Denmark’s hydrological challenge is a delicate balancing act: protecting groundwater-dependent drinking water, managing drought and flooding, and adapting to rising coastal and groundwater risks.
Denmark is often seen as a water-secure country, but its hydrological reality is more complex. The nation depends almost entirely on groundwater for drinking water, while also facing growing pressure from droughts, rising groundwater levels, coastal flooding, and pollution. In other words, Denmark’s water challenge is not simply about scarcity or abundance; it is about managing a highly connected system under climate stress.
Drought is becoming a more visible threat. Recent events in 2018 and 2022 caused serious agricultural losses, damaged ecosystems, and even affected infrastructure through soil subsidence. Because drought moves through the hydrological cycle step by step, from rainfall deficits to soil moisture, then to streamflow and groundwater, its impacts can linger long after a dry spell ends.
At the same time, Denmark is dealing with the opposite problem in some regions: high groundwater levels. Rising groundwater can flood basements, weaken infrastructure, reduce farmland usability, and complicate urban drainage. Evidence suggests that these issues are driven by a mix of wetter climate trends in parts of the country and local human factors such as abstraction patterns and sewer systems.
Coastal risk makes the picture even harder. Sea-level rise increases the likelihood of flooding and saltwater intrusion, both of which can undermine freshwater resources in low-lying areas. For a country with extensive coastline and shallow aquifers, this is not a marginal issue but a strategic one.
Water quality is another central concern. Denmark’s intensive agriculture, dense land use, and legacy contamination sites all create risks for groundwater quality, especially from nitrates and pesticides. Since drinking water comes almost entirely from groundwater, contamination control is as important as quantity management.
The most important lesson from Denmark is that water management must be integrated. Drought, groundwater, drainage, flooding, land use, and water quality are all connected. Denmark’s monitoring networks and national hydrological modelling provide a strong basis for this approach, but the long-term solution will depend on better coordination across agriculture, cities, infrastructure, and environmental regulation.
