[Transport of biomass in streams 1993: Nitrogen and phosphorus [with separate supplement of tables]]

aquatic environment azote bassin versant cours d'eau cursos de agua danemark denmark dinamarca eau de ruissellement environmental protection escorrentia fiordo fiords fjord fosforo milieu aquatique monitoring nitrogen phosphore phosphorus pollution de l'eau protection de l'environnement rivers runoff transport transporte vigilancia water pollution watersheds