Nutrients in and discharges from streams in Aarhus County 1993

aguas residuales algae aquatic environment azote calidad del agua cours d'eau cursos de agua danemark denmark dinamarca eau de ruissellement environmental protection escorrentia fish ponds fosforo leaching lessivage du sol milieu aquatique monitoring nitrogen nutrientes nutrients phosphore phosphorus protection de l'environnement rivers runoff substance nutritive vigilancia wastewater water quality