Waste management involves the calculation of how much, how far, and how fast a contaminant will move in the ground. The analysis of such a situation involves the complex coupling of groundwater flow, diffusion, advection, dispersion/decay and possibly reactive transport. The software solution needs to be able to quickly calculate possible remedial solutions and their effectiveness.
SVOFFICE™5/GE offers an advanced fully coupled solution for groundwater flow, diffusion, adsorption, advection, and decay. The mesh refinement in the software makes for increased accuracy of calculations along a contaminant front. SVOFFICE™5/WR offers groundwater flow, diffusion, advection, adsorption and decay as well as access to reactive transport features. Use of the FEHM solver by the WR package offers high-end computational capabilities applied to this problem.
The Challenge
Many types of wastes are stored in containment facilities surrounded by earth barriers and potentially lined with clay material. It is of general interest to the owners of such properties to determine where contaminants stored in such facilities will end up years down the road.
The Solution
The SVCHEM™ software allows prediction of the movement of contaminants within the soil. When coupled with SVFLUX™ the advective movement of contaminants can be determined. The software can be used to determine compliance of design with environmental regulatory agencies.
The Challenge
Movement of contaminants is important in the design of waste containment structures. Such movement can happen by diffusion, advection, adsorption, decay as well as the potential for for reactive transport.
The Solution
SVFLUX™ & SVCHEM™GE/WR can be coupled in order to provide a comprehensive solution for the modeling of contaminant movement. WR also provides the ability for the modeling of reactive transport flow.
The Challenge
The increased use of geomembranes and geotextiles in engineering design has required the considering of such materials in a numerical analytical solution. The modeling of such geofabrics can be challenging and requires special consideration in numerical models.
The Solution
SVFLUX™GE provides consideration of low-permeability layers in the software such that geomembranes can be modeled. SVSLOPE® allows the modeling of special geotextile objects where the tensile and shear strength of the material is considered in the calculation of the factor of safety (FOS).
The Challenge
The design of landfills requires modeling both in terms of i) stability, ii) cover design to limit water/oxygen flow, and iii) contaminant movement out of the landfill. Such analysis can be challenging to perform in a numerical model.
The Solution
SVSLOPE® contains a wide variety of constitutive models in order to numerically model the stability of landfills. SVFLUX™ implements a comprehensive Fredlund-Wilson-Penman method of evaluating actual evaporation for a cover design and can model both water and air flow through a cover. Contaminant movement of the diffusion, advection, adsorption, and decay processes can be modeled extensively through the SVCHEM™ module. Reactive transport can be modeled by SVCHEM™WR.
Software Solutions
SVFLUX™, SVCHEM™, SVSOILS™, SVSLOPE®, SVDESIGNER™
Storage of wastewater in ponds requires numerical modeling of how far and how fast potential contaminants may move over time.
The Solution
SVFLUX™& SVCHEM™ can provide advanced solutions modeling diffusion, advection, adsorption, and decay of contaminants over time. SVCHEM™WR can also model the reactions of contaminants as they move through soils.
The Challenge
Soil-vapor extraction (SVE) can be utilized to pump air through soils to remove contaminants which vaporize easily.
The Solution
SVFLUX™ & SVAIR™ can be coupled to model the relationship between pore-air flow and pore-water flow in the unsaturated zone. Solutions can be in 2D and 3D.
The Challenge
The design of earth covers is a common way to manage waste for landfills or mining operations. The analysis of cover design involves the complex interaction of climate, actual evaporation, and unsaturated flow.
The Solution
SVFLUX™GE/GT implements the advanced Fredlund-Wilson-Penman climatic boundary condition which makes use of weather station data in order to calculate unsaturated pore-water flow through an earth cover.
