CHAPTER 15 - CHAPTER 15: FRESHWATER RESOURCES Central case:...

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CHAPTER 15: FRESHWATER RESOURCES Central case: colorado river o Dams: flood control, recreation, hydroelectric power o Irrigation Freshwater = 2.5% of all water o Most freshwater in glaciers, icecaps, underground aquifers o Groundwater = 1/5 of freshwater Water… o Redistributes heat o Erodes mt. o Builds river deltas o Maintains organisms and ecosystems o Shape civilization o Cause political conflicts Tributary: smaller river flowing into larger one Watershed: area of land drained by river and its tributaries Floodplain: area near river that are periodically flooded o Silt deposited – fertile o Riparian: fertile riverside Lake o Littoral zone: edge of water – shallow w/aquatic plants & invertebrates o Limnetic zone: where sun can penetrate shallow waters – photosynthesis and phytoplankton, zooplankton o Profundal zone: water that sunlight doesn’t reach (no plant life, less oxygen, fewer animals) o Benthic zone: extends along bottom of water body from shore to deepest point – many invertebrates in mud Oligotrohpic:
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CHAPTER 15 - CHAPTER 15: FRESHWATER RESOURCES Central case:...

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