Which structural failure was most common when constructing pre-Columbian agricultural terraces on steep Andean slopes?

💡 Explanation

When soil behind a terrace wall becomes saturated due to rainfall or irrigation, hydrostatic pressure increases because the water table rises and exerts a lateral force against the wall, often leading to its collapse. Therefore wall collapse results, rather than erosion, crop failure or landslides; which require different triggering events.

• Which structural consequence results from sustained freezing within the pozzolan concrete of a Roman aqueduct?
• Which structural vulnerability increased within late-Roman castra when defensive perimeters significantly expanded?
• Which geometrical problem did medieval Islamic algebra primarily aim to solve practically for land distribution?
• Which visual distortion arises when projecting celestial sphere from an astrolabe planispheric projection?
• Which outcome occurs when a Roman aqueduct siphon's discharge elevation is significantly higher than its intake elevation?
• Which limiting factor constrained widespread adoption of terrace farming by pre-Columbian Andean civilizations despite its erosion-reducing properties?