calc_BareSoilEvapCoefs: Calculate potential bare-soil evaporation coefficients

In Burke-Lauenroth-Lab/rSFSW2: Simulation Framework for SOILWAT2

Description

Soil texture influence based on re-analysis of data from Wythers et al. 1999. Default of depth_max_bs_evap = 15 cm from Torres et al. 2010.

Usage

calc_BareSoilEvapCoefs(layers_depth, sand, clay, depth_max_bs_evap_cm = 15)

Arguments

layers_depth	A numeric vector, matrix, or data.frame. Values describe the lower soil layer depths in units of centimeters.
sand	A numeric vector, matrix, or data.frame. Values are sand contents in units of mass-percentage / 100.
clay	A numeric vector, matrix, or data.frame. Values are clay contents in units of mass-percentage / 100.
depth_max_bs_evap_cm	A numeric value. The maximal soil depth in centimeters from which bare-soil evaporation is potentially drawing moisture.

Value

A numeric matrix with potential bare-soil evaporation coefficients where rows correspond to sites and columns to soil layers.

Notes

Rows of soil input arguments layers_depth, sand, and clay correspond to sites and columns to soil layers. If sand and/or clay are vectors, then they are converted to 1-row matrices. If layers_depth is a vector, then it is converted to a matrix with as many sites/rows as sand and clay have. That is the code assumes identical soil layer depths for each site. All soil input arguments must have a the same number of sites and of soil layers, i.e., identical matrix dimensions.

Warning

Influence of gravel is not accounted for.

References

Torres EA, Calera A (2010) Bare soil evaporation under high evaporation demand: a proposed modification to the FAO-56 model. Hydrological Sciences Journal- Journal des Sciences Hydrologiques, 55, 303-315.

Wythers K.R., Lauenroth W.K., Paruelo J.M. (1999) Bare-Soil Evaporation Under Semiarid Field Conditions. Soil Science Society of America Journal, 63, 1341-1349.

Burke-Lauenroth-Lab/rSFSW2 documentation built on Aug. 14, 2020, 5:20 p.m.