🌳 💦 Research by Marius Floriancic at ETH Zurich's "Waldlabor" confirms the "old water paradox": The majority of water in forest soils is surprisingly old! Five years of unique hydrology experiments reveal water's hidden journey. #Hydrology #ForestResearch

https://ethz.ch/en/news-and-events/eth-news/news/2025/05/old-water-new-insights.html

Old water, new insights

Five years ago, an experiment began at ETH Hönggerberg: researchers set up an outdoor laboratory in the forest near the campus. They used sensors positioned in trees, the soil and in a stream to study water dynamics and the “old water paradox”. ETH News accompanied the head of the experiment, Marius Floriancic.

ETH Zurich