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United States Department of Agriculture

Agricultural Research Service

Title: Using GIS and Geostatistics to Model Nonequilibrium Flow at a Farm Scale

item Rogowski, Andrew

Submitted to: Physical Nonequilibrium in Soils
Publication Type: Book / Chapter
Publication Acceptance Date: April 7, 1997
Publication Date: N/A

Interpretive Summary: Not required.

Technical Abstract: The chapter briefly describes and illustrates a possible approach to managing nonequilibrium water movement and pollutant transport on a farm when the only available information is what can be obtained from a standard soil survey database and an on-site inspection. Generation of equiprobable scenarios, based on realistic conditioning information, provides a series of stochastic images reflecting field conditions. Differences among image can then be used to describe a degree of uncertainty associated with a given location or value of an attribute. As a consequence, the analysis provides a means of scaling up measured or estimated point values to apply to larger areas or volumes. Since the approach can accommodate different types of information in one analysis, the predictions can be updated as new information becomes available. When used in conjunction with a continuous deterministic model, capable of daily time steps, the sequential indicator simulation approach can provide a probabilistic documentation of changes occurring in time, subject to differences in point measurements which are customary with the environmental data.

Last Modified: 4/20/2015
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