Science Unit D
Chapter 10
Chapter 12
Bioremedation using living organisms to clean up contamination in land and water
Treating Waste Water
Power Staions-pour waste water into rivers which kills animals
Run-off- contaminates on streeets creats run-off(oil, other chemicals like salt)
Waste Water- excess nutrients that promote growth of aquatic animals and plants. they use up oxygen leaving no room for native fish to populate.
Habitat Destruction
Air Pollution
Factories
The Water Treatment Plant
1st Stage- water comes in system through screen that filters physical materials
2nd Step- Water is pumped into a holding tank where chemical is added to make the materials sink to bottom
Water passes through membrane filter to knock out any remaining solids
4th Stage- then they add chlorine that kills any remaining microoragnisms
this removes Giarada- organism that causes illnesess
the clean water is pumped to storage sites and then given to communities and buisnesses .
area where water fills in the tiny spaces of soil is a groundwater zone
Who Manages Our Water
federal,provincial,municiple and territorial
Ontario Water Rescources Act- limits watering lawn usage
transfer of water from great Lakes construction of wells the operation of wastewater treatment plants
Clean Water Act- mkakes community become aware of the water problem and find solutions to help stop it
Transpiration is the process of water evaporation from plants to leaves and animals exhale water vapour during respiration
Chapter 11
What Affects our Water Supply
Rising and Receding Water Tables . if there is not alot rain the water table will decrease in levels leaving an unsustainable amount of water while if ther'e alot the water table will increase causing floods which contaminate water.
FLOODING
DROUGHT- when there is little to no precipitation which results into a reducing water table
EARTHQUAKES- causes water to drop makes ground water cloudy
Obtaining Water Quality
water quality can be effected by physically,biological or chemical contaminants
we obtain the water we need from underground and above ground sources.
Water that is removed from our water systems must be treated and tested so its safe
Managing Our Water Systems
Different Ways of Treating Our Water Systems are The Septic System,Wetland Technology and The Waste Water Treatment Plant
Treating Testing Water Quality
after water is distributed they check the water just to be safe
samples are also taken from the treatment plant and given to scientists
Fators that Effect Water Quality
Biological - both visible(such as zebra mussels) and microscopic organisms( such as bacteria)
Chemical- disolved substances that come from natural processes (dissolving limestones) or human activity( dissolved road salt)
physical- all matrerials that don't dissolve in water (like as animals waste and plant debris)
Farmers use techniques to and participate in programs that and enhance watersheds like the Ontario Enviorementral Farm Plan
ice: 76%, ground water:23%, lakes/waterlands:0.34%, gaseous water:0.66%
Human Causes of Water Table Changes
Overuse of Wells
Farming and Industry Practices
they take out water from system then discharge wastewater when done. crop irrigationpower generation plants
Water Diversion and Export
bottled water takes out alot of water and they take water without putting it back and they ship it out to diff. countries.