The restoration of the river Skjern was carried out from 1999 to 2002. It transformed 19 kilometers of channelized river into 26 kilometers of meandering river. The river valley changed rapidly from agricultural fields into meadows, with weeds typical of arable land displaced by natural wetland plants. Birds returned, along with otter, and the number of salmon coming to the Skjern River to spawn grew tenfold [PANL].
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[PANL] Pedersen, M. L., Andersen, J. M., Nielsen, K., & Linnemann, M. (2007). Restoration of Skjern River and its valley: project description and general ecological changes in the project area. Ecological Engineering 30(2), 131-144.