Karez System and Agricultural Practices

The video explores the Karez irrigation system in Western China, highlighting its historical significance and engineering marvel. It describes how the system uses gravity to transport water from mountains to arid regions, preventing evaporation. The video also covers the challenges of maintaining the system and its vital role in supporting agriculture, particularly grape production, in the region.

What is the primary purpose of the Karez system in western China?

• To support tourism

• To provide water to arid regions

• To transport goods

• To generate electricity

How does the Karez system prevent water from evaporating?

• By using underground canals

• By storing water in reservoirs

• By covering wells with lids

• By using water tanks

What is a key feature of the Karez system that allows it to function without modern technology?

• Solar panels

• Electric pumps

• Wind turbines

• Gravity-fed water flow

What historical route is associated with the Great Valley nourished by the Karez system?

• The Silk Road

• The Spice Route

• The Inca Trail

• The Roman Road

What is one of the main challenges in maintaining the Karez system?

• Finding skilled workers

• High cost of materials

• Risky and difficult maintenance work

• Lack of government support

What is the main reason workers descend into the wells of the Karez system?

• To dredge out sediment and stabilize walls

• To collect water samples

• To repair electrical systems

• To install new pipelines

What percentage of crops in the region is irrigated by the Karez system?

• 30%

• 10%

• 50%

• 70%

What ancient crop is still cultivated in the region using the Karez system?

• Rice

• Olives

• Wheat

• Grapes

What method do farmers use to produce raisins in the region?

• Storing in cold storage

• Using mud-brick blocks to dehydrate grapes

• Boiling grapes in sugar syrup

• Sun drying on open fields