WORLD CIVILIZATION

Detailed explanation-1: -A falaj gets its water from underground sources like wells or wadis (valleys). It doesn’t use machines to extract water, but depends on gravity to force water to flow through its channels. This also controls how water is divided fairly and equally among different farms and surrounding areas.

Detailed explanation-2: -Al Aflaj is a traditional irrigation system which uses an underground tunnel to conduct water over long distances from an underground source to a basin, where the community can access it. The water flows by gradual gradient from highlands to flatlands, while the underground tunnels reduce evaporation.