Which outcome occurs due to seasonal Mesopotamian river siltation?

💡 Explanation

Reduced crop productivity follows because, over time, silt accumulation decreases *channel capacity*, increasing flood risk and decreasing water reaching fields; therefore long-term yields drop, rather than increase by constant nutrient replenishment and better transport efficiency from cleared channels.

• Which consequence resulted from decreased water supply influencing the Persian wheel irrigation systems during the Mughal Empire?
• Which outcome increases when water velocity diminishes in Roman aqueducts?
• What risk increased when medieval timber bridges experienced increased traffic?
• Which risk increased in Byzantine mosaics that used experimental enamel?
• Which limitation restricted the use of brass astrolabes for high-precision stellar observations in medieval observatories?
• Which mechanical risk increased for builders scaling Inca dry-stone walls?