B. A soil column is connected to a hanging water column apparatus and allowed to reach equilibrium (qw = 0) - see figure below. The soil surface is loosely covered with plastic so there is no evaporation. Calculate the matric potential and effective radius of water-filled pores at the top of the soil sample. hm = ? 10 cm niter membrane with abubblin pressure of -100 cm H,0 20 cm

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A: WE KNOWk=qLAhq=VolumeTimeVolume=55cm3time=3hr 15min=195min=195·60 sec

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.