Abstract
An expert evaluation system (named ARENAL) has been developed using a knowledge-based approach that allows estimation of the relative vulnerability of soil and groundwater to diffuse agrochemical contamination. ARENAL interprets groundwater vulnerability at the field scale especially from nitrate and pesticide leaching. Soil properties and related agricultural land-features are combined with management system criteria for Mediterranean regions. The Automated Land Evaluation System (ALES) was used to acquire this computer-captured expert knowledge and allied data. The ARENAL expert system uses basic input data or "key" parameters from existing soil and land survey information. Such an evaluation approach can be the basis for estimation of the environmental impact of agricultural activities, with reference to chemical degradation of soil and water resources.
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