Which risk increased when early Mesopotamian irrigation systems diverted river water containing suspended soil to enhance crop yields?

💡 Explanation

When water carrying dissolved salts evaporates from irrigated fields, salinization happens because the salts accumulate up in the soil inhibiting growth. Therefore increased salinity results, rather than altering any of the other conditions of reduced evaporation downstream nutrient issues or lower flows which require different mechanisms such as physical blockage or consumptive water usage.

• Which risk increased when Roman ballista siege engines replaced torsion springs with composite bow-like structures?
• Which structural phenomenon limited the maximum span of Roman concrete arches?
• Which mechanical consequence results when a 19th-century steam engine's cylinder lubrication system fails?
• During a Roman siege, which effect results from repeatedly impacting a city wall with a battering ram?
• Which risk increases when the rapid torsion spring assembly in a ballista-type siege engine exceeds yield strength limits?
• Which structural consequence arose when differential settlement occurred beneath Mesopotamian ziggurats constructed on alluvial plains?