Europe’s rivers are becoming an industrial bottleneck
The Rhine River (photo by Joshua Kettle on Unsplash)
Kaub is a small German town between Koblenz and Mainz that sits beside one of the shallowest sections of the Rhine. By 31 July, the officially calculated navigable water depth at Kaub had fallen to approximately 25 centimetres, equalling the previous low recorded in 2018. The river itself was around one metre deeper, but that additional depth lies below the level available for safe navigation.
Cargo vessels were still sailing, although many were operating at around 20% of capacity. Loads must be divided among more vessels, while low-water surcharges drive up freight costs.
Thyssenkrupp has slightly reduced blast-furnace production because of restricted raw-material supplies and suspended its own barge operations. Chemical producers including BASF, Covestro and Evonik are also exposed to higher transport costs and potential supply disruption.
The Rhine shipping crisis is part of a wider European problem. Low river levels are restricting freight, closing waterways, reducing hydropower production and depriving thermal power stations of sufficient cooling water.
Europe built much of its industrial economy around rivers as if they were fixed infrastructure. Increasing climate volatility is exposing the weakness in that assumption.
Why low water on the Rhine affects European industry
The Rhine and its connected waterways link North Sea ports, including Rotterdam and Antwerp, with manufacturing centres in Germany, France and Switzerland. The system carries fuel, chemicals, minerals, coal, containers and industrial raw materials into the European interior.
For companies such as BASF, the river is effectively part of the production system. Its vast Ludwigshafen chemical complex was designed around bulk deliveries by barge. When low water disrupted those supplies in 2018, the company was forced to reduce production.
The economic effect is not limited to large industrial centres in Germany. A similar vulnerability is appearing downstream in the Netherlands.
The municipality of Deventer has closed its inner port to shipping because the water level in the IJssel, a branch of the Rhine, is expected to fall below the threshold at which its lock may be operated safely.
The difference between the river and harbour levels is becoming so large that opening the lock would place excessive pressure on its gates. If they failed, much of the harbour could empty, affecting vessels, houseboats, flood defences and connected waterways.
The closure is economically significant for the eastern Netherlands. According to the Port of Deventer, it handles approximately one million tonnes of bulk cargo and around 1,000 vessels annually. Port-related companies account for 250 direct and approximately 2,000 indirect jobs, while the port estimates its economic contribution at €278 million.
Nearby, the Twente Canal has already become inaccessible to shipping. Rijkswaterstaat, the Dutch infrastructure and water-management agency, closed the locks at Eefde on 25 July and prohibited the extraction of canal water for crop irrigation. It said the measures were needed to prevent irreversible damage to flood defences, soil and nature.
The Netherlands may be famous for managing excess water, but its industrial waterways are increasingly being tested by scarcity as well.
European river drought is becoming a structural risk
Low-water periods have occurred throughout the Rhine’s recorded history. The change is in their increasing frequency and the scale of the economic exposure.
German navigation officials say periods of low water have become more frequent since the early 2000s. Hotter summers increase evaporation, prolonged dry periods reduce river flows and lower Alpine snowmelt weakens a natural reservoir that traditionally sustains the Rhine into summer.
This turns river drought from a seasonal inconvenience into a structural risk for European supply chains.
The same pressures are visible along the Danube. In Romania, flow at the country’s entry point on the river fell to 1,700 cubic metres per second in July, compared with an average of approximately 4,700 cubic metres per second for the month. Grain barges were left idle, ferry services were suspended and irrigation was restricted.
In Serbia, barges and tankers were operating at 30% to 40% of cargo capacity. Output from the country’s largest hydropower station, Djerdap 1, fell to around one-third of its average daily level.
The consequences extend beyond shipping. Hungary’s Paks nuclear power station, which normally generates nearly half the country’s electricity, was operating at less than half of its two-gigawatt capacity on 31 July. A complete shutdown was expected if Danube levels continued falling.
