Digital Polygon Model Grid of the Hydrogeologic Framework of Bedrock Units for a Simulation of Groundwater Flow for the Lake Michigan Basin
The hydrogeologic framework for the Lake Michigan Basin model was developed by grouping 
the bedrock geology of the study area into hydrogeologic units on the basis of the functioning 
of each unit as an aquifer or confining layer within the basin. Available data were evaluated 
based on the areal extent of coverage …