Journal article
Control of algal blooms in reservoirs with a curtain: a numerical analysis
Ecological Engineering, Vol.16(3), pp.395-404
2001
Abstract
Two vertical curtains, having depths to cover the epilimnion thickness, were installed across the Terauchi Dam Reservoir in the western island of Japan to curtail the nutrient supply from nutrient-rich inflows to the downstream epilimnion of the reservoir. The withdrawal level was also regulated to keep the downstream epilimnion away from the nutrient supply. This method markedly reduced algal blooming in the reservoir downstream of the curtains during spring and summer. The physical and biological processes in the reservoir ecosystem were analysed using the 2-D reservoir model DYRESM and chemical and biological submodels, to predict the water quality and algal species composition in the reservoir. The horizontal variability was maintained in the model by dividing the horizontal layer into parcels. Temperature, chlorophyll-a, soluble phosphorus, nitrate, ammonium, dissolved oxygen, biochemical oxygen demand, internal nitrogen, internal phosphorus were considered as state variables in the model. The simulated results revealed the mechanism of how algal blooming is reduced, during early spring high algal concentrations consume large amounts of nutrients, which reduces the nutrient supply to the downstream zone of the reservoir, whereas during late spring and summer, nutrient dispersion from the upstream epilimnion to the downstream epilimnion is curtailed by the curtains, markedly reducing algal blooming in the downstream zone.
Details
- Title
- Control of algal blooms in reservoirs with a curtain: a numerical analysis
- Authors/Creators
- T. Asaeda (Author/Creator)H.S. Pham (Author/Creator)D.G. Nimal Priyantha (Author/Creator)J. Manatunge (Author/Creator)G.C. Hocking (Author/Creator)
- Publication Details
- Ecological Engineering, Vol.16(3), pp.395-404
- Publisher
- Elsevier B.V.
- Identifiers
- 991005540561407891
- Copyright
- © 2001 Elsevier Science B.V.
- Murdoch Affiliation
- School of Chemical and Mathematical Science
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.216 Lake Ecosystems
- Web Of Science research areas
- Ecology
- Engineering, Environmental
- Environmental Sciences
- ESI research areas
- Environment/Ecology