H Unsaturated flow

Question 1

adsorption force

Answer 1

electrostatic forces
water creates a film around grains

Question 2

soil zone

Answer 2

below the surface, infiltration from the surface but water can also move upwards as it is evaporated

Question 3

intermediate zone flow

Answer 3

downwards via percolation

Question 4

saturation ratio 1 means

Answer 4

fully saturated

Question 5

underpressured

Answer 5

pressure in the unsaturated zone is less than at the water table

Question 6

water table is position where

Answer 6

the water surface has the same pressure to the atmosphere

Question 7

moisture potential

Answer 7

soil-water attraction
underpressure

Question 8

moisture potential is inversely proportional to

Answer 8

moisture content

Question 9

in wet soil gravity potential is

Answer 9

bigger than moisture potential

Question 10

in dry soils gravity potential is

Answer 10

smaller the moisture potential

Question 11

hysteresis

Answer 11

moisture potential is lower for wetting material than for drying material

Question 12

residual water

Answer 12

the little water that is present but can’t flow