Show simple item record Medina, Cristian R. Olyphant, Greg A. Letsinger, Sally L. 2006-11-20T21:44:24Z 2006-11-20T21:44:24Z 2006-11-20T21:44:24Z
dc.description This poster was presented at the 2006 Annual Meeting of the Geological Society of America, October 22-25, 2006, Philadelphia, Pa. en
dc.description.abstract The goal of this research is to develop a model that describes the saturated and unsaturated groundwater flow in Berrien County, Michigan (1,350 km2), an area containing a complex sequence of glacio-lacustrine deposits. Stone and others (2001) mapped the morphosequences in Berrien County at a scale of 1:24,000, which includes georeferenced structure contours for 20 individual units. We have developed a methodology to translate this detailed morphostratigraphy into a solid three-dimensional geologic model, and then into a three-dimensional block of data that can be used as input to a finite-difference groundwater-flow model. Letsinger and others (2006) describe the process of using geographic information system software to convert the structure contours into georeferenced raster layers that describe each unit. At this stage of the reconstruction, only the bounding surfaces between the units are defined. In order to stack the units in vertical space using customized computer code, a “virtual well field” (regularized two-dimensional array of points) samples each x-y location in each of the 20 rasterized data layers. Units that are intersected from the top bounding surface (surface topography) to the bottom bounding surface (bedrock surface) are then identified. The result of this step is a vector (one-dimensional array) at each virtual well location that describes the elevation of each morphostratigraphic unit boundary intersected at that location. However, at this stage, the model is essentially a regularized three-dimensional point cloud, and three-dimensional information visualization software (3DIVS) is then utilized to generate a solid geologic model by interpolating the vertical geologic “samples” throughout the model domain. A finite-difference grid (“brickpile”) at the chosen resolution of the groundwater-flow model is then generated from the solid geologic model using data-processing functions of the 3DIVS. en
dc.format.extent 4285986 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.relation.isversionof LETSINGER, Sally L., OLYPHANT, Greg A., and MEDINA, Cristian R., 2006, Dressing the Emperor: The Role of Three-Dimensional Information Visualization Software in the Development of Three-Dimensional Hydrologic Models. Geological Society of America Abstracts with Programs, Vol. 38, No. 7, p. 164. en
dc.rights This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. To view a copy of this license, visit or send a letter to Creative Commons, 543 Howard Street, 5th Floor, San Francisco, California, 94105, USA. en
dc.rights.uri en
dc.subject Berrien County, Michigan en
dc.subject Central Great Lakes Geologic Mapping Coalition en
dc.subject Geologic Information System en
dc.subject GIS en
dc.subject Geographic Information Systems en
dc.subject Ground-Water Modeling en
dc.subject Three-Dimensional Geologic Model en
dc.subject Information Visualization en
dc.subject Morphosequence en
dc.subject Hydrogeology en
dc.subject Hydrology en
dc.title Dressing the Emperor: The Role of Three-Dimensional Information Visualization Software in the Development of Three-Dimensional Hydrogeologic Models en
dc.type Presentation en

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