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A Methodology for Predicting Near Surface Soil Moisture

其他書名	Final Report
出版	University of Virginia, Department of Environmental Sciences, 1984
URL	http://books.google.com.hk/books?id=IHeWHAAACAAJ&hl=&source=gbs_api

註釋A comprehensive model of soil-water dynamics, a 'wetting front' model, was developed and tested. The model represents a variety of flow processes including infiltration, redistribution, drainage and evaporation. The accuracy of the model was tested by comparison with results from a finite difference solution of the Richards equation and was found to be a reasonable representation. The model was used to investigate the extent to which observed spatial variability in soil moisture may be due to soil heterogeneity. Results suggest that in excess of 50% of observed variance in soil moisture may be attributable to soil heterogeneity. The relationships among soil hydraulic parameters, the specification of which is necessary for any physically-based model including the wetting-front model, and soil physical characteristics were investigated using multivariate statistical methods. Statistical properties of the parameters in each soil textural class have been tabulated. (Author).