Presentation on theme: "Do Now! What is surface water? Give some examples of where it is located."— Presentation transcript:
Do Now! What is surface water? Give some examples of where it is located.
Agenda: Do Now Test Analysis Finish notes- Surface Water & groundwater Tracking Pollution: A Hazardous Whodunit **Bring your textbook tomorrow!
Surface Water: http://www.unwater.org/worldwaterday/animation_w atercycle_en.html http://www.unwater.org/worldwaterday/animation_w atercycle_en.html Surface water: fresh water on Earth’s surface Lakes, rivers, streams, wetlands River system:a network of streams that flow into larger rivers Provide drinking water, transportation, food Most major cities were built by surface water
Surface Water: Watershed: the area of land that is drained by a river Pollution anywhere in the watershed can affect the entire river system
Groundwater Groundwater: Water beneath the Earth’s surface- in sediment and rock formations Water drains through soil and porous rock until it reaches saturated and impermeable ground, where it collects The level of the saturated ground: water table Water table rises and falls. Flows toward low points Aquifer: An underground formation that contains groundwater; major source of drinking water
Groundwater Porosity: the percentage of a rock that has spaces in it Permeability: The ability of rock or soil to allow water to flow through it Most aquifers form in permeable materials Recharge zone: The area of the surface from which water drains to the aquifer Can take a long time to recharge an aquifer! Buildings/parking lots are impermeable and can reduce the size of the recharge zone.
Wells Wells: holes dug deep enough to reach an aquifer. More reliable than surface water because the water has been filtered as it moves through soil and rock. When water table drops, well might dry out