BERÄKNING AV KVÄVE- OCH FOSFORTRANSPORT MED HJÄLP AV SATELLITBILD OCH GIS Bornsjöns avrinningsområde / Calculation of Transports of Nitrogen and Phosphorus by Using Satellite Images and GIS Bornsjön Catchment Area
A literature study and a case study have been made to investigate the possibility to use GIS and remote sensing for calculating transportation of phosphorus and nitrogen in a catchment. To classify the land use a Spot image was used together with a map of urban areas. Other parameters such as land use, inclination, soil type, and distance from open watercourse have been used to calculate the transportation rate in the USLE-model (the Universal Soil Loss Equation). The results from these two models have been compared with manual calculations of land use from a map in scale 1: 10,000 and measurements of phosphorus and nitrogen directly in the watercourses.
Författare SONIA ERIKSSON and ÅKE SIVERTUN
Nyckelord satellite images, GIS, Geographical Information System, phosphorus, nitrogen, nutrient transport, USLE, computer modelling