Dry, hot summers are creating critical vulnerabilities for Dutch dikes and significantly disrupting vital river trade in Germany, as Europe grapples with the intensifying effects of climate change. The prolonged drought has pushed major rivers, including the Rhine, to record low levels, impacting shipping and leaving the Netherlands' crucial water defenses at risk.
In the Netherlands, where much of the land lies below sea level, patrols are monitoring dikes constructed from peat, a material that weakens considerably when dry. Peter van Duijvendijk, a flood defense manager at the Schieland en de Krimpenerwaard water corporation, explained that dry peat loses moisture, becoming less effective at holding back water. While no major issues have been reported thus far by the 140 volunteers checking approximately 60 miles of dikes, vigilance is maintained, potentially extending into the fall.
"The volunteers are our eyes and ears on the dike," van Duijvendijk said. He described the challenge of balancing the need to prevent winter floods with maintaining sufficient water levels for agriculture and canals during the summer.
Similar concerns are echoed in Germany, where the Rhine River, a major artery for European freight, has reached its lowest recorded level in Cologne, surpassing the previous record set in October 2018. Marcel Beck, a manager at RheinCargo, a port and freight transport company, stated that the low water levels have a "devastating impact" on shipping. Cargo ships that normally carry between 2,000 and 2,500 metric tons are now restricted to transporting only 400 to 600 tons, creating significant logistical challenges.
Beyond trade, the drought is affecting daily life and agriculture. In Nijmegen, Netherlands, a rusted bicycle and shopping cart have been exposed on the dried riverbed of the Waal, a main Dutch branch of the Rhine. Houseboats are left stranded, resting on the sandy riverbed. Frans Schilte, a houseboat owner, noted that these periods of low water have extended from about a month to nearly three months in recent years, attributing the situation to the "negative effect of climate change."
Farmers are also facing restrictions on irrigating their crops due to low water levels in canals. John Kusters, chair of the Netherlands Fruit Growers' Organization, described the current year as "extremely challenging" for growers. In some areas, water authorities have prohibited farmers from pumping water out of canals to water their crops, contributing to fears of smaller harvests and potential price increases for fruits and vegetables.
Vince Kaandorp, a groundwater hydrologist at Deltares, an independent Dutch water research institute, highlighted the challenge of water distribution throughout the seasons. While the Netherlands generally has sufficient water, it is not evenly spread. He suggested measures like planting hedges near rivers to slow water flow and allow it to seep deeper into the ground, aiding in water retention. Authorities are also exploring methods to transform soil into "sponges" that can better hold water year-round. However, the low-lying reclaimed lands in the western Netherlands are increasingly susceptible to salinity during droughts, posing further problems for farmers cultivating fruit and vegetables in the fertile soil.