A) Three tensiometers (1, 2, and 3) with respective water column (L) of 45 cm, 60 cm, and 90 cm are buried to a depth of 0.2 m, 0.4 m, and 0.6 m from the soil surface in a crop field to support irrigation. The installed tensiometers show gauge pressure readings of -50kPa, -40kPa, and -45kPa for a particular day. If the hydraulic head required for irrigation to commence is -10 m, would you recommend irrigation to meet the crop water needs for this day? Briefly explain your recommendation. B) You are part of a water treatment plant project for a township of 30, 000 people. Their daily water requirement is 100 liter/person. It is known that sand filter column thickness of 0.3 m is sufficient for the filter bed for filtration. The hydraulic conductivity of the available sand was 2 x 10 -5 m/sec. As part of your responsibilities, you are to determine the area of the filter bed needed under a hydrostatic pressure head of 0.7 m. Consider the flow to be vertically downward to an outlet. C) A soil column was collected from the field to determine the effect of soil layers on the flow dynamics of the soil. The column had two distinct layers. The top 35-cm layer was loamy sand and the bottom 40 cm layer was sandy loam. The saturated hydraulic conductivities of the loamy sand and the sandy loam layers were determined to be 3.87 cm h-1 and 7.59 cm h-1, respectively. Water was ponded at the top of the column to a depth of 10 cm and allowed to drip from the bottom of the column. Based on the given data, how would you describe the flow dynamics. Use a diagram to represent the hydraulic scenario.
A) Three tensiometers (1, 2, and 3) with respective water column (L) of 45 cm, 60 cm, and 90 cm are
buried to a depth of 0.2 m, 0.4 m, and 0.6 m from the soil surface in a crop field to support irrigation.
The installed tensiometers show gauge pressure readings of -50kPa, -40kPa, and -45kPa for a
particular day. If the hydraulic head required for irrigation to commence is -10 m, would you
recommend irrigation to meet the crop water needs for this day? Briefly explain your
recommendation.
B) You are part of a water treatment plant project for a township of 30, 000 people. Their daily water
requirement is 100 liter/person. It is known that sand filter column thickness of 0.3 m is sufficient
for the filter bed for filtration. The hydraulic conductivity of the available sand was 2 x 10 -5 m/sec.
As part of your responsibilities, you are to determine the area of the filter bed needed under a
hydrostatic pressure head of 0.7 m. Consider the flow to be vertically downward to an outlet.
C) A soil column was collected from the field to determine the effect of soil layers on the flow
dynamics of the soil. The column had two distinct layers. The top 35-cm layer was loamy sand and
the bottom 40 cm layer was sandy loam. The saturated hydraulic conductivities of the loamy sand
and the sandy loam layers were determined to be 3.87 cm h-1 and 7.59 cm h-1, respectively. Water
was ponded at the top of the column to a depth of 10 cm and allowed to drip from the bottom of
the column. Based on the given data, how would you describe the flow dynamics. Use a diagram
to represent the hydraulic scenario.
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