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The Joint Danube Survey 5 (JDS5), the world’s most comprehensive investigative surface-water monitoring effort, will officially kick off on 1 July 2025 in Vienna. This large-scale scientific survey will bring together experts from 14 countries to assess the health of the Danube River and its major tributaries.

The newly launched Danube Hydrological Information System (DanubeHIS) offers near real-time and validated long-term hydrological and meteorological data for the entire Danube basin. This system is instrumental in enhancing flood risk management and supporting water-related scientific research. Explore this valuable resource and its near real-time data capabilities to better understand and manage the complexities of the Danube basin.

Sub-basins are smaller working units within a larger river basin or catchment area. They represent a distinct geographical area that is delineated based on the natural drainage patterns of rivers and their tributaries. Sub-basins are used to facilitate the management and assessment of water resources, allowing for more focused and localized analysis and planning within the broader context of the overall river basin.