A 10m high soil column has a water table maintained at the bottom of the column. On top of the soil column, different boundary condition are applied such as covering it with an impermeable layer, applying rainfall or allowing evaporation. Determine the direction of a steady state water flow (upward, downward or no flow) in the soil column if the pore water pressure on the top of the soil column is measured as (i) -30kPa (ii) -98.1kPa (iii) -200kpa