13.6 Problem Set

  1. The thermal diffusivity for a particular soil is 0.43 x 10-6 m2 s-1.
    1. What is the damping depth for the diurnal temperature wave?
    2. What is the damping depth for the annual temperature wave?
    3. At what depth is the amplitude of the annual temperature wave only 5% of the amplitude of the annual wave at the surface?
    4. What is the time lag (hr) between the occurrence of the daily maximum temperature at the surface and at 30-cm depth?

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