Water quality and pollution - Applied Geography: Principles and Practice - page 169

UNEP/WHO (1988) Assessment of Freshwater Quality.
London.
Varheyli, G. (1985) Continental and global sulphur
budgets 1: anthropogenic SO2 emissions. Atmos.
Environ. 19(7), 1029-40.
Vollenweider, R.A. (1968) Scientific fundamentals of the
eutrophication of lakes and flowing waters, with
particular reference to nitrogen and phosphorus as
factors in eutrophication. Tech. Rep. DAS/CSI/68.27,
Environmental Directorate, OECD. Paris.
Walling, D.E. (1980) Water in the catchment ecosystem. In
A.M.Gower (ed.) Water Quality in Catchment Ecosystems,
Chichester, UK: JohnWiley & Sons, 1-47.
Walling, D.E. (1988) Erosion and sediment yield
research—some recent perspectives. Journal of Hydrology
100, 113-41.
Walling, D.E. (1995) Suspended sediment yields in a
changing environment. In A.M.Gurnell and G.E. Petts
(eds) Changing River Channels, Chichester, UK: John
Wiley & Sons, 149-76.
Walling, D.E., Quine, T.A. and Rowan, J.S. (1992) Fluvial
transport and redistribution of Chernobyl fallout
radionuclides. Hydrobiologia 235/236, 231-46.
Walling, D.E. and Webb, B.W. (1986) Solutes in river
systems. In S.T.Trudgill (ed.) Solute Processes, Chichester,
UK: JohnWiley & Sons, 251-329.

Webb, B.W. (1997) Trends in stream and river temperatures.
In N.E.Peters, O.P.Bricker and M.M.Kennedy (eds)
Water Quality Trends and Geochemical Mass Balance,
Chichester, UK: JohnWiley & Sons, 81-102.
WHO (1984) Guidelines for Drinking-Water Quality. Vol. 1
Recommendations . Geneva:World Health Organisation.
Withers, P.J.A. (1994) The significance of agriculture as a
source of phosphorus pollution to inland and coastal
waters in the UK. unpublished report to MAFF,
London.
Wright, R.F. (1977) Historical Changes in the pH of 128
Lakes in Southern Norway and 130 Lakes in Southern
Sweden over the Years 1923-1976. Oslo: SNSF Project
TN34/77.
Xanthopolous, C. and Hahn, H.H. (1993)
Anthropogenic wash-off from street surfaces. In J.
Marsalek and H.C.Torno (eds) Proceedings VIth Int.
Conf. Urban Storm Drainage, Niagara Falls, Ontario,
Canada, British Columbia: Seapoint Publishing,
417-22.
Zobrist, J. and Stumm, W. (1981) Chemical dynamics of
the Rhine catchment area in Switzerland,
extrapolation to the 'pristine' Rhine river input to
the ocean. In River Inputs to Ocean Systems, UNEP/
UNESCO/IOC/SCOR NewYork: United Nations,
52-63.