Earth’s Water Reservoirs. Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake.

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Presentation transcript:

Earth’s Water Reservoirs

Introduction What do you think of when you hear the word reservoir? Living in Utah, most of us will think of a man made lake that stores needed water. Many of us have been swimming, fishing, or boating at these reservoirs. Many places in the country and around the world do not have these reservoirs though. A reservoir is a place where substances are stored as part of a cycle. The water cycle has many places where water is stored. Name as many natural (not man-made) reservoirs of the water cycle as you can think of in your science journal:

Hypothesis Using the reservoirs you wrote in your science journal, create a pie chart of the amount of water you think is in each reservoir. Your pie chart needs one section for each reservoir you listed in your science journal. Each section should have a different color or pattern to it. Be sure to create a key. Also write what percentage of the water cycle each reservoir makes up. Remember that this is just a hypothesis, so be brave and take an educated guess.

Actual Data ReservoirsPercentagesFraction Oceans97%97/100 Icecaps/ Glaciers 2%2/100 Groundwater.7%.7/100 or 7/1000 Atmosphere.01%.01/100 or 1/10,000 Freshwater Lakes.3%.3/100 or 3/1,000 Saline lakes and inland seas.01%.01/100 or 1/10,000 Rivers.001%.001/100 or 1/100,000 Amount of water in Each Reservoir Create the actual pie chart of the reservoirs of the water cycle using the percentages to the right You need to have a key Write the percentages on the outside of your chart.

Questions 1. What percentage of the world’s water is salt water? 2. What percentage of the world’s water is in ice caps or glaciers? 3. What percent does that leave for fresh water? 4. With so much water in the world, why do we worry about water shortages? 5. Why would salt water have limited use to humans? 6. What surprised you about your hypothesis and the actual data? 7. Compare the two pie charts that you created. What about your hypothesis chart was correct?

What Reservoirs do we have in Utah? Lakes Rivers/streams Man-made reservoirs Precipitation Snow Rain Groundwater Alpine glaciers (become more rare)

Question How does water enter and from where? How long does it stay? How does it exit the reservoir and where does it go? How does it change the landscape? How does it affect biotic factors?