Question

An irrigation channel irrigates a farm land, A is 120 (Hectare), for time period T = 20 (hr) to increase the moisture content of the porous soil in the roots zone from its Permanent Wilting Point, (wv)P%, to its Saturation Condition, (wv)s%. Its (wv)P% = 10%, (wv)F% = 30%, G = 1.4 and Gs = 2.8. Compute: 1. The drained moisture content from saturation condition, (wv)d% by the effect of gravity. 2. The depth of drained water, (dw)d.

Answer 1

The drained moisture content from saturation condition is 20%. The depth of drained water is 50.4 Hectare.

Step-by-step explanation:

In order to compute the drained moisture content from saturation condition, (wv)d%, we can use the equation:

(wv)d% = (wv)s% - (wv)F%

Substituting the given values, (wv)s% = 30% and (wv)F% = 10%, we get:

(wv)d% = 30% - 10% = 20%

So, the drained moisture content from saturation condition is 20%.

To calculate the depth of drained water, (dw)d, we can use the equation:

(dw)d = G x (wv)s% x A

Substituting the given values, G = 1.4, (wv)s% = 30%, and A = 120 Hectare, we get:

(dw)d = 1.4 x 30% x 120 Hectare = 50.4 Hectare

Therefore, the depth of drained water is 50.4 Hectare.