Decaying lakes: the origins and control of cultural eutrophication
A comprehensive introduction to eutrophication, the process by which the water quality of lakes deteriorates as a result of their increased levels of nutrients. (These nutrients, however, also increase the fertility of lakes.) The process normally takes centuries, but is accelerating as a result of man's activities in catchment areas. The book is divided into three parts. The first part looks at basic causes and control strategies; the second considers conflict between the natural environment and man's influence; the third presents the scientific basis of our understanding of both eutrophication and its control.
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Biomass in Aquatic Systems
Nitrogen and Phosphorus
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achieved aeration agricultural algal blooms allochthonous ammonia anaerobic application aquatic bacteria biological biomass carbon Chapter chemical chlorophyll-a crop cultural eutrophication cycle decay denitrification destratification detergents diatom discharge dissolved oxygen dredging ecosystem effects effluent environment environmental epilimnion equation erosion Farmoor Reservoir fertilizer Figure fish growth rate Hartbeespoort Dam harvesting hypolimnetic hypolimnion increase inorganic lake land leaching levels limited macrophyte mesotrophic methods mixing nitrate nitrification nutrient concentration nutrient input nutrient loading nutrient removal OECD oligotrophic organic orthophosphate particulate phosphate phosphorus concentration phosphorus loading photic zone photosynthesis phytoplankton plants pollution polyphosphate population present primary productivity receiving waters reduce release Reproduced by permission reservoirs result runoff Secchi disc sediments sewage significant sludge slurries soil soluble sources species stratification surface Table techniques temperature thermocline treatment trophic levels trophic status turbulence uptake utilised wastes wastewater water body water column water quality zooplankton