Abstract
High annual precipitation and steepmountains makeNorway especially suited for the extraction of potential energy fromwaterfalls and is the country with largest production of hydroelectric power in Europe. The power productionmay affect both the position of river outlets and the seasonal cycle of freshwater discharge. To study the impact of river regulation on fjord dynamics and the transport of cod eggs, a numerical model is applied for the year 2009. We investigate two cases; the first case with only the natural seasonal cycle of freshwater discharge, whereas the second case includes all river regulations in the fjord system. The results show stronger surface outflow in the main part of the fjord when applying river regulations compared with natural run-off. The transport of cod eggs out of the fjord system increased with regulated run-off compared with the natural run-off, which correspondingly caused a reduced local retention of eggs within the various fjord branches. Changes in the seasonal cycle of freshwater discharge due to hydroelectric power production cannot be neglected as a contributing factor to the observed decline in coastal and fjord cod subpopulations.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
