Spatial interpolation of stochastic weather model parameters

Article Abstract:

A method efficiently provides the spatial representation of the parameters of stochastic weather models, such as a rainfall model. A quadratic polynomial spline is used to represent the seasonal variation of the parameters of a point rainfall model, the Rectangular Pulses Poisson model. Thin plate smoothing splines interpolate spatially the coefficients of this representation as functions of position and elevation. This method is superior to the conventional methods of spatial interpolation as it does away with the need for a preliminary estimation of the semi-variogram.

Research, Models, Usage, Stochastic analysis, Interpolation, Weather, Observations, Spline theory

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Simulation of atrazine leaching in relation to water-table management using the CERES model

Article Abstract:

The Crop Estimation through Resource and Environmental Synthesis (CERES) model was modified and used to assist decision making for water-table management with respect to atrazine leaching. CERES is a comprehensive soil-crop-atmosphere simulation model that considers fundamental plant and soil processes and requires minimal data input. The model was calibrated using data obtained from five lysimeters cultivated with maize and sprayed with atrazine. The results revealed that flooding will have a major effect on the crops when done during the early part of the season.

Software, Leaching, Agricultural estimates, Agricultural estimating and reporting

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Simulation and areal interpolation by different methods of atrazine transport

Article Abstract:

The outputs of simulated atrazine behavior under field soil conditions were utilized to realize specific thematic maps for the purpose of assessing the ability of local and global interpolation methods to predict potential hydrological vulnerability of a field. Alluvial soils from a reclaimed agricultural area in northern Italy were examined. Atrazine concentration and computer outputs of maximum penetration depth were taken as sample and isolinear and choropleth maps constructed.

Soil conservation

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