IPEN Uses Isotope Analysis to Trace River Water Sources Amid El Niño and Glacier Melt

Peru's IPEN is applying isotope hydrology to distinguish rainfall from glacial melt contributions to river flows, a method critical for water resource management under El Niño and climate-driven glacier retreat. The analysis is part of ongoing scientific monitoring, not a new finding. It matters because it informs water security planning in a region highly vulnerable to hydrological variability.