Author(s)

F. Preti

Abstract

The preliminary validation of a new methodology for the analysis of the contamination caused by the use of chemical substances in agriculture is presented. This methodology is based on distributed models that allow us to consider, at basin scale, geomorphological, pedological, meteorological, climatic, antropic characteristics and the main transport and transformation dynamics of chemical substances. Some studies about nonpoint pollution processes and distributed soil vulnerability have been already realized in some italian basins. The model validation has been obtained through the measured Atrazine herbicide losses from a small Georgia watershed. Besides a correct hydrological and sedimentological model balance, also the dissolve

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