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Titolo:
Control of algal blooms in reservoirs with a curtain: a numerical analysis
Autore:
Asaeda, T; Pham, HS; Priyantha, DGN; Manatunge, J; Hocking, GC;
Indirizzi:
Saitama Univ, Dept Environm Sci & Human Engn, Urawa, Saitama 3388570, Japan Saitama Univ Urawa Saitama Japan 3388570 n, Urawa, Saitama 3388570, Japan Saitama Univ, Fac Engn, Hydrosci & Geotechnol Lab, Urawa, Saitama 3388570,Japan Saitama Univ Urawa Saitama Japan 3388570 ab, Urawa, Saitama 3388570,Japan Univ Moratuwa, Dept Civil Engn, Katubedda, Moratuwa, Sri Lanka Univ Moratuwa Katubedda Moratuwa Sri Lanka atubedda, Moratuwa, Sri Lanka Murdoch Univ, Dept Math & Stat, Murdoch, WA 6150, Australia Murdoch Univ Murdoch WA Australia 6150 Stat, Murdoch, WA 6150, Australia
Titolo Testata:
ECOLOGICAL ENGINEERING
fascicolo: 3, volume: 16, anno: 2001,
pagine: 395 - 404
SICI:
0925-8574(200101)16:3<395:COABIR>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
WATER-QUALITY; MODEL; PREDICTION; LAKES;
Keywords:
algal bloom; curtain; entrainment; epilimnion; eutrophication; reservoir; Riverine zone;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Asaeda, T Saitama Univ, Dept Environm Sci & Human Engn, 255 Shimo Okubo, Urawa, Saitama 3388570, Japan Saitama Univ 255 Shimo Okubo Urawa Saitama Japan 3388570 , Japan
Citazione:
T. Asaeda et al., "Control of algal blooms in reservoirs with a curtain: a numerical analysis", ECOL ENG, 16(3), 2001, pp. 395-404

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 tokeep the downstream epilimnion away from the nutrient supply. This method markedly reduced algal blooming in the reservoir downstream of the curtainsduring 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 maintainedin 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. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 01:14:09