Titlebook: Restoration and Recovery of Shallow Eutrophic Lake Ecosystems in The Netherlands; Proceedings of a con Louis Liere,Ramesh D. Gulati Confere

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The significance of the Loosdrecht lakes research project for eutrophication policy in The Netherlanesults reaffirm the main lines of national eutrophication policy drawn up in 1979 (Policy Document on Phosphates) and further developed in the eighties. Interesting new insights have been gained, for example into the role of sediment and seston as well as into the relative importance of trophic leve

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Water quality research in Loosdrecht lakes: the salient featuresmme, involving several research institutes and laboratories in The Netherlands, was initiated in 1983, i.e. a year before the reduction of external phosphorus loading by stripping, became effective. The paper summarizes the main results, with emphasis on insight they provide into the lake ecosystems

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Fixation of phosphorus in lake sediments using iron(III)chloride: experiences, expectations The accepted method to combat internal loading is careful dredging of the upper sediment layers (Cooke .., 1986), but this method is costly and time consuming. Addition of phosphorus binding agents to the sediments might offer an alternative. In the Netherlands the use of aluminum compounds, the mo

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Water quality research in the Loosdrecht lakes: proposals for the follow-up restoration measureshosphorus loading from 0.35 to 0.1 g Pm. y.. Mathematical modelling suggested that such a reduction would benefit the water quality of the lakes. The results of the WQL investigation did not lead to additional measures (dredging, biomanipulation, chemomanipulation).

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Dynamics of phytoplankton detritus in a shallow, eutrophic lake (Lake Loosdrecht, The Netherlands)bation in the dark. The decomposition rate of this fraction was 0.005 d.. On a basis of a steady-state model of the dynamics of phytoplankton detritus, the areal organic dry weight concentration of the detritus in the lake is .. 60 g m.. This means the quantities of detritus in the seston and epipelon are about equal.