U:6 L:4 Irrigation Systems Assessment

What is the main method of irrigation described in the text?

• Flood irrigation

• Pivot-based irrigation

• Sprinkler systems

• Drip irrigation

What shape do the irrigated fields create when viewed from above?

• Square patterns

• Rectangle patterns

• Circular patterns

• Triangle patterns

What is one advantage of pivot-based irrigation mentioned in the text?

• It is more expensive than other methods

• It creates square fields

• It uses less water than flood irrigation

• It requires more maintenance

In which regions are irrigation units commonly used?

• Riyadh and Jeddah

• Qasim, Ha'il, and Al-Kharj

• Mecca and Medina

• Tabuk and Abha

What type of crop is mainly grown in these irrigated fields?

• Corn

• Rice

• Wheat

• Soybeans

How large can these circular fields become in diameter?

• Up to a kilometer

• Up to 500 meters

• Up to 2 kilometers

• Up to 100 meters

Why is the Hail area particularly suitable for these irrigation systems?

• It has abundant water sources

• It has flat landscape

• It has rich soil

• It has high rainfall

Approximately how many irrigation units are currently in use according to the text?

• 10,000 units

• 12,500 units

• 15,000 units

• 20,000 units

What feature characterizes these farming areas in the desert?

• Square brown patches

• Distinctive green circles

• Long rectangular strips

• Random green patterns

How is the water distributed in this irrigation system?

• Through underground pipes

• Through surface channels

• Through a rotating long pipe

• Through manual spreading