11 3 water underground l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
11.3 Water Underground PowerPoint Presentation
Download Presentation
11.3 Water Underground

Loading in 2 Seconds...

play fullscreen
1 / 18

11.3 Water Underground - PowerPoint PPT Presentation


  • 344 Views
  • Uploaded on

11.3 Water Underground. p. 378-381. Objectives. Describe springs and how water moves through underground layers of soil and rock. Explain what an aquifer is and how people obtain water from an aquifer. . Engage/Explore . Spring water What was the original source of this water?

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about '11.3 Water Underground' - oshin


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
objectives
Objectives
  • Describe springs and how water moves through underground layers of soil and rock.
  • Explain what an aquifer is and how people obtain water from an aquifer.
engage explore
Engage/Explore
  • Spring water
  • What was the original source of this water?
  • Where does the water in springs and wells come from?
discover where does the water go
Discover - Where Does the Water Go?
  • Clear jar, pebbles, sand, water
  • P. 378
introduction
Introduction
  • P. 378
  • Digging a hole
underground layers
Underground Layers
  • Where does underground water come from?
  • Answer: Precipitation that soaks in the ground and trickles downward.
  • Water underground trickles down between particles of sol and through cracks and spaces in layers of rock.
slide7
Pores - different types of rock and soil have different-sized spaces.
  • Permeable - materials that allow water to easily pass through or permeate.
  • Examples of permeable materials are sand and gravel.
slide8
Impermeable - materials that water cannot pass through easily.
  • Examples of impermeable materials are clay and granite.
  • Saturated zone - the area of permeable rock or soil tat is totally filled or saturated with water.
slide9
Water table - the top of the saturated zone.
  • Unsaturated zone - the layer of rocks and soil above the water table.
layers underground
Layers Underground
  • What is different about the pores in the two pictures?
  • Which picture represents a permeable rock layer?
  • In this picture how do the pores differ above and below the water table?
aquifers
Aquifers
  • Aquifer - any underground layer of rock or sediment that holds water.
  • Size - small underground patch of to an area the size of several states.
aquifers12
Aquifers
  • The huge Ogallala aquifer lies beneath the plains of the west, from S. Dakota to Texas. It provides drinking water and water for crops and livestock.
aquifers13
Aquifers
  • The water in aquifer moves only a few centimeters a day which equals out to be about 10 meters a year. The movement depends largely on how steeply the aquifer slopes and how permeable the rocks are.
wells
Wells
  • People can obtain groundwater from an aquifer by drilling a well below the water table.
  • Fig. 12 - Compare the well and dry well.
wells15
Wells
  • History of wells
  • Dug by hand
  • Lined with brick or stone to keep the walls from collapsing.
  • Lowered and raised a bucket to brink up water.
  • Today, most are dug with well-drilling equipment.
wells16
Wells
  • Pumping water out of an aquifer lowers the water level near the well. If too much water is pumped out too fast, the well may run dry.
  • Then it may be necessary to dig deeper to reach the lowered water table or to wait for rainfall to refill the aquifer.
wells17
Wells
  • Recharge - New water that enters the aquifer from the surface.
  • Artesian well - a well in which water rises because of pressure within the aquifer.
bringing groundwater to the surface
Bringing Groundwater to the Surface
  • Springs - where the water table meets the ground surface, groundwater bubbles or flows out of cracks in the rock in places.