parameters, by cokey

The following soil hydraulic properties are included:

variable	description
cokey	component key
hzname	horizon name
hz_top	horizon top depth (cm)
hz_bottom	horizon bottom depth (cm)
thick	horizon thickness (cm)
sat	VWC at saturation (cm/cm)
fc	VWC at field capacity defined by 1/3rd bar tension (cm/cm)
fc_tenthbar	VWC at field capacity defined by 1/3rd bar tension (cm/cm)
pwp	VWC at permanent wilting point or 15 bar tension (cm/cm)
awc	total sand content (<2mm fraction, mass %)
sand	total silt content (<2mm fraction, mass %)
silt	total clay content (<2mm fraction, mass %)
clay	total sand content (<2mm fraction, mass %)
dbthirdbar	bulk density at 1/3 bar tension (g/cm^3)
dbovendry	bulk density oven-dry basis (g/cm^3)
ksat	Ksat (um/second)
soil_fraction	volume fraction of soil (1 - coarse fragment volume fraction)

Author(s)

D.E. Beaudette

sharpshootR documentation built on Oct. 23, 2024, 1:06 a.m.