Which limitation primarily governed the path of early Mesopotamian canals?

💡 Explanation

Canals relied upon gravity for distributing irrigation water. The downslope water flow constraint limited placement choices, because elevation drops facilitated drainage from river to field, rather than locations requiring costly pumps.

• Which navigational error grows when observations through a sextant use an inaccurate artificial horizon?
• Which outcome occurs when a sailing ship's hull plating experiences accelerated corrosion due to galvanic action?
• Which risk increases when quenching ancient Chinese cast iron?
• Which consequence resulted from Byzantine diplomacy using staged mechanical displays?
• Which outcome occurs when the subgrade of a Roman road saturates?
• Which outcome resulted from the careful shaping of Inca stones to ensure tight joints?