Landsat Helps Warn of Algae in Lakes, Rivers

What is the primary concern regarding cyanobacteria in water bodies?

• They consume too much oxygen.

• They produce toxins harmful to humans and animals.

• They block sunlight from reaching aquatic plants.

• They increase the water temperature.

How does Landsat identify algal blooms from space?

• By counting the number of fish in the water.

• By detecting the blue-green color reflected by cyanobacteria.

• By measuring the temperature of the water.

• By analyzing the water's pH level.

What is the main challenge in studying water bodies from space?

• The water bodies are too small to be detected.

• Only a small fraction of sunlight is reflected back to the satellite.

• The water bodies are constantly moving.

• The satellites cannot differentiate between different types of water bodies.

What is the purpose of atmospheric corrections in satellite data processing?

• To enhance the color of the images.

• To remove false signals caused by atmospheric scattering.

• To increase the speed of data transmission.

• To adjust the satellite's orbit.

What is one of the benefits of using Landsat data for monitoring algal blooms?

• It provides real-time data on fish populations.

• It offers high-resolution data that can pinpoint specific locations.

• It can predict weather patterns.

• It measures the salinity of the water.

How did satellite data help during the 2017 algal bloom outbreak in Utah?

• It gave an early warning that saved healthcare costs.

• It identified new species of algae.

• It predicted the exact duration of the bloom.

• It provided a real-time video feed of the lakes.

What other environmental phenomena can Landsat data monitor besides algal blooms?

• Volcanic eruptions

• Tornadoes

• Wildfires and snow cover

• Earthquakes