Geological
& Environmental Services, Inc.
Geological
& Environmental Services, Inc.
Groundwater & Aquifer Analysis
CRB personnel have extensive experience in conducting varied tests to determine aquifer characteristics for drainage and remedial designs. This experience translates into our ability to incorporate the site-specific geologic variables into the design of field tests such as:
Members of the aquifer analysis group at CRB have conducted and analyzed numerous aquifer tests of various types. Their experience enables them to easily recognize site conditions which must be included to ensure valid test results.
Groundwater Modeling
CRB offers services in groundwater hydrology and related fields covering a wide spectrum of analytical and computational capabilities. These capabilities range from simple analytical solutions of groundwater problems to the applications of sophisticated numerical models. These methods have been applied to several problems ranging from local environmental impact studies to remedial investigations and feasibility studies at underground tank sites, RCRA and CERCLA sites.
The CRB groundwater hydrology team has demonstrated its expertise in a number of different areas of groundwater hydrology and associated numerical analysis. Its capabilities may be grouped within the following categories:
* Groundwater engineering
* Vadose zone analysis
* Saturated zone analysis
* Groundwater resource management
Groundwater Engineering
CRB provides state-of-the-art groundwater flow analysis capabilities. These capabilities include:
* Assessment of impact of land use changes on groundwater resources
* Evaluation of dewatering designs for deep and surface mines, foundations, and other similar projects
* Investigation of problems involving stream-aquifer interaction
* Evaluation of groundwater flow and storage
* Remedial and extraction systems design
* Cone of influence assessments for wellfields
Vadose Zone Analysis
Of major environmental concern is water and solute movement in the unsaturated zone associated with leaking underground storage tanks, waste disposal operations, solid waste landfills, septic tanks, agricultural irrigation, mine spoils, or road deicing salts. CRB is experienced with a number of recently developed techniques for analyzing such situations. These techniques include:
* Analytical models of water infiltration and adsorption
* Analytical and numerical models of subsurface vapor transport
* Quasi-analytical models of solute transport
* Numerical models of water and solute transport
Saturated Zone Analysis
Typical methods of approaching and obtaining solutions to groundwater problems include:
* Numerical models of water and solute transport
* Automated flow net analysis
* Recharge analysis
* Steady state and/or transient three-dimensional finite-element groundwater models
* Cross-sectional (vertical) phreatic-surface seepage models
* Single cell lumped parameter or multiple cell groundwater quality models
* Analytical solutions to the convective-dispersion equation for contaminant plumes
* Advection/time of travel studies using flow nets
* Particle tracking models
* Transient random-walk solute transport models, which include decay and partitioning
* Three-dimensional sharp interface flow models for simulation of floating product
Groundwater Resource Management
The development and implementation of groundwater management plans is becoming increasingly important. Recent studies performed by CRB personnel have centered on groundwater management and control issues in several different geographic areas. Some of the analytical tools and methodologies employed are:
* Analysis of legal and institutional aspects of groundwater development and management
* Optimization models for the design and operations of aquifer systems
* Conjunctive groundwater/surface water supply optimization models
* River basin simulation modeling with groundwater interaction
* Observation well network design
Other Services