Which outcome occurs when a qanat system collapses during construction?

💡 Explanation

A qanat collapse obstructs groundwater flow, creating a significant reduction in water availability because the system can no loger deliver water; therefore aquifer extraction at the source increases intensely, rather than reduced extraction in downstream locations.

• Which mechanism prevented collapse in Inca polygonal stonework walls?
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• Which outcome occurs due to hogging stresses in a wooden ship's hull during construction without adequate support?
• Which risk increased during antiquity when copper smelting lacked sufficient ventilation?