GY 102 Topic 7 notes
GY 102 Topic 7 notes GY 102
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This 2 page Class Notes was uploaded by Conner Jones on Thursday April 7, 2016. The Class Notes belongs to GY 102 at University of Alabama - Tuscaloosa taught by Mary Pitts in Fall2014. Since its upload, it has received 22 views. For similar materials see Earth System Processes in Geography at University of Alabama - Tuscaloosa.
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Date Created: 04/07/16
Topic 7 – Water Water is a critical resource 71% of earth is covered by water 70% of our body mass by weight is water you can survive 50-60 days w/o food, only 2-3 days w/o water quantity equilibrium: 326 M cubic miles on earth hydrologic cycle circulation and transformation of water throughout the earth’s atmosphere, hydrosphere, cryosphere, lithosphere, and biosphere composed of currents of water, water vapor, ice and energy flowing continuously in an open plumbing system types of drought meteorological – slightly lower rainfalls and slightly higher temperatures than usual agricultural – higher temp and lower rainfalls has started to impact agriculture hydrologic – lake levels will fall, shrinking back of lakes and rivers (we see changes) socio-economic – we can see loss of infrastructure (trees dying, wildfires, fish dying) precipitation = actet (precip-deficit) + surplus +/- delta storage fresh water usage 1. thermoelectric power – 41% 2. irrigation – 37% 3. public and domestic – 12.6% 4. industrial – 5.2% 5. aquaculture – 2.5% 6. mining – 1.1% 7. livestock – 0.6% bonus question: what is the best land use for water quality protection? Answer: forest Question: what is the most common pollutant in the Tuscaloosa lakes? Answer: sediment How does groundwater contamination move? Down gradient Aquifer – a rock unit that can store and transmit water to a well or spring in useful amounts (porosity and permeability) porosity is amount of pore space calculated as a percent, 10-30% is high porosity permeability – how interconnected the pores are o primary – exists at the time rock is formed o secondary – develops over time o permeable allows water to move through o impermeable does not allow water to move through water is the only resource in which there is no substitute for
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