Water CycleChristopher Kan

Lizzy SaxeIrene ChonJerry Heo

Condensation

• Water is in clouds as water vapor.

• Water clumps around dust.

• Clumps fall as rain

Precipitation

• Rain falls when the clouds aren’t too cold. If the ground is cold freezing rain may result.

• Hail falls when the clouds are cold and winds allow the hail ball to get bounced around in the cloud.

• Snow needs cold and relatively moist air to form.

Rain Shadow Effect

• Mountains cause clouds to rise and dump their rainfall on the approach side. This causes much less rainfall on the opposite side. A good example? Nevada.

Lakes and Rivers

• Only .3% of all of Earth’s water is in rivers and lakes.

• Many lakes and rivers are threatened by pollution from urban runoff and rural pesticides.

River Enviroments

• Fast moving headwaters are high in Oxygen and low in nutrients

• Middle Sections contribute biomatter and have healthy balance of oxygen and nutrients.

• Lowland flood plains include deltas and are slow, low in oxygen and high in nutrients.

Lake Ecology

• Littoral zone-Near shore most things live here most productive part of lake.

• Limnetic zone- Open water zone , little plant life, fish

• Eutrophic zone- Bottom feeders.• Lakes turn over in spring and fall and

cycle O2 to the bottom and nutrients to the top

Ground Water

• 30% of fresh water but only .009 of all the water on Earth.

• 50% of USA’s water supply is from the ground.

• Ground water is threatened by pollution• Ground water eventually flows to the ocean.

(Water flows to the lowest point) Percolates down!

Water Management

• Water conservation is needed. We could save 3.4 million acre-feet of water each year in Cal alone.

• Sewage Treatment is very important in preserving the environment.

Ocean Zones

• euphotic zone –Most life here, water evaporates back into clouds.

• Disphotic-same life here

• Aphotic-little life here

Pollution can cause dead zones!

Plants

• Major conduit for evaporation of water on land back to the clouds.

• 10% of all evaporation occurs through plants

• Called TRANSIPIRATION.

Summary

-Water evaporates to form clouds

-Rain falls

-Water runs back to ocean

-Repeat

Works cited• http://www.livescience.com/environment/weather_science.html• http://science.howstuffworks.com/weather6.htm• http://www.wisegeek.com/how-does-hail-form.htm• http://www.rcn27.dial.pipex.com/cloudsrus/snow.html• http://www.weatherpages.com/rainshadow/• http://ga.water.usgs.gov/edu/watercyclefreshstorage.html• http://findarticles.com/p/articles/mi_qa5378/is_200603/ai_n21389999• http://us.oneworld.net/issues/fisheries/-/article/new-report-shows-fish-from-lakes-rivers-contaminated-with-mercury• http://www.rivers.gov.au/model/rivertypes.htm.• http://network.earthday.net/profiles/blog/show?id=1734264%3ABlogPost%3A24017• http://www.waterencyclopedia.com/Oc-Po/Pollution-of-Groundwater.html• http://www.swrcb.ca.gov/ab885/docs/cswrcb_onsite_report.pdf• http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2008/09/08/financial/f000151D08.DTL&feed=rss.business• http://www.enchantedlearning.com/biomes/ocean/sunlit/• http://www.latimes.com/news/nationworld/nation/la-na-deadzone2-2008may02,0,1285619.story• http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/hyd/trsp.rxml• Condensation photo: http://www.delonghi-dehumidifier-shop.co.uk/contents/media/condensation.jpg• Ice: http://img.timeinc.net/time/photoessays/2007/antarctic_ice/antarctic_ice_02.jpg• Rain: www.freefoto.com/preview/16-05-76?ffid=16-05-76• Clouds: http://nathan.floorsix.com/images/previews/clouds.jpg• Mountain: www.flickr.com/photos/10709629@N02/973325884/• River: www.cc.gatech.edu/cpl/projects/graphcuttextures/• Pesticides: www.nfu100.com/x194.xml• Fast River: www.worldofstock.com/slides/NAU1343.jpg• Slow River: aphs.worldnomads.com/richie/6382/DSC09300.jpg• Delta: www.experiencewa.com/v5/poi/poi.aspx?poiId=8473• Canyon: http://www.oursaviorchurch.org/school/faculty/gthorp/?m=200705• Ocean: www.treehugger.com/2007/10/14-week/• Water treatment: www.cmtengr.com/ww_3_spi.htm• Water cycle: www.usgcrp.gov/.../ocp2003/ocpfy2003-fig5-1.htm• Water glass: http://hypnocize.ca/images/banner-water-glass.jpg• Lake: http://www.cowetafayetterealestate.com/