Question

What's the problem with measuring subsurface water by digging troughs in the soil and measuring the volume of water discharged at the base of the slope?

A. subsurface runoff is typically underestimated because digging causes deeper percolation into the aquifer

B. the soil disturbance typically decreases hydraulic conductivity, resulting in an overestimation

C. digging changes the natural soil's ability to transmit water

D. digging troughs disrupts the force of gravity and water flow upward at a rate that exceeds gravitational pull downward

Answer 1

B. the soil disturbance typically decreases hydraulic conductivity, resulting in an overestimation

The digging method of soil for estmating the subsurface water is problem due to the water flowing from all sides to the dig area so that the water is overestimated.