foggara造句

• The palm groves are irrigated by a system of " foggara " s.
• The humidity of the oases is also used to supplement the water supply to the foggara.
• The foggara system was traditionally used, but has been in decline since the early twentieth century.
• In the foggara it condenses on the tunnel walls and the air passes out of the vertical shafts.
• The temperature gradient in the vertical shafts causes air to rise by natural convection, causing a draft to enter the foggara.
• The moist air of the agricultural area is drawn into the foggara in the opposite direction to the water run-off.
• David Mattingly reports foggara extending for hundreds of miles in the Garamantes area near Germa in Libya : " The channels were generally very narrow-less than 2 feet wide and 5 high-but some were several miles long, and in total some 600 foggara extended for hundreds of miles underground.
• David Mattingly reports foggara extending for hundreds of miles in the Garamantes area near Germa in Libya : " The channels were generally very narrow-less than 2 feet wide and 5 high-but some were several miles long, and in total some 600 foggara extended for hundreds of miles underground.