A lake, whose waters are planned to be used as drinkable water, was studied during a three year period and the results are reported here. The study was performed first on the four tributary streams, using chemi¬cal and biological parameters. Subsequently the Authors investigated the chemical and trophic characteristics of the reservoir, taking into special consideration the termal stratification of the waters. The results evidenced a satisfactory quality level of 3 out of 4 tributary streams and of the waters of the reservoir. Thermal stratification induces, in the lower stratus, a significant hypoxia responsible for the modification of some chemical parameters. The trophic state of the reservoir is actually classifiable as oligo-meso trophic. The validity 01' the specific italian low (DPR 515/82), which indicates the characteristics of surface waters to be used as drinking water resource, is discussed on the basis of the results of the study.
LAKE DERIVED DRINKABLE WATERS: RESULTS OF A MULTIDISCIPLINARY STUDY. 1) METHODOLOGICAL APPROACH, TYPIFICATION OF TRIBUTARY STREAMS AND LAKE WATERS.
COCCHIONI, Mario;GRAPPASONNI, Iolanda;
1999-01-01
Abstract
A lake, whose waters are planned to be used as drinkable water, was studied during a three year period and the results are reported here. The study was performed first on the four tributary streams, using chemi¬cal and biological parameters. Subsequently the Authors investigated the chemical and trophic characteristics of the reservoir, taking into special consideration the termal stratification of the waters. The results evidenced a satisfactory quality level of 3 out of 4 tributary streams and of the waters of the reservoir. Thermal stratification induces, in the lower stratus, a significant hypoxia responsible for the modification of some chemical parameters. The trophic state of the reservoir is actually classifiable as oligo-meso trophic. The validity 01' the specific italian low (DPR 515/82), which indicates the characteristics of surface waters to be used as drinking water resource, is discussed on the basis of the results of the study.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
