Calculate the time required (in years) for water to penetrate a layer of clay that is 40 cm deep when exposed to a hydraulic gradient of 1 cm/cm. The permeability of clay is 1x10-8 cm/sec. If there is 30 cm static head of water on the clay layer, how long will it take for moisture to penetrate the 40 cm clay layer (in years)?

The time required to penetrate the 40 cm clay layer is 126.82 years

Explanation:

Given:

Hydraulic gradient = 1

Permeability of clay

Time required to penetrate 40 cm clay layer,

  sec

But we have to find time in years,

  years

  years

Therefore, the time required to penetrate the 40 cm clay layer is 126.82 years

the average speed is 24.57 km/hr

6 cos 34, 6 sin 34 trig