cal_DeepPercolation

Supports the calculation of meteorological characteristics in
evapotranspiration research and reference crop evapotranspiration, and offers
three models to simulate crop evapotranspiration and soil water balance in
the field, including single crop coefficient and dual crop coefficient,
as well as the Shuttleworth-Wallace model. These calculations main refer to
Allen et al.(1998, ISBN:92-5-104219-5), Teh (2006, ISBN:1-58-112-998-X), and
Liu et al.(2006) <doi:10.1016/j.agwat.2006.01.018>.

Minguo Liu

simET

Tools for Simulation of Evapotranspiration of Field Crops and
Soil Water Balance

Huimin Yang

cal_DeepPercolation function

<dl><dt>Wa</dt>
<dd>actual soil water storage in the root zone (mm)</dd>
<dt>Wfc</dt>
<dd>soil water storage to maximum root depth (Zr ) at field capacity (mm)</dd>
<dt>a</dt>
<dd>A water storage value comprised between WFc and Wa at saturation.</dd>
<dt>b</dt>
<dd>b&lt;-0.0173 for soils draining quickly.Otherwise b&gt;-0.0173.</dd>
<dt>t</dt>
<dd>time after an irrigation or rain that produced a storage above field capacity (days)</dd></dl>

Arguments

Calculating Deep percolation — cal_DeepPercolation

<dl>

<dt>Wa</dt>
<dd>actual soil water storage in the root zone (mm)</dd>


<dt>Wfc</dt>
<dd>soil water storage to maximum root depth (Zr ) at field capacity (mm)</dd>


<dt>a</dt>
<dd>A water storage value comprised between WFc and Wa at saturation.</dd>


<dt>b</dt>
<dd>b&lt;-0.0173 for soils draining quickly.Otherwise b&gt;-0.0173.</dd>


<dt>t</dt>
<dd>time after an irrigation or rain that produced a storage above field capacity (days)</dd>

</dl>

cal_DeepPercolation: Calculating Deep percolation

Description

Usage

Value

Arguments

References