Presentation on theme: "Water Resources. So… Water,Water,Water Average family uses 329 liters/day 75 liters/day is lost due to dripping faucets We rank 2 nd in the world."— Presentation transcript:
So… Water,Water,Water Average family uses 329 liters/day 75 liters/day is lost due to dripping faucets We rank 2 nd in the world for water consumption, behind the United States In total Canadians use 180 billion litres of water a day
Where does water come from? The water we drink everyday is accessed by using an aquifer Run-off water Groundwater Hydrologic Cycle
Water Facts Oceans cover 71% of Earth’s surface Ocean’s contain 96.5% of Earth’s water Almost 70% of the world’s fresh water is frozen in glaciers, permafrost, snow and ice Lakes and rivers contain about.25% of the world’s fresh water
Water Facts Canada has about 20-25 percent of the world’s fresh water 30% of all fresh water is underground At least 70% of the world’s fresh water is used for agriculture Most of the water used for agriculture can not be used again
An ideal water cycle: Once rain falls on the earth it goes to one of four places: Soaks into ground surfaces and becomes part of ground water, which feed streams and wetlands and supplies much of our drinking water It remains in lakes or top soils and eventually evaporates It is absorbed by vegetation and then transpires from the plant tissues It forms streams and rovers that eventually empty to the sea That is an IDEAL water cycle, however there are interruptions….
Water Pollution There are 3 main types of water pollution: 1.) Physical pollution-most obvious, forms of pollution in which we can see Can you name some types?
2.) Biological Contamination Refers to bacteria and viruses that enter lakes and rivers from various sources. The largest sources is from sewage from cities and towns. Most sewage is treated, but in some cases raw sewage enters our lakes and rivers without treatment (20% of Canadian cities put their raw sewage into lakes and rivers without treatment)
Chemical Pollution Most dangerous form. Chemical waste is often colorless odorless and tasteless in our water, so we may not even know that it is there. Sources include: herbicides, pesticides, fertilizers, human waste and animal manure. They are washed from farmers fields into rivers and lakes and get into our food supply. Ex. When consuming fish, we also consume chemicals. These chemicals build up in our systems over time and lead to disease.
“Save My Lake” Video:http://www.cbc.ca/documentaries/natu reofthings/video.html?ID=1867857094 Preview:http://www.cbc.ca/documentaries/n atureofthings/video.html?ID=1815517079
Assignment For your next assignment you will be working with a partner on a presentation that will help promote awareness of either water pollution or water conservation. You must keep track of your sources and document them in your presentation.
Assignment Your finished product will be out of 30 marks distributed as follows: Content /10 Organization /5 Presentation /10 Originality /5