Open-File Report 2006–1104
U.S. GEOLOGICAL SURVEY
Open-File Report 2006–1104
Table 1. MODFLOW-2000 packages and processes used in the Death Valley regional ground-water flow system model, Nevada and California.
[Package or process: BAS6, Basic Package; CHD, Constant-Head Boundary Package; DRN, Drain Package; GLO, Global Process; GWF, Ground-water Flow Process; HFB6, Horizontal-Flow Barrier Package; HUF2, Hydrogeologic Unit Flow Package; MNW1, Multi-Node Well Package; OBS, Observation Process; PCG2, Preconditioned Conjugate-Gradient Package; PES, Parameter-Estimation Process; RCH, Recharge Package; SEN, Sensitivity Process; ZONE, zone file]
| Package or process | Package or process file type | Input file name | Reference | |
|---|---|---|---|---|
| Global Process (including the discretization file (DIS), multiplier file (MULT), name, and ZONE files and utility modules) | GLO | DIS_WT_CONFINED.txt, MULT.txt, NAME.txt, ZONE.txt | Harbaugh and others (2000) | |
| Groundwater Flow Process [including the Output Control Option (OC)] | GWF | OC.txt | Harbaugh and others (2000) | |
| Basic Package | BAS6 | BAS_active.txt | Harbaugh and others (2000) | |
| Hydrogeologic Unit Flow Package [including depth decay file (KDEP)] | HUF2 | HUF2_CONFINED.txt, KDEP.txt | Anderman and Hill (2000, 2003) | |
| Horizontal-Flow Barrier Package | HFB6 | HFB_final_tr.txt | Harbaugh and others (2000) | |
| Recharge Package | RCH | RCH_tr.txt | Harbaugh and others (2000) | |
| Multi-Node Well Package | MNW1 | MNW_withdrawal_1_7_20.txt1 | Halford and Hanson (2002) | |
| Drain Package | DRN | DRN_tr.txt | Harbaugh and others (2000) | |
| Constant-Head Boundary Package | CHD | CHD_15reg_tr.txt | Harbaugh and others (2000) | |
| Preconditioned Conjugate-Gradient Package | PCG2 | PCG.txt | Hill (1990); Harbaugh and others (2000) | |
| Observation Process [including Constant-Head Flow Observation Package (CHOB), Drain Observation Package (DROB), and Head Observation Package (HOB)] | OBS | OBS.txt, CHOB_15reg.txt, DROB_tr.txt, HOBs_sstr.txt | Hill and others (2000) | |
| Sensitivity Process | SEN | SENSITIVITY.txt | Hill and others (2000) | |
| Parameter-Estimation Process | PES | PES.txt | Hill and others (2000) | |
1The MNW1 Package has an option to create an equivalent file in the WEL1 Package format. This file, wel_package.wl1, is included in the model archive.
For more information about USGS activities in Nevada, visit the USGS Nevada Water Science Center home page.
U.S.
Department of the Interior | U.S. Geological
Survey
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