Ruud Bartholomeus works as a scientific researcher in hydrology on a solid freshwater supply in rural areas. He specialises in hydrological and physiological processes in the interplay between soil, plants and the atmosphere. In his PhD at VU University Amsterdam and KWR, he developed climate-sturdy links between water, oxygen and vegetation, as part of a model to predict the effects of climate change on the natural vegetation. From this expertise, he is involved in the development of the Water Indicator Agriculture and the Water Indicator Nature. Coordinating between the regional freshwater supply and demand is becoming an increasing focus in Ruud’s work. To do so, he combines scientific knowledge, technological solutions, such as sub-irrigation with (industrial) residual water and online coordination of climate-adaptive drainage, with the process of having water managers, drinking water companies, the industry and agriculture work together to achieve sufficient freshwater. On the Ecohydrology team, Ruud draws the research line on ‘Freshwater supply in rural areas’. Ruud is involved in setting up the Lumbricus programme, in which knowledge institutes and water managers work together on a climate-sturdy soil and water system. He is the theme coordinator of ‘Frugal with Freshwater’ in BTO Water in the Circular Economy. In addition, he is a member of the Evaporation workgroup of the Dutch Hydrological Association (NHV), from which he received the NHV Hydrology Award in 2009.