Geo 101 Notes April 21
Geo 101 Notes April 21 GEO 101
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This 3 page Class Notes was uploaded by Carter Cox on Tuesday April 26, 2016. The Class Notes belongs to GEO 101 at University of Alabama - Tuscaloosa taught by Keene in Spring2015. Since its upload, it has received 18 views. For similar materials see Dynamic Earth in Geology at University of Alabama - Tuscaloosa.
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Date Created: 04/26/16
Geo Notes April 21 Beach Erosion - Jetty protect harbor entrance - Breakwater- decreases wave energy - Riprap – decrease wave erosion - Beach Nourishment o Bring in new sand Pollution and Destruction - Biggest effect on wetlands and coral reefs - Water chemistry changes - Sediment amounts - Construction Natural Destruction - Large and small storms cause damage in several ways o Winds o Waves Removal of dunes, wetlands, beaches o Storm surge Affected by tide, wind, air pressure o Waves + Surge= Hurricane Hydrologic Cycle - Circulation of earths water supply Groundwater - Rain water that sinks - Water trapped in rock during formation - Months to thousands of years Porosity - Percentage of pore space Permeability - Ease of flow between pores o Size, number, shape of conduits Aquifer- allows water to flow Aquitard- retards water flow Water Table - Follows land surface Darcy’s Law - More permeable = faster - Steep slope = faster Using Groundwater - Wells o Ordinary well o Seasonal Well o Artesian well Works like water tower - Spring o Place where groundwater naturally flows to the surface - Hot springs o Hot water comes to surface o Very deep groundwater forced up by pressure or pathway o Geothermal regions Magma near the earths surface Can humans deplete groundwater supplies? - Yes o Lowering the water table - Saline intrusion - Reversing flow - Land subsidence Groundwater Quality - Most is safe to drink - Soft water – salt - Hard water- calcium, magnesium - Hydrogen sulfide- rotten egg - Iron- rich Contamination - Septic tanks - Farm runoff - Mine runoff - Storage tanks - Industrial (small too) - Landfill Caves- created by groundwater Speleothems - calcium filled water - evaporate and deposits calcite - grows 1-2 mm/ year Soda Straw - Young stalactite - Hollow Stalactite - Not hollow - Water drips off end - Grows like icicle Stalagmites - Mound on floors of cave Both grow toward each other Flowstone - Sheets of water down falls Cave bacon Sinkhole - Cave collapse
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