Assuming equal amounts of precipitation and saturation, which soil could rain infiltrate the most readily? WHY?

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Presentation transcript:

Assuming equal amounts of precipitation and saturation, which soil could rain infiltrate the most readily? WHY?

Soil conditions determine if water infiltrates. Ground conditions change if size and shape of its particles change.

Permeability increases with particle size Which does water infiltrate fastest? These are defined in Reference Tables!

If the pores (spaces) between large particles are filled in with smaller particles permeability is also reduced. Pebbles w/ sand

Into which beaker will water infiltrate at the greatest rate? Larger sediments are more permeable!

As a rule, the slower water infiltrates, the slower it drains. Water Retention As a rule, the slower water infiltrates, the slower it drains. Easy in easy out!

Which beaker retains water most (requires the most time to leave)? Easy in, easy out! Which beaker retains water most (requires the most time to leave)?

Flatter particles are less permeable and will increase runoff. Round particles in soil (ex: sand or clay) Flat particles in soil (ex: desert soil)

Which ground is more permeable? Grains are larger! Grains are rounder

Which has more “surface” for water to stick to?

Capillarity Water is so sticky it can “climb” soil particles, moving up against gravity. Larger particles have less capillarity. Smaller particles have more capillarity.

The diagram represents four identical columns filled with sediments of uniform shape and packing. They are placed over empty glass beakers. If water is poured into each column, which will have the greatest RATE of infiltration? 1) A 2) B 3) C 4) D

The diagram represents four identical columns filled with sediments of uniform shape and packing. They are placed over empty glass beakers. If water drains from each column, which will require the most time for drainage? 1) A 2) B 3) C 4) D

The diagram represents four identical columns filled with sediments of uniform shape and packing. They are placed over empty glass beakers. If each beaker is filled with water, which column will display the greatest RATE of capillarity? 1) A 2) B 3) C 4) D