The Water Cycle

1
The Water Cycle

• Ellen Metzger
• BAESI
• Water in A Changing Climate
• July 2009

2
Water in the Earth System

• What are some reservoirs for water in the Earth
  system?
• What are some processes that move water through
  the Earth system?
• What is the source of energy for the water cycle?
  

3
Earths Water
http//oceanworld.tamu.edu/resources/environment-b
ook/Images/earthwheredistribution.gif
4
Freshwater Reservoirs
Source USGS
5
(No Transcript)
6
How do human activities affect the water cycle?
7
Human Activities and the Water Cycle

• Overuse of groundwater subsidence
• Paving
• Increased runoff
• Decreased infiltration and recharge
• Climate change melting polar ice,
• sea level rise, different patterns of
  precipitation
• Dams and reservoirs
• Channelization of streams, removal of flood
  plains

8
Urban Water Cycle

• Undeveloped area

• Urban area

http//www.nccwep.org/stormwater/stormwater101/run
off.php
9
Surface Water Watersheds
http//www.ducks.ca/resource/general/wetland/image
s/watrshed.jpg
10
Water Cycle ReservoirsResidence times
11
Groundwater

Source USGS
Terms Water table Aquifer
12
http//www.ec.gc.ca/Water/images/nature/grdwtr/a5f
3e-rev.gif
13
Overuse of Ground WaterCone of Depression
http//web.arc.losrios.edu/borougt/ConeOfDepressi
on.gif
14
Subsidence in Santa Clara Valley
Source USGS
15
Source USGS
16
Groundwater System Santa Clara Valley
http//www.museumca.org/creeks/images/GrndWtrP.gif
17
San Joaquin Valley Subsidence 1925-1977" From
USGS Professional Paper 1401-A/ Photo by Dick
Ireland, USGS, 1977