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.

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