isotoophüdroloogiat
Isotoophüdroloogiat is the study of water using isotopes. Isotopes are atoms of the same element that have different numbers of neutrons. In water, the most commonly studied isotopes are hydrogen and oxygen. The natural abundance of different isotopes of hydrogen (protium, deuterium, and tritium) and oxygen (oxygen-16, oxygen-17, and oxygen-18) varies depending on geographical location, climate, and the water cycle processes it has undergone.
By analyzing the isotopic composition of water samples, scientists can trace the origin and movement of water.