A METHODOLOGICAL PROPOSAL FOR THE MONITORING OF ATMOSPHERIC DEPOSITIONS AND EVALUATION OF CRITICAL LOADS EXCEEDANCES

Data concerning one year's monitoring of wet and dry atmospheric depos itions in a station located in Northern Italy (city of Bologna) are re ferred. Contents of acidity and sulphur are determined and compared wi th the ''critical loads'' of acidity allowing an assessment of the env ironmental quality of the territory. In order to evaluate the total po lluting fluxes, two different collecting systems have been employed: a traditional ''wet & dry'' sampler and an innovative dry deposition sa mpler (DAS, Dry deposition on Aqueous Surface). The present paper repr esents a preliminary approach to the determination of total polluting fluxes and their comparison with critical loads in connection with the territory examined in UNECE maps.