EcoHeight: Restoration potential in regulated rivers through fall height analyzes - a method for prioritizing where environmental measures without production impact can best be located

The project aims to provide an analyses tool to determine where in river networks conditions are most suitable for restoring lotic habitat with the purpose to increase the ecological function.

The study aims to provide scientific evidence that head is crucial for the abundance of grayling, trout and freshwater pearl mussel.

The project will map remaining fall height in 15 catchments and compare remaining fall heights with unregulated conditions and unregulated rivers.

Scientific evidence is provided with analysis of reaches with and without head, is compared with the corresponding unregulated reaches regarding environmental conditions. Through eDNA the project will determine the presence of fish and inventory the occurrence of grayling spawning.

The work results in a tool for detecting and prioritizing restoration measures without significant loss of electricity production and a Grayling habitat score.