Los Angeles Water Management Facts

The video explains how Los Angeles sources its water, focusing on the historical acquisition of Owens Valley and the construction of a 350-mile aqueduct. It highlights the engineering marvel of the aqueduct and the innovative use of shade balls in the Los Angeles reservoir to prevent evaporation and reduce the formation of carcinogens.

What is the primary purpose of the engineering marvel discussed in the video?

• To improve transportation

• To provide water to Los Angeles

• To generate electricity

• To enhance communication

Why did Los Angeles city officials secretly buy ranches in Owens Valley?

• To create a tourist attraction

• To establish a wildlife reserve

• To acquire water rights

• To build a new city

How long is the aqueduct that was constructed to bring water to Los Angeles?

• 450 miles

• 150 miles

• 350 miles

• 250 miles

What year did the water from Owens Valley first arrive in Los Angeles?

• 1903

• 1913

• 1923

• 1933

What fraction of Los Angeles' water is still provided by Owens Valley today?

• 3/4

• 1/2

• 1/3

• 1/4

What is the main purpose of the black plastic shade balls used in the Los Angeles reservoir?

• To decorate the reservoir

• To prevent fish from escaping

• To reduce water evaporation

• To enhance water flow

What potential carcinogen do the shade balls help to prevent?

• Bromate

• Nitrate

• Chlorine

• Fluoride

How many black plastic shade balls cover the Los Angeles reservoir?

• 96 million

• 76 million

• 56 million

• 116 million

What is the diameter of each black plastic shade ball used in the reservoir?

• 4 inches

• 3 inches

• 5 inches

• 2 inches

How much did Los Angeles spend on installing the shade balls?

• $44 million

• $34 million

• $24 million

• $14 million