There is considered methodology of estimation of contaminants
and biogenic elements intake into water objects from urban watersheds by
municipal non-point runoff. We used the Volkovka River in St. Petersburg
and its watershed for the research because the watershed is characterized
by high degree of variety and includes all possible types of urban areas:
multi-storey residential constructions, industrial areas, green spaces,
cemeteries, wastelands, and even agricultural areas. The research included
the monitoring data processing, the watershed analysis by GIS technologies,
and field studies.