The image shows a one dimensional problem where water is entering and leaving a soil column that is Z m deep, has a volumetric water content of 0 and porosity o. Water enters as precipitation P [m/day], and leaves as evaporation E [m/day] and deep drainage D [m/day]. Which of the following equations for 0, the relative water content, is a sensible water balance equation (assuming constant density) for this problem? TE S,0 D P. N

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter8: Stresses In A Soil Mass
Section: Chapter Questions
Problem 8.14P
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The image shows a one dimensional problem where water is entering and leaving a soil column that is Z m deep, has a
volumetric water content of 0 and porosity p. Water enters as precipitation P [m/day], and leaves as evaporation E
[m/day] and deep drainage D [m/day].
Which of the following equations for 0, the relative water content, is a sensible water balance equation (assuming
constant density) for this problem?
TE
s,0
P.
Transcribed Image Text:The image shows a one dimensional problem where water is entering and leaving a soil column that is Z m deep, has a volumetric water content of 0 and porosity p. Water enters as precipitation P [m/day], and leaves as evaporation E [m/day] and deep drainage D [m/day]. Which of the following equations for 0, the relative water content, is a sensible water balance equation (assuming constant density) for this problem? TE s,0 P.
a. de
- =P – E - D
dt
b.
de
pZ –=P- E– D
dt
O c. de
: (Р-Е-D)ф
dt
O d.
de
Z==P- E-D
— Р—
dt
ds
фZ—-Р-Е-D
dt
е.
Transcribed Image Text:a. de - =P – E - D dt b. de pZ –=P- E– D dt O c. de : (Р-Е-D)ф dt O d. de Z==P- E-D — Р— dt ds фZ—-Р-Е-D dt е.
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