Hydrogeologic Evaluation and Numerical Simulation of the Death Valley Regional Ground-Water Flow System, Nevada and California

Abstract

A computer program (MODFLOWP) for estimating parameters of a transient, threedimensional, groundwater flow model using nonlinear regression: U.S. Geological Survey Open-File Report 91484,358 p.-1 994, Five computer programs for testing weighted residuals and calculating linear confidence and prediction intervals on results from the groundwater parameter-estimation computer program MODFLOWP: U.S. Geological Survey Open-File Report 93481,81 p.

Modeling of Groundwater Flow and Radionuclide Transport at the Climax Mine sub-CAU, Nevada Test Site

“…The general characteristics of the DVRFS model as they pertain to this study are summarized below from Belcher et al (2004). The DVRFS model utilizes the threedimensional groundwater flow code MODFLOW-2000 (version 1.13) (Harbaugh et al, 2000) and related modular flow packages to simulate flow in the greater Death Valley region, covering an area similar to previous regional models developed for Yucca Mountain (D'Agnese et al, 1997) and the NTS (IT, 1996d) (Figure 2-13). The MODFLOW-2000 code will hereafter be referred to in this report as MODFLOW.…”

Nevada National Security Site Environmental Report 2010, Attachment A: Site Description

“…The direction of groundwater flow may locally be influenced by structure, rock type, or other geologic conditions. Based on existing water-level data (Hale et al, 1995;Reiner et al, 1995;IT, 1996b;BN, 2003;Fenelon et al, 2008) and flow models (IT, 1996a;D'Agnese et al, 1997;Stoller-Navarro Joint Venture [SNJV], 2006a;2007;Navarro Nevada Environmental Services, LLC [NNES], 2010a;2010b), the general groundwater flow direction within major water-bearing units beneath the NNSS is to the south and southwest.…”

Institutional Control Policies and Implementation for the Area 5 and Area 3 Radioactive Waste Management Sites

“…The regional groundwater flow models for the Death Valley Regional Groundwater Flow System have been developed and used to provide boundary conditions and boundary fluxes for UGTA CAUs (DOE, 1997;D'Agnese et al, 1997;Belcher, 2004). The Frenchman Flat CAU has progressed through the first phase of the data collection, evaluation, and modeling cycle (flow and transport models).…”