]> 2026-04-12T13:41:48+00:00 Case study:Environmental design Mandalsvassdraget 500 en NJFF nr2 2016 web Forseth En suksesshistorie om forksning og tiltak for laks i Mandalselva.pdf Presentation of research on multi-criteria analysis of different habitat improving measures for Mandalselva (CEDREN/EcoManage project), David N. Barton et al. 2015 Article Barton et al. 2020 Multi-criteria decision analysis in Bayesian networks - Diagnosing ecosystem service trade-offs in a hydropower regulated river. Study conducted at Mandalselva Approved Removal of weirs (9 weirs) installation of gravel habitat establishment of shelter in the substrate sediment harrowing (using an excavator); introduction of larger stones in the riverbed stream Agder Energi Norwegian Institute for Nature Research (NINA) Sintef Norce Research Skandinavisk Naturovervåking Agder Energi Yes No Yes false Project area Environmental Design Mandlaselva Barton et al. 2020.jpg No Torbjørn Forseth Norwegian Institute for Nature Research (NINA) Norwegian Institute for Nature Research (NINA) Agder Energi expected soon... 58.2445109,7.514 Aleksander Agder Energi Andersen Future increase of minimum discharge still under evaluation 88 Removal of weirs (9 weirs), installation of gravel habitat, establishment of shelter in the substrate, sediment harrowing (using an excavator); introduction of larger stones in the riverbed, stream,Activation of sidearms, ,Future increase of minimum discharge still under evaluation,Active involvement of local interests groups and land owners, Torbjørn Forseth Norwegian Institute for Nature Research (NINA) Monitoring surveys and results are expected to be published soon. Torbjørn Alexander Forseth Andersen 25156 Norwegian Institute for Nature Research (NINA), Sintef, Norce Research, Skandinavisk Naturovervåking Removal of weirs in the Mandalselva river in connection to efforts to make earlier unproductive zones accessible as spawning and growing areas for salmon. Foto: Agder Energi Alexander Andersen Agder Energi Graving miljodesign mandalselva.jpg 2014-01-10Z 2456667.5 Complete Mandalselva is regulated for hydropower production since 1947 and this has impacted the conditions for Atlantic salmon in this river. The project "Miljødesign Mandalselva" used the concept of Environmental Design as described in the "Handbook for environmental design in regulated salmon river (Forseth and Harby 2013) and was accompanied by thorough research efforts in order to study which measures would be suitable to improve the conditions for salmon and at the same time to take into account hydropower production. This researcj was led by the Norwegian Institute for Nature Research (NINA) and conducted in cooperation with SINTEF Energy, Norce Research and Skandinavisk Naturovervåking. It included i.a. a trade-off analysis between the production of Atlantic salmon and the production of hydropower by examining the use of several physical mitigation measures and changes in release of water. Local stakeholders and public natural resource management were involved by means of a counceling group. As a result, nine weirs in the river were removed and further habitat improving measures were put in place (e.g. installation of gravel habitat). Environmental design Mandalsvassdraget environmental design mandalsvassdraget Yes Activation of sidearms Active involvement of local interests groups and land owners Atlantic salmon (Salmo salar) Alexander Andersen Agder Energi Fisheries Hydropower Hydromorphology 394 100 - 500 k€ 022-649-R Mandalselva Alexander Andersen Agder Energi 2019-12-06T14:26:56Z 2458824.102037 2020-09-09T14:31:12Z 2459102.105 Environmental design Mandalsvassdraget