Abstract
This paper addresses the diffuse [non-point source (NPS)] contamination problem by integrating the environmental impact analysis in production practices with the economics of spatial management methods. It employs a combination of geostatistical simulation and unsaturated zone transport modeling to evaluate the effect of spatial variability of soil-related parameters on NPS ground water contamination. Five management scenarios of spatially variable nutrient application are developed and evaluated on the basis of their impact on production agriculture and possible environmental pollution. The scenarios are evaluated considering the spatial variability of residual soil nitrate, yield, and hydraulic conductivity in the field. The process is applied to three realistic cases, differing in the extent of spatial variability, ranging from low to high variability. The modeling results indicate that the identified framework holds promise for evaluating spatial management practices in terms of production as well as ...
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