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Laborversuche in einer Strömungsrinne mit skalierter Modelldüne (EbbSF)

Anhand von Experimenten im physikalischen Modell wurden durch Bodenformen verursachte Strömungs- und Turbulenzprozesse untersucht. Hierzu wurden Laborversuche in einer Strömungsumlaufrinne mit abstrahierten Modelldünen durchgeführt. Für die Erhebung eines umfangreichen Datensatzes zur Beschreibung des Strömungsfeldes über einer Bodenform wurde eine Modelldüne eingesetzt, deren Geometrie sich an in der Weser beobachteten Dünen mit sogenanntem Ebb Slip Face (EbbSF) orientiert. Die Dünenabmessungen und hydrodynamischen Größen wurden im Maßstab 1:10 nach Froude skaliert. Die Modelldüne wurde als zweidimensionale Einzeldüne eingebaut und einer unidirektionalen Strömung konstanter Geschwindigkeit und gleichbleibendem Wasserstand ausgesetzt. Durch die Verwendung von Riffelblech für die Herstellung der Modelldüne wurde die natürliche Oberflächenrauheit realer Dünen nicht nachgebildet. Für die Strömungsmessungen wurde im Bereich über und hinter dem Modellkörper eine enge Verteilung der Messpositionen gewählt, sodass ein umfassender Rohdatensatz mit hochfrequenten, akustischen Strömungsdaten bereitgestellt wird. Literatur: - Carstensen, C., Holzwarth, I. (2023): Flow and Turbulence over an Estuarine Dune – Large-Scale Flume Experiments. Die Küste. https://doi.org/10.18171/1.093103 - Bundesanstalt für Wasserbau (2021): FAUST. Teilprojekt E: Laboruntersuchungen BAW. FuE-Abschlussbericht B3955.02.04.70230. https://hdl.handle.net/20.500.11970/108336 Zitat für diesen Datensatz (Daten DOI): - Bundesanstalt für Wasserbau (2021): Laborversuche in einer Strömungsrinne mit skalierter Modelldüne (EbbSF) [Data set]. Bundesanstalt für Wasserbau. https://doi.org/10.48437/02.2021.K.9900.0001

Digital sufficiency: A new perspective on digitalisation as a driver for sustainability?

The world is entering a digital era that changes everyday business practices and lifestyles. Digital technologies are said to support sustainable development and create untapped potentials in many areas, for instance, by reducing energy and resource consumption. However, social and ecological drawbacks have become much more apparent where digitalisation has not lived up to its ascribed potentials. Over the past years, voices have become louder advocating for a green and digital twin transition. Similarly, the European Commission has supported the twin transition by setting it as a priority in line with the European Green Deal. This report presents project findings on how to support the twin transition through a concept of digital sufficiency. A premise of sufficiency as a guiding principle for the digital transformation is that technological innovation alone cannot solve societal problems. Unsustainable practices and behaviours must be either reduced or replaced by sustainable alternatives. The aim of this report is to support the German government’s position in EU debates and to formulate recommendations for priorities for action, which the government can link to the activities of the European Commission. This is done by drawing on an analysis of the role of the German Council Presidency in supporting the twin transition in Europe, both an online survey and an expert workshop on digital sufficiency as well as a literature analysis to deepen some of the expert discussions. Our analyses find that although digital sufficiency has potentials to bring new perspectives into existing debates, work on the concept is still in its infancy. Future work needs to frame the concept and link it to existing policy debates to make it relevant for policy. This report provides the first building block towards carrying out this work and outlines policy recommendations towards supporting the twin transition through digital sufficiency.

Governing artificial intelligence for planetary health

Establishing global governance of artificial intelligence (AI) is becoming an increasingly pressing challenge to ensure the provision of global public goods and to mitigate harmful effects on societies and the planet. Current debates around AI take various forms, follow diverse narratives, and centre variously on economic, social, environmental, or safety aspects. Here, we make three contributions. First, we classify risks and challenges of AI across the social, planetary, and safety domains. Second, we show that AI should be governed as a global commons, requiring coordinated interventions across all three domains, reflecting relevant inter-domain feedback loops, and root drivers, such as the pursuit of monopolistic AI power and the AI-infused media environment. Third, we identify data, energy, and compute as relevant regulatory dimensions across social, planetary, and safety domains. We conclude by emphasising the importance of limiting agentic AI, incentivising depolarising algorithms on social media, and setting AI dynamics within the context of global equity.© 2026 The Author(s)

