Wednesday, August 5, 2026

Kaub

Today, Red Baron read an article in the NYT about a water plan for America's once mighty Colorado River.

"Across the region, two decades of drought have reduced winter snowpack, which creates the majority of the river's flow. At the same time, warming temperatures caused by climate change have increased water losses from evaporation."

The now-reduced water flow has forced Federal Authorities to regulate the amount of water neighboring states may draw from the river in the future, which has major impacts on agriculture and industries in regions touched by the Colorado.

That resources become limited is a dramatic turning point for the US, where continuous growth still is a leitmotif.

Here in Europe, the ongoing heat wave and lack of rain have caused several rivers to show historically low water levels.

The Dreisam through Freiburg (©BZ)
The lack of water immediately catches your eye when you look at Freiburg's river, the Dreisam. Yesterday, at the measuring station upstream in Ebnet, the water level was 17 cm, while the average water level for the Dreisam at this point is 52 cm.

The Dreisam has disappeared a few kilometers upstream (©SWR)
No water to spare! Even Freiburg's tourist attraction, the Bächle are currently dry.

The situation is more dramatic for Europe's historical waterway, the Rhine River. The prolonged drought is causing the Rhine's water level to drop steadily. The proud and much-praised river is now nothing more than a trickle.

The critical situation at Kaub (©Die Zeit)
The levels near the historical site of Kaub are critical for Rhine waterway shipping. Yesterday the key gauge at the Kaub measuring station reached an all-time low of 24 cm, i.e., below the lowest level of 25 cm recorded in October 2018. The forecast from the Federal Institute of Hydrology for August 9 is 18 cm!

©Wikipedia
Marion Halft took this historical photo of the Kaub low water level in 2018. It was just under 30 cm on October 20, dropping to 25 cm on October 22. Pfalzgrafenstein Castle, a former toll station, is visible in the background.

For comparison: The so-called equivalent water level (GlW), where shipping around Kaub is unlimited, is 77 cm, while the average water level in the place over the year is 208 cm.
 
©SWR
Mind you, while 24 cm is today's officially measured water level, the navigation channel at Kaub, appropriately named "Wilder Gefähr (Wild Ferrying)", is much deeper. 

Still, at the equivalent water level (77 cm), the Gefähr is only 190 cm deep in some places. This means that at the actual water level of 24 cm, cargo ships presently have only 137 cm of water depth and therefore can be loaded only halfway or less.

According to the Rhineland-Palatinate Chamber of Industry and Commerce (IHK), "Below a water level of 40 cm (i.e. 153 cm depth) at Kaub, inland navigation is not feasible." Now ships can only operate with significantly reduced cargo volumes, which drives up costs. 

The IHK should not forget about international shipping of goods between Basel, Switzerland, and Rotterdam, the Netherlands. For large cargo ships to operate without restrictions, the water level must rise by more than one meter.


Red Baron is a history freak. So he relates Kaub to Field Marshal Forward, Gebhard Leberecht von Blücher's crossing of the Rhine River on New Year's Day 1814 in the pursuit of Napoleon.

While people were celebrating New Year's Eve across Europe, preparations began near Kaub for one of the largest military river crossings of that era (Read more).

Russian engineers of the First Silesian Army built a pontoon bridge in the cold and fog, and in secret, because the French were to find out as late as possible where Blücher intended to cross the Rhine on his way to Waterloo. Pfalzgrafenstein Castle served as an important base and bridgehead.


Over the next five days, an entire army crossed the Rhine, comprising about 50,000 soldiers, around 15,000 horses, and 182 artillery pieces.

It was a logistical feat.

©T-Online
In case the Rhine runs dry, future river cruises will be handled by a substitute bus service.
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