Hypolimnetic Aeration in Three Swiss Lakesby Roger P. Favre, Locher & Cie Inc, Zuerich, Switzerland,
Abstract: Eutrophication is quite common in low altitude Swiss lakes. Government agencies have set up phosphorus and oxygen limits for streams and lakes. Aeration equipment has been in use for up to 9 years in three Swiss lakes iwth the goal of maintaining a 4 mg/l oxygen level and preventing phosphorus release. In the course of the project, nitrogen transfer and sediment surface modification have been studied.
Subject Headings: Lakes | Aeration | Eutrophication | Phosphorus | Nitrogen | Sediment
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