Find the period of time (days) it takes a plant community (a particular land cov

Question

Find the period of time (days) it takes a plant community (a particular land cover) with a 3' root zone to proceed to wilting point if the soil conditions are as follows: The soil porosity and effective saturation moisture content is 40%. The soil root zone has been recently recharged with a rainfall event to field capacity which is 15% for this soil. The wilting point moisture condition for this plant community and soil condition is 3%. Daily evapotranspiration potential (PET) is (1/4"/day).
Assume the plant community ET is the PET up to wilting and the water table is very deep.
2. For this same soil, if the water table is at 3' and soil moisture conditions are at field capacity, how much infiltration would it take to fully saturate the soil? Assume a 1' capillary fringe and a 3' capillary zone.
Find the period of time (days) it takes a plant community (a particular land cover) with a 3' root zone to proceed to wilting point if the soil conditions are as follows: The soil porosity and effective saturation moisture content is 40%. The soil root zone has been recently recharged with a rainfall event to field capacity which is 15% for this soil. The wilting point moisture condition for this plant community and soil condition is 3%. Daily evapotranspiration potential (PET) is (1/4"/day).
Assume the plant community ET is the PET up to wilting and the water table is very deep.
2. For this same soil, if the water table is at 3' and soil moisture conditions are at field capacity, how much infiltration would it take to fully saturate the soil? Assume a 1' capillary fringe and a 3' capillary zone.
Find the period of time (days) it takes a plant community (a particular land cover) with a 3' root zone to proceed to wilting point if the soil conditions are as follows: The soil porosity and effective saturation moisture content is 40%. The soil root zone has been recently recharged with a rainfall event to field capacity which is 15% for this soil. The wilting point moisture condition for this plant community and soil condition is 3%. Daily evapotranspiration potential (PET) is (1/4"/day).
Assume the plant community ET is the PET up to wilting and the water table is very deep.
2. For this same soil, if the water table is at 3' and soil moisture conditions are at field capacity, how much infiltration would it take to fully saturate the soil? Assume a 1' capillary fringe and a 3' capillary zone.

Explanation / Answer

n=(Ww/Ws)×(Yd÷Yw)

Ww÷Ws=n×(Yw÷Yd)

At saturation, field capacity(FC)=saturation capacoty

0.15=0.4×(Yw÷Yd)

Yd÷Yw=2.67

Available Moisture= (FC-PWP)*(Yd÷Yw)*d

=(0.15-0.03)×2.67×(3×12)"=11.5344"

Period of time taken=available moisture÷ET

=11.5344÷0.25

=46.13 days

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