Water Quality and Soil Natural Salinity in the Southern Imera Basin (Sicily, Italy)

摘要: The Southern Imera river crosses one of the most arid part Sicily. geochemical composition water is due to solubilization processes gypsum rocks, which accounts for particularly low quality resources in areas presence evaporitics deposits highest. and hydraulic parameters was monitored with aim reaching a better understanding relationships between litology quality. potential local hydric resource, but seasonal variability salinity does not allow farmers use its water. A monitoring has been carried out selected localities integrating GIS analysis hydrography basin distribution evaporitic formation. During 2003 2005 we performed four surveys chemicophysical (temperature, pH electrical conductivity) main ionic concentrations (Ca2+, Mg2+, K+, Na+, Cl-, SO4 2- ). We also installed multiparameter probe next hydrometrical station Drasi, about 15 km from mouth. Such used determine, continuously simultaneously, temperature, conductivity, pH, dissolved oxygen, redox potenzial, level. allowed confirm results Roda (1971) Favara (2000), who pointed that cause degrade are salt-rich waters some tributaries flowing over rocks halite deposits. have able identify specific contributors degradation river.