Aim: How does water move through the ground? Do now: Thinking back to our lesson on the water cycle,...
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Transcript of Aim: How does water move through the ground? Do now: Thinking back to our lesson on the water cycle,...
Aim: How does water move through the ground?
Do now: Thinking back to our lesson on the water cycle, which term would describe water moving into the ground?
•Precipitation infiltrates the ground to become part of the groundwater supply.
I. Source of Ground Water
What happens if water does
not infiltrate?
Water will infiltrate the ground if it is…
- Unsaturated: not filled with water.
- Permeable: allows water to flow through.
Water will not infiltrate the ground if it is…
- Saturated: filled with water.
- Impermeable: does not allow water to flow through.
II. Vocabulary
What happens if water does not infiltrate?
III. Factors that influence Infiltration and Run off
1.Slope (steep vs. gentle)
2.Soil Composition (sorted vs. mixed)
3.Rate of Precipitation (heavy rain vs. light rain)
4.Vegetation (many vs. few)
With the person sitting next to you, discuss how you think these four factors influence the amounts of infiltration and
run-off.
Leave two lines of space between each
Slope- Steeper slopes cause more run off
- Gentle slopes allow for more infiltration
Soil Composition
Sorted Particles allow for more
infiltration
Mixed Particles cause more run
off
Rate of Precipitation
Heavy Rain cause more run off
Light Rain allow for more infiltration
Many plants cause more infiltration
Vegetation
Few plants allow more run off
*roots create spaces for water
to infiltrate
Closure:
From the back table obtain the Infiltration Worksheet
(top bin)
• Groundwater's movement through the soil and rock depends on porosity
and permeability.
IV. The Influence of Soil
Pores
A. Porosity – how much open space there is in a rock/soil.
Sorted Sediment
Mixed Sediment
Pores
Has larger pore spaces and more openings.
Small sediments fills in spaces creating smaller spaces and less openings.
Porosity IS NOT affected by particle size when the
sediment is well sorted.
Each container has an equal volume of sediment and pore space.
B. Permeability – water flowing through soil.
- Depends on the size of sediments.
Fine Coarse= Slowly = Quickly
LINK
C. Capillarity ––The ability of water to rise in small openings.
Closure:
From the back table obtain the Permeability, Porosity, and Capillarity Class worksheet
(bottom bin)