David W. Pollock

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Wayfinding is part of everyday life. This study concentrates o n the development of a conceptual model of human navigation in the U.S. Interstate Highway Network. It proposes three different levels of conceptual understanding that constitute the cognitive map: the Planning Level, the Instructional Level, and the Driver Level. This paper formally defines(More)
Techniques and Methods 6–A41 Cover. The cover image shows the local, intermediate, and regional-scale flow systems that develop in response to sinusoidal variations in water-table elevation about an average linear regional gradient. A regional groundwater divide exists at the right boundary and the regional discharge area is in the upper left corner of the(More)
The recent release of MODFLOW-USG, which allows model grids to have irregular, unstructured connections, requires a modification of the particle-tracking algorithm used by MODPATH. This paper describes a modification of the semi-analytical particle-tracking algorithm used by MODPATH that allows it to be extended to rectangular-based unstructured grids by(More)
Wayfinding is part of everyday life. This study concentrates on the development of a conceptual model of human navigation in the U.S. Interstate Highway Network. It proposes three different levels of conceptual understanding that constitute the cognitive map: the Planning Level, the Instructional Level, and the Driver Level. This paper formally defines(More)
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