Reservoir inflows rise 60% as storage strengthens to 63% capacity in Iran
Iran’s water authorities reported a sharp rebound in dam inflows, with volumes jumping 60% year on year in the current water year that began September 23, according to the latest weekly water and electricity indicators cited by IRNA on April 26, 2026.
Total inflows into Iran’s reservoir system reached 30.85 billion cubic meters by April 26, up from 19.28 billion cubic meters in the same period last year and slightly above the 10-year average of 29.85 billion cubic meters, the report showed.
Outflows from dams stood at 17.51 billion cubic meters over the same period, marking a 5% increase from 16.70 billion cubic meters a year earlier, though still below the decade-long average of 21.19 billion cubic meters.
Reservoir storage climbed to 32.5 billion cubic meters, compared with 27.10 billion cubic meters last year, reflecting an 18% annual increase and sitting about 3% above the 10-year average of 31.27 billion cubic meters. The rise signals a gradual rebuilding of water reserves after prolonged hydrological stress.
Overall dam fill levels were reported at 63% nationwide, showing improved but uneven water availability across Iran’s river basins and reservoir network. The figures point to a system regaining balance, though still operating under structural pressure from long-term demand and climatic volatility.