Richard M. Yager

2 items:

MODFLOW-2005, MODFLOW-NWT, and SEAWAT models used to simulate variable-density groundwater flow and contaminant transport at Naval Base Kitsap, Keyport, Washington The U.S. Geological Survey, in cooperation with the U.S. Department of the Navy, developed several 3-D groundwater flow models for used with MODFLOW-2005, MODFLOW-NWT, and SEAWAT model codes to evaluate variable-density groundwater flow and contaminant transport in Operable Unit 1 on Naval Base Kitsap in Keyport, Washington. Chlorinated volatile organic compounds (CVOCs) have migrated to groundwater beneath a former 9-acre landfill at Operable Unit 1 (OU-1). The three predominant ground-water contaminants are the chloroethene compounds trichloroethene (TCE), cis-1,2-dichloroethene (cis-DCE), and vinyl chloride (VC). A need for remedial action was identified because some of the contaminants present a potential risk... Tags: Groundwater, Groundwater Model, InlandWaters, Keyport, MODFLOW-2005, All tags...
SUTRA model used to evaluate the role of uplift and erosion in the persistence of saline groundwater in the shallow subsurface A modified version of the three-dimensional, variable-density solute-transport model (SUTRA) was developed to simulate the effects of erosion and uplift on the flushing of brine with meteoric water in Permian through Mississippian rocks of the Appalachian Plateaus. The model was run in 10-Ma transient simulations for a range of values of permeability and anisotropy. Model results indicate that the depth of shallow Paleozoic brine in the Appalachian Plateaus is controlled by the flushing rate of brine and the uplift/erosion rate. Knowledge concerning the erosion rate and the depth of brine can allow estimation of the effective regional permeability of the sedimentary rock. This USGS data release contains all of the... Tags: Appalachian Plateaus, Groundwater, Groundwater Model, InlandWaters, NSDI, All tags...

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