A Predictive Model to Optimize the Collection of Data Needed to Characterize Fluvial Sand Bodies
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
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A model was developed which uses geologically based calculations to delineate a sand body, deposited by a meandering stream, into and through a site with fewer boring locations than required by typical grid drilling. This is accomplished by establishing the environment of deposition from stratigraphic information and by assuming the sand body width is the same as the meander belt width. The meander belt width was calculated from sand thickness, once the sand body is encountered. Spacing for additional boring locations is determined from the sand body width and the probability of additional borings intersecting the sand body. Once a sufficient number of borings are available, such as from site boundaries, the sand thickness is estimated for the site by the statistical method of kriging. Kriging gives the errors for the estimates. These errors are used in combination with the spacing determined from the probability of other borings intersecting the sand body to select a new boring location. The additional boring locations are selected in areas with the most error at the determined spacing. Conceptual model, Site characterization, Geology, Geostatictics.
- Geology, Geochemistry and Mineralogy
- Hydrology, Limnology and Potamology
- Soil Mechanics
- Water Pollution and Control