permeability/porosity/capillarity

what is permeabiltiy

the ability of water to flow into the soil

permeability rate

the speed at which water flows into the soil

what affects permeability

connected pore space

loose soil&larger particle size

large size soil particles have a ______ rate

high

small size soil particles have a ____ rate

low

as particle size increases, permeability

decreases

infiltration occurs if

*the soil has grass or plants

*precipitation is less than the permeability rate

*soil is unsaturated

the slope of the land is flat or haas a gentle slope

most surface water runoff occurs if

*the soil is bare or has no plants

*precipitation rate exceeds permeability rate

*soil is saturated and slope of land is too great

*soil particles are too small

once water infiltrates into the ground, it becomes

ground water

what occupies zones in the soil?

Ground Water

during heavy rain the table

rises

during little rain the tale

drops

what is porosity

the percentage of open space in a material compared to its total volume

porosity depends on

*shape of the soil particles

*packing

*sorting

round soil particles have ____porosity

more

angular soil particles have ___porosity

less

the greater the packing, the ____pore space

less

if all soil particles are the same size, they are ___

sorted

if they are sorted each sorted size has the ____porosity

same

if the sizes are mixed, the porosity is ____

less

retention

to hold water between the soil particles

small particles retain ____ water than large particles

more

what is capillarity

the upward movement of water through the soil

when the soil particles are small, the capillarity is ____

greatest

when the soil particles are large, the capillarity is ___

smallest

if the soil particles increase, the capillarity___

decreases

if the soil particles decrease, the capillarity___

increases

capillarity is an attractive force between

soil particles and the water

smaller the particles, _____ the upward movement

greater

larger the particles, ____the upward movement

smaller

capillarity____when particle size decreases

increases

which beaker has the greatest porosity? a beaker with sorted 3mm beads or a beaker with 20mm beads?

they have the same porosity

what happens to the porosity of the 20mm beads, when the 3mm beads are mixed into it?

the porosity decreases

which beaker has the greatest permeability? the 3mm beads or the 20mm beads?

the 20mm beads

which beaker has the greatest capillarity? the 3mm beads or the 20mm beads?

the 3mm beads

which beaker has the greatest infiltration? the 3mm beads or the 20mm beads?

the 20mm beads