PROPOSED SUPPLEMENTARY MEASURES FOR THE RECOVERY OF LAKE LUGANO
The status of eutrophication of Lake Lugano, after six years from the beginning of waste water treatment, has been evaluated. According to the criteria suggested by the O.E.C.D. Cooperative Programme, water quality objectives based on annual mean total P concentration, average and peak chlorophyll levels and average Secchi depth, have been established to assess the most probable trophic conditions as a result of the P control programme. In particular, water quality of Ponte Tresa, Agno and Lugano basins has been considered. Comparing the 1976 conditions and present conditions, it is clear that eutrophication processes in the Ponte Tresa and Agno basins are intensified. Total P loads are 35 and 15 times, respectively, greater than those acceptable with a mesotrophic condition of lake water. Therefore, some supplementary measures, focussed on treating the symptoms of eutrophication (e.g. internal loading, hypolimnetic anoxies) are suggested to achieve a desirable water quality in acceptable time periods.
Bibliographic Reference: INGEGNERIA AMBIENTALE, VOL. 12 (1983), NO. 6, PP. 235- 240
Record Number: 1989122022900 / Last updated on: 1987-01-01
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