During the Inca Empire road construction, which risk dramatically increased upon saturation after inadequate terracing?

💡 Explanation

The risk of slope instability would increase because water accumulation in inadequately terraced slopes increases pore pressure, thus reducing effective stress via Skempton's pore pressure parameter 'B' which destabilizes the mass; therefore slope failure is expected rather than silted canals.

• Which consequence arises when insufficient leveling causes foundation settling within the Taj Mahal's plinth?
• Which outcome limited the operational lifespan of the Saqqara Step Pyramid irrigation channels?
• Which outcome reduces aesthetic value due to sulfur exposure on sandstone containing embedded pietra dura?
• Which structural challenge complicated the construction of Brunel's SS Great Britain with its iron hull?
• Which consequence directly followed widespread water damage due to inadequate implementation of stepped terracing in ancient Inca highlands?
• Which risk increases for Viking longships when saturated ropes experience freezing temperatures?