Qualla: Kolindsund

Kolindsund: Introduction

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit Old Dane, CC BY-SA 4.0. Stand in the middle of Kolindsund on a dry August afternoon and you are standing on the floor of a lake. The wheat around you grows in mud that spent thousands of years underwater, and the ground beneath your boots sits roughly two and a half metres below the level of the Kattegat, a short drive east. Nothing about the field looks unusual — grain, rapeseed, a straight gravel road, the long low horizon of Djursland. What is unusual is the reason it is dry. Three electric pumping stations run more or less continuously in a valley that would otherwise fill back up.

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Image: Old Dane | CC BY-SA 4.0

Kolindsund: The Island That Djursland Used to Be

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit Tone, CC BY-SA 3.0. Kolindsund is a glacial trench, twenty-five kilometres long, hemmed by slopes rising as much as thirty-five metres above the flat. In the Stone Age it was not a valley at all but a saltwater sound, open at the Grenaa end and cutting clean through the landscape — which meant that ...

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Image: Tone | CC BY-SA 3.0

Kolindsund: Picks, Shovels, Wheelbarrows

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit Slaunger, CC BY-SA 3.0. In March 1872 a joint-stock company was formed in Copenhagen with a single purpose: to remove a lake. Work began that May. Over the next two years, crews cut a canal along the northern edge of the sound and another along the southern edge, intercepting the streams that had always...

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Image: Slaunger | CC BY-SA 3.0

Kolindsund: One Point Three Centimetres a Day

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit Jan Pešula, CC0. The pumps started on 3 May 1874, and the water began to fall at about 1.3 centimetres a day. It is a tiny number and an enormous one. Through that summer the lake retreated towards its deepest channels and then stopped being a lake, leaving roughly 2,800 hectares of black, wet, a...

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Image: Jan Pešula | CC0

Kolindsund: What the Engineers Underestimated

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit Nico-dk, CC BY-SA 3.0. The original calculations assumed the pumps would only have to lift the rain that fell on the sund. Reality asked for roughly twice that. Groundwater from the surrounding hills does not politely stop at a canal; it travels underneath and resurfaces inside the basin, and Djursland...

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Image: Nico-dk | CC BY-SA 3.0

Kolindsund: The Case for Letting It Back In

Sat, 05 Sep 2026 00:00:00 GMT

Photo credit T. Gliemann, Public domain. Since 1999 an association called Kolindsunds Venner — the Friends of Kolindsund — has argued that the sensible thing to do is stop. Re-flood the basin and Denmark gets back something it deleted: a lake that would be the largest in Jutland by area and the second largest in the cou...

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Image: T. Gliemann | Public domain