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Natural fertilisation of the marine environment: modelling of the Glomma flood 1995
Skogen, M.D.; Aure, J.; Danielssen, D.; Svendsen, E. (1998). Natural fertilisation of the marine environment: modelling of the Glomma flood 1995. Sarsia 83: 361-372
In: Sarsia. University of Bergen. Universitetsforlaget: Bergen. ISSN 0036-4827, more
Peer reviewed article  

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  • Skogen, M.D.
  • Aure, J.
  • Danielssen, D.
  • Svendsen, E.

    The flood in the Norwegian river Glomma in May-June 1995 was among the largest ones during this century. Besides being devastating for man and buildings, it implied an extra supply of nutrients to the Skagerrak. This paper will focus on the possible effects this natural fertilisation could have had on the primary production in the receiving water. The NORWegian ECOlogical Model system (NORWECOM) has been used to quantify this effect. The model has been run three times with different runoff scenarios to isolate the effects of the flood. To investigate the dispersion and dilution of the water from Glomma, this water has been labelled in the model. The model results have also been compared with a set of field data obtained during the period. During the flood the model gives a significant change in primary production over large areas of the Skagerrak, and all extra nutrients added from the flooded rivers were consumed by the algae. However, the flood seems to have only a small impact on the annual production.

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