ES Chapter 15 Freshwater resources with pictures

ES Chapter 15 Freshwater resources with pictures - Chapter...

Info icon This preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 15: Freshwater Resources Natural System, Human Impact and Conservation www.aw-bc.com/Withgott
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
A: Freshwater Systems glaciers icecaps underground aquifers rivers & lakes
Image of page 2
Wetlands diverse ecological systems slow runoff reduce flooding recharge aquifers filter pollutants combinations of freshwater and dry land marshes : plants are allowed to grow above water level swamps : same as marshes but present in forest areas bogs : ponds roughly covered by vegetation www.aw-bc.com/Withgott
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Lakes and Ponds open standing water ecosystems vary according to depth littoral zone~ shores benthic zone~ bottom of lake limnetic zone~ away from shores, top of lake profundal zone~ similar to benthic, no sunlight
Image of page 4
Diversity of Ecosystems in Lakes and Ponds www.aw-bc.com/Withgott
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Groundwater precipitation that percolates through the soil 20% of Earth's freshwater unequal distribution climate change causing water shortage
Image of page 6
Aquifers porous spongelike formation of rock, sand and gravel formed by zone of aeration: not completely saturated zone of saturation: saturated with water water table : limit between zones of aeriation and saturation confined aquifer : rain cannot get to it by filtration unconfined aquifer : no upper layer that confines it
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Average Water Usage world wide→ 170,616 gal/yr/person U.S.A.→ 509,000 gal/yr/person poor countries→ 16,425 gal/yr/person source: U.N. Environmental Program 2002
Image of page 8
Water Usage altering environmental systems dams canals diversions consumptive use ~ water is consumed irrigation nonconsumptive use ~ water is returned to the system after use hydroelectric
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Dam's Drawbacks risk of failure Three Gorges dam cracks and sedimenting blocks flow of water
Image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern