Water covers over seventy percent of earth’s surface, but only about three percent of that water is available for human use as freshwater. The main source of freshwater is permanent ice sheets, which makes up sixty-nine percent of global freshwater. The remaining supply of global freshwater is divided between groundwater and underwater aquifers, but groundwater makes up only one percent of global freshwater. Underwater aquifers makes up thirty percent of freshwater and is where the majority of Texas’s water demand is satisfied.
There are many contributors to water usage, but agriculture, home use, and industry, occupy the top three spots of major water consumers. In 2010, the Texas Water Development Board reported that the agricultural sector made up 58 percent of water demand, nearly all due to agricultural irrigation (TWDB, 2013).
Corn is the most widely produced crop in the state of Texas, contributing over $1.2 billion to the state’s economy ever year. Statewide, over 301 million bushels of corn are produced every year, and of this corn, 65 to 70 percent is under irrigation (Texas Corn, 2012). Furthermore, roughly 40 percent of Texas corn goes to a single cause—ethanol (Texas Corn...
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Water Use for Ethanol Production. (2013). - Ethanol. Retrieved February 06, 2013, from http://web.extension.illinois.edu/ethanol/wateruse.cfm
Watershed. (n.d.). Watershed. Retrieved February 06, 2013, from http://water.me.vccs.edu/concepts/watershed.html
Watersheds. (2013, January 16). Home. Retrieved February 06, 2013, from http://water.epa.gov/type/watersheds/index.cfm
What is a watershed? (2013, May 23). Watersheds and Drainage Basins, Water Science for Schools. Retrieved February 06, 2013, from http://ga.water.usgs.gov/edu/watershed.html
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