MODFLOW2000 model and ZONEBUDGET computer program used to simulate the Upper Big Sandy Designated Groundwater Basin alluvial aquifer, Elbert, El Paso, and Lincoln Counties, Colorado, 2016
The previously developed three-dimensional groundwater flow model (MODFLOW2000) of the Denver Basin 
bedrock aquifer system and overlying alluvial aquifer (https://pubs.er.usgs.gov/publication/pp1770 and 
model archive https://doi.org/10.5066/F77W69PQ) was updated to provide quantitative estimates of 
groundwater flow …