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Our Water Resources. ENS102 3/10/2006. Review. How can we slow world population growth? Improving education - literacy health- reproductive, physical, mental, social family planning employment corporate investment in literacy in developing countries Family Planning counseling - PowerPoint PPT Presentation
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Our Water Resources
ENS1023/10/2006
Review
€
I =P × A ×T
S
• How can we slow world population growth?– Improving education - literacy
• health- reproductive, physical, mental, social• family planning• employment• corporate investment in literacy in developing countries
– Family Planning• counseling• pre and post natal care
– Investing in Social Security– Economic Security (alleviate poverty)
• more jobs (especially for women)• education for employment
– Education on resource management• greenbelt movement
• What is the current world population?
Quiz
• 1. What resource is “absolutely fundamental to life as we know it”.
• 2. What % of the Earth’s water is useable freshwater?a. 0.77% b. 2.5% c. 30% d. 70%
• 3. What is a rain shadow?• 4. The greatest consumer of water in society
today is:a. households; b. industry; c. agriculture
Water in the News?
• Let's visit the library news database.
Water - ecology & resource
• De 8:7 For the LORD your God is bringing you into a good land, a land of brooks of water, of fountains and springs, flowing forth in valleys and hills, (>600)
• Why did God create water?• What is the role of water in Creation?• The anthropic principle or “the functional
integrity of Creation” principle
What role does water play for organisms?
• hydration
• growth
• cleaning
• habitat
• majority of body
• cooling
Water - ecology & resource• Most of every living organism is water.
– ≈70%
substrate concentration
0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00
0.00
500.00
1000.00
1500.00
2000.00
high WATER CONCENTRATION
• Osmoregulation
• Solvent
• Specific heat
• Organismic balance
Water - ecology & resource• Most of the Earth is water.
– 71% of the earth’s surface
Water - ecology & resource• What roles does water play on Earth?
– Take 5 minutes, use your text, and make a list of the roles
• water cycle• irrigation• weather and climate• growth• energy• life sustaining
Water - ecology & resource• What roles does water play on Earth?
Water - ecology & resource• What roles does water play on Earth?
Water - ecology & resource• What roles does water play on Earth?
Water - ecology & resource• What roles does water play on Earth?
– A temperature and climate regulator• High specific heat (1 cal/g)
• High heat of freezing (80 cal/g)
• High heat of vaporization (540 cal/g)
– A weather machine in interaction with the sun.
• Water keeps the earth livable.
What role does water play for human society?
• Take 5 minutes, use your text, and make a list of the roles
Water - ecology & resource• What role does water play for humans?
– Physiological water • 2.3 liters per day
– Functional integrity of climate systems • 97.418 %
– Living water • 100 gallons/person/day (8%)
– Growing our food• 700 gallons/person/day
– Technological water - 970 gallons/person/d
Water - ecology & resource• What role does water play for humans?
– personal water
Lawns, etc. Toilets Bathing Laundry Dishes Drinking,cooking0
10
20
30
40
50
60
70
80
90
100 U.S. Family of 4
Water - ecology & resource• What role does water play for humans?
– Technological water - 970 gallons/person/d
metals power agriculture mining chemical paper other0
2
4
6
8
10
12
14
16
18
20
direct indirect
Water - ecology & resource• What role does water play for humans?
– 1770 gallons/person/day
Water Use in U.S.
Agriculture39%
Power production
34%
Industry21%
Residential6%
Water - ecology & resource• What role does water play for humans?
– 1770 gallons/person/day
Water - ecology & resource• The hydrological cycle
Principles of sustainability as related to water
• Ecosystems use sunlight as their main source of energy
• Ecosystems are built upon interrelationships not independence
• Ecosystems dispose of wastes and replenish nutrients by recycling
• Ecosystems, regulate the size of member populations
• Ecosystems, maintain (bio)diversity
For Monday
• Continue reading Chapter 7 and we will examine the state of our water resources from MN to around the world