Abstract
An efficient and integrated approach for the study of overland transport of nitrate during runoff can be achieved by coupling water quality automatic monitoring and distributed parameter modeling. A semi-distributed model, essentially based upon a spatial discretization of the territory into square cells and upon a schematization of the main hydrological processes of erosion, transformation and transport of the chemical substances, was set up. It performs the lumped analysis of overland transport of nitrate (for the elementary cell of spatial discretization or experimental plot scale) and the distributed analysis with routing to the outlet of the watershed. In the present work the mathematical algorithms and the validation of the model are presented.
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