Advancing optical earth observation for EU policies: needs, opportunities, recommendations

The effective translation of Earth observation (EO) measurements into actionable information for agriculture and land monitoring is critical to support policy implementation on climate, environment, and sustainable development. However, this translation remains challenging, as EO evolves from an awareness-raising instrument into an operational tool for evidence-based policymaking. To address this gap, we systematically link, for the first time, European Union (EU) land-related agricultural and environmental policies to EO-derived variables that can be generated from enhanced optical satellites expected in the next decade. We present a comprehensive framework for assessing the technology readiness levels (TRLs) of EO variables used to map, monitor, and manage crop, forest, soil, mineral, and water resources, thereby facilitating policy implementation and compliance. Upcoming Copernicus Hyperspectral Imaging Mission for the Environment (CHIME), and the Sentinel-2 Next Generation (S2NG) missions, both developed by the European Space Agency (ESA), will deliver substantial technological advancements for high-level EO-based products, enabling applications such as plant nitrogen and soil organic carbon content (SOC) estimation, species identification, and water quality characterization. Realizing the full potential of CHIME and S2NG for agricultural and environmental policy implementation will require advancing current products from prototype stages (TRL 4–6) to full operational readiness (TRL 9) through robust science-policy interfaces. Within such interfaces, we recommend exploiting existing (hyperspectral) EO data and time series, strengthening in-situ observations for robust model development and validation, and testing synergies between systems. Co-design of tailored products with policymakers is then essential to refine algorithms and align EO outputs with regulatory needs and scales. Upcoming spaceborne imaging spectroscopy and enhanced multispectral data streams thus have the potential to become game-changers and indispensable tools for EU policy implementation, providing greater traceability of key environmental and agricultural processes. © The Author(s) 2026

Baustelleninformation der Stadt Bremerhaven

Informationen über aktuelle und geplante Baustellen mit starker oder leichter Beeinträchtigung.

Climate and environmental targeting of the new EU budget for 2028–2034 overestimated

For the EU Multiannual Financial Framework 2028–34, the system of intervention areas (IA) with their climate and environmental coefficients is central to financing environmental and climate-related measures. The Commission’s proposal is analyzed for selected IA, and policy options are outlined. The analysis shows that the COM proposal overestimates positive environmental impacts by assigning excessively high coefficients to many IA. Selected IA that contribute to this overestimation—such as direct payments to farmers—are examined as examples. A targeted adjustment of the instrument could help to reflect climate and environmental objectives more realistically and achieve them more effectively.

A post-2030 climate policy framework fit for reaching the EU climate targets

The paper proposes a post-2030 EU climate policy architecture capable of achieving the EU’s climate goals. It reviews the EU climate targets, e.g. the amended European Climate Law, which introduced a 2040 interim target. The paper assesses the current policy framework and identifies key priorities such as stronger coordination and policy coherence. It recommends reforms to major climate instruments, including the EU Emissions Trading System, the Effort Sharing Regulation, and the carbon removal framework, while addressing challenges related to energy, economic transition, sustainability, and the social and international dimensions of EU climate policy.

Entwicklung einer nationalen und regional aufgelösten Obergrenze für reaktiven Stickstoff

Digitaler hydromorphologischer Zwilling des trilateralen Wattenmeeres (TrilaWatt)

TrilaWatt entwickelt eine innovative digitale Geodaten- und Analyse-Infrastruktur für das trilaterale Wattenmeer. Sie unterstützt mit harmonisierten, qualitätsgesicherten Daten zu Geomorphologie, Sedimentologie und Hydrodynamik die Planung und Unterhaltung der Verkehrsinfrastruktur. Geodaten, Analyse- und Dokumentationsmethoden werden über Webportale und -dienste zu einem Assistenzsystem verknüpft.

Acting globally - internationale Aktivitäten des Umweltbundesamtes

Diese Broschüre gibt einen Überblick über die Arbeitsweise des Umweltbundesamts, seine wichtigsten Funktionen und Aufgaben im internationalen Kontext. Sie stellt beispielhaft wichtige Abkommen, Programme und Vereinbarungen vor und macht deutlich, wie Deutschland sich innerhalb der EU und international für den Schutz von Gesundheit, Umwelt und Klima engagiert. Quelle: www.umweltbundesamt.de

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