Estimation of nitrogen and phosphorus losses to surface water and groundwater through the implementation of the SWAT model for Norwegian soils

摘要: Scope and Background It is acknowledged that diffuse sources cause the most important nitrogen (N) phosphorus (P) losses to river system substantially enrich groundwater in nitrates. These arise primary from agricultural activities mainly fertilizer applications, they are determined by soil attributes. In cold climates, winter conditions freezing of soils may influence infiltration capacity thereby can have a serious effect on partitioning excess precipitation subsequently nutrient transportation. The purpose this article investigate behaviour six widespread different textured types, (N, P) under climate conditions. investigation was conducted Norwegian Vansjo-Hobolv catchment through application physical model named Soil Water Assessment Tool (SWAT), taking into consideration additional aspect during winter, which distinguishes Scandinavian other European soils.