Water moves downward through the soil in a process called
A) runoff.
B) overland flow.
C) throughfall.
D) transpiration.
E) percolation.
Question 2
A water surplus occurs when
A) the potential evapotranspiration demand cannot be satisfied by precipitation inputs.
B) the additional inputs of water into a system are not enough to satisfy potential evapotranspiration.
C) potential evapotranspiration is greater than soil moisture.
D) additional water exists after potential evapotranspiration is satisfied by precipitation inputs.
E) all available surface water has evaporated.