Eutrophication vulnerability analysis : A case study

River Cavado water quality variability was studied for eutrophication vulnerability assessment at a new surface water supply intake. Since the river flow regime is artificially controlled by upstream multipurpose reservoirs, mathematical modelling was applied in evaluating alternative management sce...

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Bibliographic Details
Published in:Water science and technology 1998, Vol.37 (3), p.121-128
Main Authors: VIEIRA, J. M. P, PINHO, J. L. S, DUARTE, A. A. L. S
Format: Article
Language:English
Subjects:
Algae
Animal, plant and microbial ecology
Applied ecology
Applied sciences
Biological and medical sciences
Computer simulation
Continental surface waters
Earth sciences
Earth, ocean, space
Ecotoxicology, biological effects of pollution
Engineering and environment geology. Geothermics
Eutrophication
Exact sciences and technology
Fresh water environment
Fundamental and applied biological sciences. Psychology
Multipurpose reservoirs
Natural water pollution
Nutrient loading
Nutrients
Pollution
Pollution, environment geology
River basins
River flow
Rivers
Surface water
Upstream
Wastewater discharges
Wastewater treatment
Wastewater treatment plants
Water management
Water quality
Water supply
Water temperature
Water treatment and pollution
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Summary:River Cavado water quality variability was studied for eutrophication vulnerability assessment at a new surface water supply intake. Since the river flow regime is artificially controlled by upstream multipurpose reservoirs, mathematical modelling was applied in evaluating alternative management scenarios. Due to the fact that surface water quality at intake location is mainly affected by a wastewater treatment plant effluent discharge 5 km upstream, algae and nutrients concentration simulations have been worked out in order to identify critical situations. Different algal concentration profiles along the river were obtained for local conditions of light energy, water temperature and estimated nutrient loads, showing high probability of eutrophication occurrence for some of the simulated scenarios. The discussion of results of this study appears to be very useful for river basin wide water management policies evaluation.
ISSN:0273-1223
1996-9732
DOI:10.1016/S0273-1223(98)00063-8