Mixing-transport of solute entering at sinkholes or from within the limestone matrix in cavernous conduits is an important process for contaminant migration in karst aquifers. This process may be described with a one-dimensional advection-dispersion equation incorporating the fluxes of solute and water across the conduit wall. For the dilution-dispersion equation, which does not include solute ...

The Massachusetts Military Reservation is located in the western portion of Cape Cod. World War II and the period immediately afterward saw the most intense military activity on the base. During this time, chemicals leached into the groundwater and contaminated the aquifer. One of the larger regions, or plumes, of groundwater contamination is the Chemical Spill 10 (CS10) plume, a region in whic...

Brian B. Looney A US EPA directive and related technical protocol outline the information needed to determine if monitored natural attenuation (MNA) for chlorinated solvents is a suitable remedy for a site. For some sites, conditions such as complex hydrology or perturbation of the contaminant plume caused by an existing remediation technology (e.g., pump-and-treat) make evaluation of MNA using...

A multi-dimensional and multi-species reactive transport model was developed to aid in the analysis of natural attenuation design at chlorinated solvent sites. The model can simulate several simultaneously occurring attenuation processes including aerobic and anaerobic biological degradation processes. The developed model was applied to analyze field-scale transport and biodegradation processes...

Abstract Dumpsite is a widespread land meant or designed for deposition of waste and unwanted materials from household, institutions, industries the environment generally open covered with soil layer without liner at bottom. Dump/landfill major source contamination groundwater. This study therefore to review studies on impact groundwater due dumpsites using geophysical physiochemical methods. T...

Chlorinated solvents are the most prevalent organic contaminants found in ground water (Stroo et al. 2003), and in the dissolved phase they are typically mobile and recalcitrant, particularly trichloroethylene (TCE) and tetrachloroethylene (PCE). Schwille (1984, 1988) was the first to recognize that chlorinated solvent plumes (i.e., zones of dissolved phase contaminants) are caused by immobile ...