Context
The special quality of the EU-funded project DREAM RRM Vienna (Danube River Research and Management Responsible River Modelling Centre) was to initiate the construction of a multifunctional and worldwide unique research infrastructure: The River Lab in the heart of Vienna, Austria, examines water-flow-dynamics and transportation of sediments in a 1:1 scale. The research results are highly applicable to EU-policymaking e.g. in the field of climate change (forecasts of natural disasters such as floods or droughts), waterway mobility (extending the duration of navigable waterways), agriculture, and environmental protection (e.g. preservation of the biological diversity). DREAM was designed and implemented as a cooperation project involving stakeholders from six regions in four EU Member States. In November 2025 it was awarded the new UNESCO Centre for Integrated River Research and Management by a unanimous decision of all 194 UNESCO Member States.
The uniqueness of the River Lab lies in enabling 1:1 scale experiments, while conventional small-scale laboratory models cannot adequately represent the complex interactions of flow, sediment, vegetation, and biota. The River Lab closes this gap by offering a large-scale, flexible, and physically realistic research facility. Its island location between the Danube and the Danube Canal enables gravity-driven water abstraction and realistic boundary conditions, supporting science-based decision-making for hydropower, navigation, flood protection, and ecological restoration.
Objectives
The primary objective of the BOKU River Lab is to deliver scientifically robust and policy-relevant solutions for sustainable river management under increasingly complex environmental conditions. It overcomes the limitations of traditional scaled models by enabling experiments at near-prototype scale (up to 1:1) with discharges of up to 10 m³/s under free-surface flow conditions. This allows realistic investigation of turbulent hydrodynamics, sediment transport, vegetation interactions, fish behaviour, and human safety during floods. The resulting high-quality data support evidence-based decision-making in hydropower optimisation, inland navigation, flood risk reduction, and ecological restoration. The River Lab also addresses societal concerns, including the drift risk of people during flood events, and promotes public understanding of river processes. A further objective is knowledge transfer through teaching, outreach, and professional training, strengthening capacities among scientists, engineers, policymakers, and the public. Beyond the national scale, the facility supports transboundary collaboration and contributes to international initiatives such as UNESCO’s World’s Large Rivers Initiative and the EUSDR DREAM flagship project.
Implementation
The implementation of the BOKU River Lab followed a structured, multi-phase approach to ensure efficiency, accountability, and high impact. Activities began with a feasibility study, followed by the submission and approval of four EU-funded projects and coordination of six national co-financiers. Planning comprised conceptual, submission, detailed, and tender phases, supported by Building Information Modelling and other digital tools for integrated design, conflict detection, and cross-disciplinary coordination. Tendering and contract awards followed EU-compliant procedures, ensuring cost-effectiveness through competitive procurement and continuous monitoring. Construction took place under challenging geotechnical conditions on an island between the Danube and the Danube Canal, requiring reinforced foundations, angled anchors, and extensive monitoring to protect surrounding infrastructure. A dedicated project organisation, with the Bundesimmobiliengesellschaft (BIG) responsible for planning, construction oversight, and reporting, worked closely with the BOKU team to ensure the facility met research needs. Trial operation allowed fine-tuning of hydraulic systems, instrumentation, and research protocols prior to regular operation. Continuous stakeholder engagement, combined with milestone tracking, key performance indicators, and digital monitoring, ensured timely delivery, efficient resource use, and the establishment of a sustainable, high-impact research infrastructure.