Which risk increased because intensive chinampa farming lowered shallow lakebeds?

💡 Explanation

Intensive seasonal drainage of Xochimilco chinampas in Mesoamerica increased saltwater intrusion, leading to higher salinity through capillary action. Therefore, salinity increased, because topsoil evaporated, transporting brine upwards, rather than more moisture, leading to less disease.

• Which risk increased for Roman fortifications employing the 'agger' earthwork ramp when soil moisture became saturated behind the palisade?
• Which navigational consequence arises when Viking longship sails experience excessive heeling?
• Which outcome occurred when Viking longships experienced significant swells?
• Which consequence emerged following the 7th-century use of Greek Fire by Byzantine warships on the Bosphorus?
• During initial operation, which risk increased for new Roman aqueducts subjected to high flow?
• Which consequence followed from replacing overlapping planks with flush-laid planks on Viking longships?