French utility EDF has also been affected. Low river levels caused an extended outage at its Chooz 2 reactor, while high water temperatures shut Golfech 2. EDF has earmarked €8.7 billion to help adapt its nuclear, hydroelectric and grid assets to higher temperatures.
Europe’s rivers simultaneously support freight, industry, agriculture, electricity generation and ecosystems. During a severe drought, those uses begin competing for the same diminishing resource.
AI river forecasting offers earlier warning
The first technological response is to improve visibility.
Germany has launched a national Low Water Information System, known as NIWIS, which consolidates daily data on river levels, groundwater and soil moisture from federal and state sources. It replaces a patchwork of regional systems and gives authorities and industrial users a clearer view of developing water shortages.
Commercial platforms are attempting to extend the warning period. EarthDaily’s RiverSat combines weather sources, historical data and machine-learning models to forecast river levels for industrial logistics.
The company says its system can provide forecasts up to 28 days ahead and predict the date of a minimum water level to within approximately one day. Those performance claims come from EarthDaily and have not been independently established in the information available to MTN.
Additional warning time could allow a manufacturer to accumulate raw materials, reserve extra vessels, redirect cargo to rail or adjust production schedules before transport capacity becomes critically constrained.
For logistics operators, the value of artificial intelligence is therefore not that it solves low water. It can potentially make the disruption more predictable and create time for companies to respond.
Shallow-draught vessels keep more cargo moving
The second response is physical adaptation.
Following the 2018 Rhine disruption, BASF and Stolt Tankers developed the Stolt Ludwigshafen, a chemical tanker designed specifically for low-water operation.
The vessel combines lightweight construction with a hydrodynamically optimised hull and a propulsion system adapted for shallow conditions. According to project financier KfW IPEX-Bank, it can carry 800 tonnes through Kaub at a gauge reading of 30 centimetres, corresponding to a water depth of approximately 1.6 metres.
At a Kaub gauge reading of 100 centimetres, its 2,300-tonne payload is around twice that of conventional inland vessels. The tanker entered operation in 2023, demonstrating that low-water adaptation has progressed beyond simulations and prototypes.
The question is how widely this approach can be deployed. Europe’s inland vessels have long replacement cycles, while different cargoes require different designs. Bespoke ships may be economically viable for an industrial group the size of BASF, but harder to justify for smaller shipping operators.
Even the most advanced shallow-draught vessel eventually reaches a physical limit.
A digital twin of Europe’s rivers
A third technological layer is still emerging. The EU-funded IDEATION project has developed a roadmap, reference architecture and use cases for a future digital twin of Europe’s inland waters, including rivers, lakes, reservoirs, wetlands, snow and ice. The intention is eventually to connect it with the European Digital Twin Ocean.
A mature European water digital twin could bring hydrological models, satellite observations and real-time environmental data into a shared digital representation.
Authorities could use the system to model how prolonged drought would affect navigation, electricity generation and regional water supplies. Industrial users might be able to identify emerging logistics bottlenecks, evaluate alternative transport routes and assess how water-allocation decisions in one part of a river basin affect operations elsewhere.
IDEATION has laid the groundwork for a future system; it has not produced an operational digital twin that is currently managing the Rhine. Any basin-scale model would also depend on reliable data and cooperation among countries that may have conflicting priorities during a drought.
Deeptech can improve resilience, but it can't create water
AI forecasting, digital twins and redesigned ships can make European river transport more resilient. They cannot guarantee that waterways will continue supporting the industrial model constructed around them.
Moving freight from barges to roads would require thousands of additional lorry journeys, increasing congestion, costs and emissions. Rail networks have limited spare capacity. Dredging and other physical interventions can damage ecosystems without addressing the underlying shortage of water.
Europe will be forced to learn to identify low-water events earlier and keep ships operating for longer. And if river drought becomes a recurring condition, manufacturers may have to reconsider inventories, transport networks, production processes and even the location of water-dependent industrial sites.
Deeptech may help Europe manage increasingly unreliable rivers. It cannot remove the risk of having built an industrial economy around water that is no longer guaranteed.
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