Abstract «Lake derived drinkable waters: results of a multidisciplinary study. 2) Thermal stratification and throphic state of the reservoir». Thermal stratification, which usually occurs in deep lakes, causes significant variations in water quality. It is important to carefully study such an event, especially when lakes are used as a drinking water resource. Eutrophization is undoubtedly the most common and worrisome phenomenon occurring in lake waters. When it happens, the costs of potabilization procedures increase while the treated water quality decreases. In the lake studied here, thermal stratification occurred for scvcral months per year, determining an elevated hypoxia within the hypolimnic stratus. The trophic state of the lake, determined following the OECD rncthod using chemical pararneters and algal indicaìors, resulted oligo-rncsotrophic. Ali parameters, but ammonia, resulted within the valucs indicated by the ltalian law DPR 515/82 for the category A. Although, at the mornent, the quality of the water appcars saiisfactory, a careful administration of the lake and 01' the surroundin territory is strongly required Ior the maintenance of the environmental equilibrium and, the quality of the lake water.
ACQUE LACUSTRI DESTINATE ALL' APPROVVIGIONAMENTO IDRICO. RISULTATI DI UNO STUDIO INTERDISCIPLINARE
COCCHIONI, Mario;NACCIARRITI, Luisella;PETRELLI, Fabio;
1999-01-01
Abstract
Abstract «Lake derived drinkable waters: results of a multidisciplinary study. 2) Thermal stratification and throphic state of the reservoir». Thermal stratification, which usually occurs in deep lakes, causes significant variations in water quality. It is important to carefully study such an event, especially when lakes are used as a drinking water resource. Eutrophization is undoubtedly the most common and worrisome phenomenon occurring in lake waters. When it happens, the costs of potabilization procedures increase while the treated water quality decreases. In the lake studied here, thermal stratification occurred for scvcral months per year, determining an elevated hypoxia within the hypolimnic stratus. The trophic state of the lake, determined following the OECD rncthod using chemical pararneters and algal indicaìors, resulted oligo-rncsotrophic. Ali parameters, but ammonia, resulted within the valucs indicated by the ltalian law DPR 515/82 for the category A. Although, at the mornent, the quality of the water appcars saiisfactory, a careful administration of the lake and 01' the surroundin territory is strongly required Ior the maintenance of the environmental equilibrium and, the quality of the lake water.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
