contestada

How many millimetres (equivalent depth) of water are
contained in a soil profile 1 metre deep if the mass water
content of the upper 400 mm depth is 15% and that of the
lower 600 mm is 20%. The bulk density in the upper layer is
1300 kg m- and in the lower layer is 1500 kg m-?. Assume Pw
= 1000 kg m’How much water does the soil contain (in
cubic
metres) per 1.5 hectares of land?
ri

Respuesta :

mickymike92

The equivalent depth of water in the soil is 270 mm and the volumetric water content of soil is 5625 cubic meter/ 1.5 hectare of soil.

How can equivalent depth of water in a soil be calculate?

The equivalent depth of water in a soil is calculated using the formula below:

  • equivalent depth of water = water content × depth of soil

The depth of soil profile 1 = 1 m = 1000 mm

The depth of soil profile 2 = 600 mm

Equivalent depth of water in the soil = 15% × 1000 mm + 20% × 600 mm

Equivalent depth of water in the soil = 150 mm + 120 mm

Equivalent depth of water in the soil = 270 mm of water

The volumetric water content of the soil is calculated using the formula below:

  • Volumetric water content = water content × bulk density of soil/density of water × height of soil

Height of soil profile 1 = 1 m

Height of soil profile 2 = 0.6 m

Volumetric water content of soil profile 1 = 15% × 1300/1000 × 1 m = 0.195 cubic meter/square metre of soil

Volumetric water content of soil profile 1 = 20% × 1500/1000 × 0.6 m = 0.18 cubic meter/square metre of soil

Total Volumetric water content of soil = 0.18 + 0.195 = 0.375 cubic meter/square metre of soil

Converting to cubic meter/hectare of soil:

0.375 cubic meter/square metre of soil

1.5 hectares = 15000 square metre

Volumetric water content of soil = 0.375 × 15000 cubic meter/ 1.5 hectare of soil

Volumetric water content of soil = 5625 cubic meter/ 1.5 hectare of soil

Therefore, the equivalent depth of water in the soil is 270 mm of water and the volumetric water content of soil is 5625 cubic meter/ 1.5 hectare of soil.

Learn more about soil water at: https://brainly.com/question/13605365

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