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flag Jinan safeguards its 1,000 springs during subway expansion using real-time monitoring and precise engineering, maintaining continuous flow for 22 years.

flag Jinan, China’s “City of Springs,” is using high-precision geological surveys and real-time monitoring to protect its 1,000 natural springs while expanding its subway system. flag Engineers map underground water channels to guide subway planning, keeping lines and stations above critical water levels with a two- to three-meter buffer. flag Line 4 uses U-shaped pipes to divert groundwater without disrupting flow, while other measures avoid sensitive zones and water-bearing layers. flag A network of 213 monitoring stations tracks water levels, quality, and flow, enabling early warnings. flag These efforts have sustained continuous spring flow for 22 years, with Baotu Spring reaching its highest level since 1966—30.29 meters—after recent rains, showing successful integration of urban development and ecological preservation.

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