DS-777 Spatial Location of the Active and Inactive areas of the Model Boundary for the Northern High Plains Groundwater-Flow Model in Parts of Colorado, Kansas, Nebraska, South Dakota, and Wyoming
Description
This data set defines the boundary of the northern High Plains aquifer. It is one of
many developed in support of The High Plains Groundwater Availability Project
and the U.S. Geological Survey Data Series Report: Geodatabase Compilation
of Hydrogeologic, Remote Sensing, and Water-Budget-Component data for the
High Plains aquifer, 2011 (DS 777).
The creation of the model grid is an important first step in developing a
groundwater-flow model, because all model inputs including hydraulic
properties, wells, and boundary conditions are assigned to the model
cells. The northern High Plains groundwater-flow model boundary feature
dataset contains three feature classes; the model grid cells for the northern
High Plains groundwater-flow model in both polygon (cell) and point (centroid)
format and the external boundary of the model. The model grid contains 449,175
cells, 565 rows and 795 columns. Each cell is 1,000 feet per side. The model
grid is not rotated. The external boundary includes the active and inactive areas
of the model.