IAEA Establishes Lake Isotope Network: Water Levels Are Dropping—How to Determine Whether It Is Evaporation or Reduced Inflow?
The same drop in water level can mean a lake is losing water from different sources. A water gauge can record how much the lake surface has fallen, but it is difficult for the reading alone to tell managers where the water went. Sustained high temperatures increase evaporation, lower upstream precipitation reduces river inflow, and basin water withdrawals and groundwater exchange can also alter lake water volume. Several of these processes may occur simultaneously. To decide whether to prioritize adjusting upstream water withdrawals or strengthening dry-season water supply reserves, it is necessary to know which change has the greatest impact on lake water volume. On November 3, the International Atomic Energy Agency (IAEA) announced the establishment of the Global Network of Isotopes in Lakes (GNIL)...
2026-11-11
