cc-by-4.0Barbeta, Adrià2025-04-292023-11-142023-11-14https://datakatalogi.helsinki.fi/handle/123456789/6841As part of a project to develop a common methodological framework for water sampling, extraction, and isotopic analysis to study vegetation water use, we conducted an informal survey of current practices.  A simple questionnaire via Google form was sent out to all members of the WATer isotopeS in the critical zONE (WATSON) European Cooperation in Science and Technology (COST) Action (#19120, 2020-2024) between July and September 2021. In this repository, we've included a brief write-up of this survey and the survey data. hydrologycritical zoneisotopeswaterdataset