U.S. Freshwater Use

Name _____________________________________ Section _______

Assignment #2

U.S. Freshwater Use

In 2010, the population of the United States was approximately 309 million. According to the U.S. Geological Survey (USGS), the U.S. withdrew about a TOTAL of 355 billion gallons of freshwater per day for a variety of uses, and average per capita use was 1,150 gallons per day. Of that freshwater, 78% was from surface water withdrawals and 21% was from groundwater withdrawals. Read the 2-page USGS article (http://pubs.usgs.gov/fs/2014/3109/) and complete the assignment.

· Thermoelectric power plants (electricity) accounted for 45% of the total withdrawals

· Irrigation (of crops) accounted for 33%

· Public water supply accounted for 12%, and

· Industrial, livestock, and mining accounted for 10%

Use the information provided to complete this table (4 pts). Then answer the 2 questions.

Daily Water Use
	Electricity (45%)	Irrigation (Crops) (33%)	Public Water Supply (12%)	Industrial/ livestock/ mining (10%)
You (n = 1)	518 gal (a) ( = 1,150 gal x 45%)	380 gal (b) ( = 1,150 gal x 33%)	138 gal (c) ( = 1,150 gal x 12%)	115 gal (d) ( = 1,150 gal x 10%)
(A) Your class (n = 30)	__________ (= 518 x 30)	__________ (= 380 x 30)	__________ (= 138 x 30)	__________ (= 115 x 30)
(B) Tampa (n = 337,000)	__________ (= 518 x ??)	__________ (= 380 x ??)	__________ (= 138 x ??)	__________ (= 115 x ??)
United States	__________ (=355 billion gallons x 45%)	__________ (=355 billion gallons x 33%)	__________ (=355 billion gallons x 12%)	__________ (=355 billion gallons x 10%)

1. How many gallons of irrigation (crops) water use per day is

A) your class responsible for? (1 pt)

B) the city of Tampa responsible for (1pt)?

2. Describe one specific activity/behavior you personally can do that will reduce your daily water use in each of the 4 categories. (1 pt each)

A) Electricity

B) Irrigation (crops)

C) Public water supply

D) Industrial/livestock/mining