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Hydrology and Earth System Sciences (HESS) and Hydrology and Earth System Sciences Discussions (HESSD) are published under licence by Copernicus GmbH (Copernicus Publications). The licenser is EGU – European Geosciences Union GmbH, HRB 222584, county court Munich, Germany.

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Image credit to: Mod river basin, Jhabua, MP, India: Conrad Jackisch, 2006 Water Cycle: iStock.com/jack0m Excavation and sampling of a multi-tracer irrigation experiment in Hovelange, Luxembourg: Loes van Schaik and Conrad Jackisch, 2013 Level meter house: iStock.com/delectus The Mahakam Delta in East Kalimantan: iStock.com/MsLightBox

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