Geoscience Reference
In-Depth Information
Figure 20.8 Growth in Las Vegas population.
(a) Graph show-
ing the growth of Las Vegas since 1900. Note the rapid increase
after 1950. (b) Satellite images showing the expansion of Las Vegas
between 1973 (left) and 2006 (right). The 1973 image shows an area
about 25 km (~16 mi) across.
2,000,000
1,800,000
1,600,000
1,400,000
1,200,000
1,000,000
800,000
600,000
400,000
200,000
0
1900
1920
1940
1960
1980
2000
Year
(a)
(b)
VISUAL CONCEPT CHECK
20.1
What is the most likely source of water used
in this fountain in Las Vegas?
a)
Groundwater
b)
Snowmelt from the Sierra Nevada
Mountains
c)
The Colorado River
d)
Rainfall
