Natural stream restoration design in northern Sweden—analysis of bedload sediment transport.

The MorphoRest project focuses on figuring out how to figure out how streams in northern Sweden should look. Almost no appropriate reference sites for stream restoration exist in northern Sweden (nearly all streams in northern Sweden were altered by timber-floating), so channel design needs to be based on the processes that shape stream form—sediment and water flows.

Streams in northern Sweden have two characteristics that complicate a process-based understanding of sediment transport and channel geometry:

(1) Streams are semi-alluvial, meaning that they contain coarse glacial legacy sediment that was not transported and deposited by the stream itself, and

(2) Mainstem lakes buffer sediment and water that flow downstream

In this project, I will determine rates of and controls on bedload sediment transport in northern Swedish streams based on upstream lakes, glacial legacy sediment, and local valley and catchment characteristics. Once we understand natural geomorphic processes, I can provide restoration practitioners with tools to design a sustainable and natural form for these streams.

The MorphoRest project is led by Lina Polvi at the Department of Ecology and Environmental Science at Umeå University and is funded by an R&D project grant for young research leaders from the Swedish research council Formas.

Questions, comments, suggestions? Please contact:
Lina Polvi Sjöberg: lina.polvi (at)