Schematic structure of a river catchment with complex land use (green = natural areas; yellow = agricultural areas; grey = urban or peri-urban areas; blue = water body; CSO, TANK = sewer overflow structure; WWTP = waste water treatment plant; arrows: pressures on the receiving water body, dotted = diffuse pressures, solid = point pressures).

Schematic structure of a river catchment with complex land use (green = natural areas; yellow = agricultural areas; grey = urban or peri-urban areas; blue = water body; CSO, TANK = sewer overflow structure; WWTP = waste water treatment plant; arrows: pressures on the receiving water body, dotted = diffuse pressures, solid = point pressures).

Schematic structure of a river catchment with complex land use (green = natural areas; yellow = agricultural areas; grey = urban or peri-urban areas; blue = water body; CSO, TANK = sewer overflow structure; WWTP = waste water treatment plant; arrows: pressures on the receiving water body, dotted = diffuse pressures, solid = point pressures).

Schematic structure of a river catchment with complex land use (green = natural areas; yellow = agricultural areas; grey = urban or peri-urban areas; blue = water body; CSO, TANK = sewer overflow structure; WWTP = waste water treatment plant; arrows: pressures on the receiving water body, dotted = diffuse pressures, solid = point pressures).