Water quality impact from shrimp farming effluents in a tropical estuary

Shrimp farms cause environmental impacts in coastal ecosystems, compromising water quality by discharging effluents rich in nutrients and organic matter. The impacts of shrimp farming are often investigated by the unit effect of a farm. In this study, a harvest time series generator is used to analy...

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Bibliographic Details
Published in:Water science and technology 2021-01, Vol.83 (1), p.123-136
Main Authors: Bull, E G, Cunha, C de L da N, Scudelari, A C
Format: Article
Language:English
Subjects:
Agriculture
Animals
Anthropogenic factors
Aquaculture
Coastal ecosystems
Coastal waters
Coastal zone
Coasts
Discharge
Ecosystem
Ecosystems
Effluents
Environmental impact
Environmental Monitoring
Estuaries
Estuarine dynamics
Farms
Harvest
Harvesting
Human influences
Hydrodynamics
Impact analysis
Marine crustaceans
Mineral nutrients
Neap tides
Nutrient concentrations
Nutrients
Organic matter
Pollutants
Pollution dispersion
Pollution sources
Ponds
Probability distribution
Random variables
Salinity
Seasons
Shellfish farming
Shrimp culture
Synergistic effect
Time series
Tropical climate
Waste management
Water circulation
Water pollution
Water Quality
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Summary:Shrimp farms cause environmental impacts in coastal ecosystems, compromising water quality by discharging effluents rich in nutrients and organic matter. The impacts of shrimp farming are often investigated by the unit effect of a farm. In this study, a harvest time series generator is used to analyze the impact of the synergistic effect of several shrimp farm harvests in a tropical estuary. Two other scenarios with harvests concentrated during spring and neap tides were also analyzed, showing waste management techniques that can reduce the impact of shrimp aquaculture on coastal areas. A hydrodynamic circulation and water quality model were implemented to evaluate the dispersion of pollutants using different discharge combinations. The harvesting scenarios were compared to a scenario without the activity. Results indicate that shrimp farming is not the main anthropogenic source of pollution in the estuary studied. There were no significant differences in the average and maximum variations in nutrient and organic matter concentrations between the different management techniques.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2020.559