Which structural problem increases upon Inca terracing subject after substantial rainfall?

💡 Explanation

Channel avulsion and surface runoff increase, because water infiltration saturates the terrace soil, causing hydraulic head instability within retaining walls that support each terrace. Therefore, channels erode, rather than remaining stable as with proper drainage.

• Which increased risk occurred when Song Dynasty ironworkers cast early cannon barrels from a non-homogeneous mix?
• Which limiting visual distortion results when light dispersion occurs through early Islamic lenses?
• Which outcome predictably occurred when medieval rope bridges experienced sustained high humidity?
• Which risk increases when a 18th-century navigator sights the sun using a sextant with a warped index mirror?
• Which risk increases with excessive lye bathing during historical soap production?
• Which outcome results when a medieval castle's defensive ditch experiences seasonal freezing?