Management of Biesboch reservoirs for quality control with special reference to eutrophication

Oskam, G. and van Breemen, L. (1992) Management of Biesboch reservoirs for quality control with special reference to eutrophication. In: Sutcliffe, D.W. and Jones, J.G. (eds.) Eutrophication: research and application to water supply. Ambleside, UK, Freshwater Biological Association, pp. 197-213. (FBA Special Publications,3)

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The three Biesbosch Reservoirs are pumped storage reservoirs, fed with rather polluted and highly eutrophic water from the River Meuse. Air injection at the bottom of the reservoirs prevents thermal stratification, which would otherwise result in serious water quality deterioration. Reservoir mixing also serves as an economic algal control measure; mixing over sufficient depth causes light to play the role of limiting factor and this, combined with zooplankton grazing, keeps the biomass of phytoplankton at acceptable levels. Special problems are caused by benthic, geosmin-producing Oscillatoria species growing on the inner embankment. Rooting up the bottom with a harrow is used as the method of control, based on underwater observations by biological staff trained as SCUBA-divers. With regard to pollutant behaviour the three reservoirs act as a series of fully mixed reactors. This enables the application of kinetic models to describe their behaviour and allows the use of a selective intake policy, e.g. for suspended solids with associated contaminants, ammonia and polynuclear aromatic hydrocarbons. A combination of selective intake and self- purification processes - enhanced by the compartmentalisation of the storage volume in three reservoirs - leads to a striking improvement for many water-quality parameters.

Item Type: Book Section
Title: Management of Biesboch reservoirs for quality control with special reference to eutrophication
Personal Creator/Author:
Oskam, G.
van Breemen, L.
Title of Book: Eutrophication: research and application to water supply
Sutcliffe, D.W.
Jones, J.G.
Refereed: No
Series Name: FBA Special Publications
Number: 3
Page Range: pp. 197-213
Date: 1992
Publisher: Freshwater Biological Association
Place of Publication: Ambleside, UK
ISBN: 978-0900386-52-7
Issuing Agency: Freshwater Biological Association
Uncontrolled Keywords: Eutrophication; Algal blooms; Water reservoirs; Water management; Phytoplankton; Pollution control; Water supply; Netherlands
Subjects: Limnology
Item ID: 5297
Depositing User: Hardy B Schwamm
Date Deposited: 10 May 2011 13:12
Last Modified: 29 Sep 2011 15:07
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