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Recharge varies with geology, land cover and weather.", "A pumping well draws down the surrounding water table. The effect depends on withdrawal, recharge and aquifer properties.", "Persistent withdrawal beyond replenishment can lower groundwater levels. This schematic has no measured water-level scale." ], "mechanisms": [ { "label": "Water balance", "title": "The balance matters more than a single dry year.", "text": "Compare groundwater withdrawal with replenishment over a meaningful period. A local water-level trend needs an aquifer context, not just a rainfall total.", "flow": [ "Recharge", "Storage", "Withdrawal" ], "ref": 5 }, { "label": "Land & infrastructure", "title": "A falling water table can change the land above it.", "text": "Groundwater extraction and subsidence are linked in the Mekong Delta evidence. The rate and reversibility depend on local sediments and pumping history.", "flow": [ "Pumping", "Pressure change", "Compaction" ], "ref": 3 }, { "label": "Food & livelihoods", "title": "Water constraints can reach the cropping calendar.", "text": "The cited India study examines how groundwater depletion could affect cropping intensity. 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