[Runoff - changes in groundwater chemical composition on a hillside]

aluminio aluminium boreal forests calcio calcium chemical composition composition chimique eau de ruissellement eau souterraine escorrentia fer flow rate fosforo gasto groundwater hierro iron magnesio magnesium manganese manganeso oxygen permeabilidad permeability phosphore phosphorus potasio potassium runoff silicio silicium silicon sloping land sodio sodium suecia sweden terre en pente terreno en declive