brain pop what happens to rainwater after it reaches the earth’s surface?
Post on 22-Mar-2016
77 Views
Preview:
DESCRIPTION
TRANSCRIPT
Brain pop
What happens to rainwater after it reaches the Earth’s surface?
Storage
Evaporation and Transpiration(Evapotranspiration)
Runoff
What’s it called when water is absorbed by the ground?
What happens to water after it infiltrates the ground?
Water occupies distinct zones
What do you need for infiltration to occur?
Think about factors that will allow water to INFILTRATE
Factors that Affect Infiltration1. Permeable2. Unsaturated3. Gentle (flat) slope of land4. Vegetation 5. Land Use6. Rate of precipitation less than
Infiltration
Factors that affect runoff
The ground must be porous and permeable
What happens to water after it infiltrates the ground?
Water occupies distinct zones
Water occupies distinct zones
http://earthguide.ucsd.edu/earthguide/diagrams/groundwater/index.html
water table animation
Where does our drinking water come from
We get our water from water towers.New York City gets their water from upstate reservoirs
People Drill wells for drinking water
Is ground water good to drink? YES because it is filtered as it sinks down.
Wells are drilled deep enough to reach water this varies throughout.Remember the water table rises and falls.
Wells are drilled deep enough to reach water this varies
throughout.Remember the water table rises
and falls. What if it runs dry? Dig deeper or
use less water.
Streams and GroundwaterEver wonder why many streams, rivers, ponds,
and lakes always have water in them even during dry periods? Where is the water coming from?
Because streams get water from the underground when it’s moist.
?
Excess water called?
Surplus: Excess amount of water flow. When?
Little or no water
Deficit: Decrease in water flow. When does this occur?
Discharge: Amount of water in a
body of water, rises and falls.
Where does the water go from runoff and small streams?
WATERSHED/ drainage Basin.
If it rains in Utica, into which body of water will
the runoff flow into?
How about Massena
WATERSHED/ drainage Basin.
Location A is in the zone of ___________?While location B is in the zone of ______?
A
B
How did the water get from A to B?
What characteristics of the soil allowed the water to move down?
When is the water able to infiltrate the soil?
The soil must have pores
When is the water able to infiltrate the soil?
The movement of water is controlled by the characteristics of the soil
Porosity
Which one has more pore spaces?
Which one has bigger pore spaces?
When is water able to infiltrate the soil?
Water is able to infiltrate when there are many openings or PORES.
Which one has more pore spaces?Which ones are bigger?
Porosity determines how much water or air a rock can hold.
Factors that affect porosity Now which one has more pore spaces?
The porosity of loose material such as soil depends on several things.
shapeuniformity of sizes
packing
The best particles are round, same size (well sorted), and loosely packed
So what type of soil does not have good porosity?
Flat Different sizesTightly packed
Important: Grain size has no effect on porosity as long as the shape is
the same and size is uniform.
Permeability: Speed at which water flows through soil. This increases
with bigger pore spaces
Here size does matter, bigger is better.
Which one has greater permeability
If you had a well what size particles would you want in your backyard
to increase permeability?
Which size would you not want?
http://techalive.mtu.edu/meec/module06/Percolation.html
permeability demo
Capillarity is the ability of water to move upward into tiny spaces between soil.
Water is able to move upward because of the attraction between water molecules and the surfaces of the soil particles.
This works best with small particles because there is more surface area to attach to.
Capillarity is the ability of water to move upward into tiny spaces between soil.
Water is able to move upward because of the attraction between water molecules and the surfaces of the soil particles.
This works best with small particles because there is more surface area to attach to.
Which one has the greatest capillarity, permeability, Porosity? Runoff? Infiltration
Monsoons
Monsoons: Seasonal Winds
Monsoons
During what time of year does this occur?
El Nino/La Nina:2048 × 1536 - barjackfishing.com
Name the Ocean Current located here
http://esminfo.prenhall.com/science/geoanimations/animations/26_NinoNina.html
el nino animation
Under Normal conditions, in the Pacific, cold water up-wells from the deep along the coast of south America.
During the winter around Christmas, there is a warm ocean current from the equator that invades and warms the water off S.A. for a month of so.
http://esminfo.prenhall.com/science/geoanimations/animations/26_NinoNina.html
el nino animation
List some factors that affect the climate of
an area Graph them
Which City would have a cooler winter? Which would have a warmer summer? Why
B.A.
What latitudes worldwide experience a mostly wet climate?
Why?
El Nino or Normal conditions?
Water occupies distinct zones
top related