Water Movement in the Ground - Report Sheet

Name: ______Date: ______

Particle size (mm): 4mm

Height of beads (cm) ______

Experiment Theoretical 1 Wetting front travel time (sec) 3.6 sec 2 Permeability rate of flow (cm/sec) 23 cm/sec 3 Water required to fill pores (ml) 120 ml 4 Percent pore space 40% 5 Water recovered (ml) 106 ml 6 Water retained (ml) 14 ml

Particle size (mm): 7mm

Height of beads (cm) ______

Experiment Theoretical 1 Wetting front travel time (sec) 3.0 sec 2 Permeability rate of flow (cm/sec) 10 cm/sec 3 Water required to fill pores (ml) 120 ml 4 Percent pore space 40% 5 Water recovered (ml) 112 ml 6 Water retained (ml) 8 ml Particle size (mm): 12mm

Height of beads (cm) ______

Experiment Theoretical 1 Wetting front travel time (sec) 1.5 sec 2 Permeability rate of flow (cm/sec) 20 cm/sec 3 Water required to fill pores (ml) 120 ml 4 Percent pore space 40% 5 Water recovered (ml) 116 ml 6 Water retained (ml) 4 ml

Questions: Complete the following questions with complete and grammatically correct sentences.

1. What is the effect on increasing particle size on each of the following: a. Percent Pore Space:

b. Water Retained:

c. Time Necessary for Infiltration:

d. Rate of Infiltration:

2. If an area has a small sized particles in the upper soil, what is the effect on each of the following: a. Runoff:

b. Time of Infiltration:

c. Rate of Infiltration: 3. Compared to the tube of large particle size, predict what effect mixing the particle sizes in one tube will have on: a. Its Percentage Pore Space:

b. Its Permeability:

c. Its Amount of Water Retained:

4. Which size particle (4mm, 7mm, or 12 mm) will have the greatest capillarity? WHY?

5. How far underground can water infiltrate?

6. These go together: a. What kind of experimental error in doing this experiment could adversely affect a team’s results?

b. What data would be affected by that error named in 6(a)? AND, would that data result in an increase, decrease, or remain the same?

c. How would you change your procedure to reduce the error names in 6(a)?

7. Name all of the factors that control the amount of water that flows through the soil.