International Regatta for Water Flow Measurements

Some 80 participants gathered in the Czech Republic from 13–15 September for an international ADCP (Acoustic Doppler Current Profiler) regatta to exchange knowledge and experience in water flow measurement methods. The regatta was organized by the Czech Republic Hydro-Meteorological Institute (CHMI) and sponsored by WMO in the framework of the Project on the Assessment of the Performance of Flow Measurement Instruments and Techniques, the so called Project X that is an activity of the Commission for Observation, Infrastructure and Information Systems (Infrastructure Commission). The exchange among the 30 regatta teams – from 11 European countries – revealed that they shared similar challenges and that new colleagues could often provide solutions.

Over the three days, the participants listened to expert and peer presentations and compared ADCP measurement results and shared their knowledge and best practices with colleagues. A full day was dedicated to field measurements of discharge in the river Thaya, where a steady flow was maintained for optimal conditions and comparison of data between devices and 30 teams. Results from the regatta were analysed by international experts using freely available software (e.g. QRevInt) that provides uncertainty data evaluation, among other features. In the end, discussion and brainstorming on the results gave valuable feedback for the wide range of ADCP users.

The event was successful in that it permitted participants to share information on ADCP regattas with a wider community of hydrological practitioners, as well as with the broader WMO community, and enhanced international cooperation and coordination. Participants also became familiar with the most up-to-date methods and processes in the field of ADCP discharge measurements and evaluations using the latest software and procedures, while gaining further understanding of ADCP performance and uncertainty.

The results of the regatta will be used in the Infrastructure Commission’s work to improve guidance on discharge measurements and to give new information on uncertainties in hydrological field measurements. WMO activities on hydrological standards is highly valuable and the Organization aims to promote similar events in other WMO Regions.

The event results and data, presentations and photos of the event are available at

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