Diffuse pollution that arises as a consequence
of changes in land-use management activities such
as forestry increased acidification, DOC and
sediment production , agriculture nutrient release and urbanisation urban runoff , differs in .
its nature, as well as regards control and pollution
options, from major point source effluent discharges
Novotny and Olem, 1994 . These diffuse Ž .
sources of pollution are a major concern in Scotland,
as highlighted in the SEPA 1996 State of Ž .
the Environment report and SEPA, 1999 .