Change search
ReferencesLink to record
Permanent link

Direct link
Contrasting Landscape Influences on Sediment Supply and Stream Restoration Priorities in Northern Fennoscandia (Sweden and Finland) and Coastal British Columbia
Show others and affiliations
2011 (English)In: Environmental Management, ISSN 0364-152X, E-ISSN 1432-1009, Vol. 47, no 1, 28-39 p.Article in journal (Refereed) Published
Abstract [en]

Sediment size and supply exert a dominant control on channel structure. We review the role of sediment supply in channel structure, and how regional differences in sediment supply and landuse affect stream restoration priorities. We show how stream restoration goals are best understood within a common fluvial geomorphology framework defined by sediment supply, storage, and transport. Landuse impacts in geologically young landscapes with high sediment yields (e.g., coastal British Columbia) typically result in loss of instream wood and accelerated sediment inputs from bank erosion, logging roads, hillslopes and gullies. In contrast, northern Sweden and Finland are landscapes with naturally low sediment yields caused by low relief, resistant bedrock, and abundant mainstem lakes that act as sediment traps. Landuse impacts involved extensive channel narrowing, removal of obstructions, and bank armouring with boulders to facilitate timber floating, thereby reducing sediment supply from bank erosion while increasing export through higher channel velocities. These contrasting landuse impacts have pushed stream channels in opposite directions (aggradation versus degradation) within a phase-space defined by sediment transport and supply. Restoration in coastal British Columbia has focused on reducing sediment supply (through bank and hillslope stabilization) and restoring wood inputs. In contrast, restoration in northern Fennoscandia (Sweden and Finland) has focused on channel widening and removal of bank-armouring boulders to increase sediment supply and retention. These contrasting restoration priorities illustrate the consequences of divergent regional landuse impacts on sediment supply, and the utility of planning restoration activities within a mechanistic sediment supply-transport framework.

Place, publisher, year, edition, pages
2011. Vol. 47, no 1, 28-39 p.
Keyword [en]
aggradation, channel structure, coastal, british Columbia, degradation, Finland, fish habitat, large wood, sediment supply, stream restoration, Sweden
National Category
Natural Sciences
URN: urn:nbn:se:umu:diva-38927DOI: 10.1007/s00267-010-9585-0ISI: 000286639600003PubMedID: 21132293OAI: diva2:385085
Available from: 2011-01-11 Created: 2011-01-11 Last updated: 2016-05-18Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Nilsson, Christer
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Environmental Management
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 59 hits
ReferencesLink to record
Permanent link

Direct link