Estimations of present and future loads and concentrations of nitrogen and phosphorus in watercourses in the Agder water region

Summary

Classification according to the Norwegian water regulations requires adequate data for aquatic biology and water chemistry. In the case of moderate or bad ecological status there will also be a question of the distribution between local and long-range transported N and P sources and of the distribution among the local sources. Measured and/or modelled data are crucial for cost-efficiency calculations and decisions on necessary measures to improve the ecological status...