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Title: Turbidity and plant growth in large slow-flowing lowland rivers. Progress Report: October 1989- March 1990
Author: A.F.H. Marker
Document Type: Monograph
Abstract:
The River Great Ouse is a highly managed large lowland river in eastern England. It drains rich arable land in the Midlands and Eastern England and over the years nutrient concentrations have increased and there is a general perception that the clarity of the water has decreased. The main river channels have been dredged a number of times partly for flood control reasons but also for recreational boating and navigation activities. The purpose of the contract is to investigate the seasonal variations and causes of turbidity and their effects on aquatic plants and the associated periphytic organisms. Particular attention is being paid to the distribution of macrophytes and the seasonal variation of periphytic organisms in relation to channel size and structure. This third progress report covers the completion of sampling during the 1989 season and the commencement of sampling for the 1990 season. Estimates of river turbidity, suspended solids and phytoplankton have continued throughout the autumn and winter at ten sites. Estimates of river turbidity, suspended solids and phytoplankton have continued throughout the autumn and winter at ten sites. Notable differences were observed in 1989 between high summer chlorophyll a concentrations in a marina and relatively low chlorophyll concentrations in the adjoining river. Three marinas have therefore been included in the 1990 programme.
Publisher: Institute of Freshwater Ecology
Publication Date: 1990
Publication Place: Huntingdon
Subject Keywords: TurbidityWater qualitySamplingSuspended solidsPhytoplanktonChlorophyll aTransparency (optical)Seasonal variationsMacrophytes
Geographic Keywords: Great OuseEngland
Extent: 7; + 4 figures
Permalink: http://www.environmentdata.org/archive/fbalc:67
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