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.

• In the design of historical astrolabes, which consequence resulted from inaccuracies in stereographic projection?
• Which consequence affected early camera obscura images when light intensity decreased?
• Which structural failure was most likely to occur if Roman concrete was cast without pozzolanic ash?
• Which outcome occurs when 18th-century Royal Navy shipbuilding oak is improperly seasoned?
• Which outcome directly resulted from optimizing hydraulic terracing systems by the Inca civilization?
• Which structural failure mode most critically challenged the integrity of elevated Roman aqueduct arches during seismic events?