Glisholm Sø

A Modern Solution to Ancient Challenges

Glisholm Sø stands as Odense's largest lake, a deliberately engineered landscape that addresses one of Denmark's most pressing urban challenges: stormwater management and flood prevention. Constructed between 2015 and 2016 at a cost of 8.5 million Danish kroner, this 70,600 square meter water body serves as one of the city's most significant rainwater basins. The lake's creation was driven by a critical need: the Lindved Å stream, which flows through southern Odense, was vulnerable to catastrophic overflow during heavy rainfall, threatening residential areas south of the city with dangerous flooding.

Engineering Nature for Urban Resilience

The lake functions as an intelligent buffer system, capturing and temporarily storing excess rainwater during intense storms. By holding this water, Glisholm Sø prevents the Lindved Å from overflowing its banks and protects the neighborhoods downstream from inundation. This climate adaptation strategy represents a shift in urban planning—rather than simply channeling water away, the design works with natural processes to manage it sustainably. The lake is equipped with a sand trap that filters sediment, gravel, and oil residues carried by rainwater from roads and pavements, maintaining water quality and keeping the lake clean. The entire site, including surrounding natural areas, encompasses 127,000 square meters, creating a substantial green space within the urban fabric.

A Living Ecosystem Emerges

Beyond its engineering purpose, Glisholm Sø has evolved into a genuine nature reserve that supports biodiversity and ecological health. The water and surrounding landscape have attracted diverse plant and animal species, transforming what could have been purely functional infrastructure into a thriving habitat. The lake's edges and shallow zones provide breeding grounds for aquatic insects, birds, and amphibians, while the vegetation supports a web of interconnected life. This ecological richness makes the site valuable not only for flood management but as a sanctuary for nature within an urban setting.

Recreation and Community Connection

Glisholm Sø has become a cherished destination for families, walkers, and nature enthusiasts throughout Odense. The lake offers accessible pathways and open spaces where visitors can observe wildlife, enjoy peaceful moments by the water, or engage in outdoor activities. Children and adults alike discover the rhythms of nature here—watching birds, spotting fish, and experiencing seasonal changes. The site demonstrates how infrastructure designed for climate resilience can simultaneously enhance quality of life and create meaningful public spaces. The combination of water, vegetation, and open sky creates a contemplative atmosphere that contrasts with the urban surroundings.

Sustainable Urban Planning in Practice

Glisholm Sø exemplifies contemporary approaches to sustainable city development, where environmental challenges are met with solutions that generate multiple benefits. Rather than hidden pipes and underground systems, this visible, accessible lake makes climate adaptation tangible and integrated into daily urban life. The project was developed by Odense Municipality and VandCenter Syd, with engineering support from COWI and construction by Arkil, representing collaboration between public institutions and technical expertise. The success of Glisholm Sø has positioned it as a model for other Danish cities facing similar climate pressures, demonstrating that functional necessity and recreational value can coexist harmoniously.