Accession Number:

ADA399450

Title:

Basin F Subregional Groundwater Model

Descriptive Note:

Final rept.

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB

Personal Author(s):

• Mazion, Edward, Jr.
• May, James H.
• Abraham, Benita
• Corcoran, Maureen K.

Report Date:

2001-09-01

Pagination or Media Count:

344.0

Abstract:

The groundwater flow system at Rocky Mountain Arsenal RMA is complex. To evaluate proposed remedial alternatives, interaction of the local groundwater flow system with the present contamination control systems must be understood. The purpose of this modeling effort is to provide a tool for evaluation and relative comparison of groundwater remedial alternatives. The model provides a method to assess the local groundwater impact of each remedial alternative. Results from the modeling effort will be used to compare the preliminary design of various remedial alternatives and allow general modification and reconfiguration of those designs to optimize their performance as part of the Detailed Analysis of Alternatives DAA of the Feasibility Study FS. Specific objectives of the modeling effort were developed based on the FS modeling needs established by RMA. Objectives are used to assist in defining the goals and associated scope of work of the modeling effort and address the need for modeling during the DAA of the FS, which requires comparison of remedial alternatives that have been retained. Objectives also allow for some flexibility in the analysis, such as combination or addition of remedial alternatives during subsequent phases of the FS. This modeling effort accounts for groundwater flow in the upper Denver Fm. This approach differs from the majority of previous modeling efforts, which treat unsaturated alluvium areas as impermeable and do not address flow in the Denver Fm. Exchange of groundwater between the alluvium and the Denver Fm sands, basins, and precipitation infiltration is handled by areal inputs. The model was calibrated by applying the existing concepts of flow in the modeled area to reproduce known water levels, groundwater discharge and recharge, and the flux through the aquifer system and across boundaries. It is the intent of this modeling effort to incorporate all current pertinent hydrogeologic data into the model.

Descriptors:

• *WATER POLLUTION ABATEMENT
• *GROUND WATER
• COMPUTER PROGRAMS
• WATER FLOW
• CONTROL SYSTEMS
• SAND
• ALLUVIUM
• SATURATION
• PRECIPITATION
• INFILTRATION(FLUIDS)
• CLAY
• CONTAMINATION
• BASINS(GEOGRAPHIC)
• WATER TABLE
• SILT
• GEOLOGIC FORMATION
• HYDRAULIC CONDUCTIVITY

Subject Categories:

• Hydrology, Limnology and Potamology
• Water Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE