Contaminant hydrology is the study of processes that affect both ground and surface water pollution. It draws on the principles of hydrology and chemistry. Contaminant hydrology and water quality research seeks to understand the role of soil properties and hydrologic processes on ground and surface water pollution and develop strategies to mitigate their impacts. Research is done at all scales ...

Mobile colloidal particles have been identified to be involved in a broad variety of environmentally relevant processes. A considerable number of these processes may have hazardous consequences. Most recently, mobile colloidal particles have been reported to be a potentially relevant transport pathway for strongly sorbing contaminants. Thereby the colloidal particles act as highly mobile contam...

UNLABELLED In case contaminants are found in enclosed environments such as aircraft cabins or buildings, it is useful to find the contaminant sources. One method to locate contaminant sources is by inverse computational fluid dynamics (CFD) modeling. As the inverse CFD modeling is ill posed, this paper has proposed to solve a quasi-reversibility (QR) equation for contaminant transport. The equa...

In situ bioremediation is a groundwater and soil remediation technology that makes use of indigenous or introduced microorganisms to degrade contaminants in the subsurface. One factor affecting the feasibility of in situ bioremediation is the availability of the contaminant to the microorganisms. It is typically assumed that the contaminant is only available for biodegradation in the aqueous ph...

In this paper we consider the problem of estimating transport and biodegra-dation parameters in a contaminant transport model. We develop a convergence theory for parameter identiication under approximation that includes the nonlinearities inherent in the biodegradation models. The functional analytic approach provides a means for studying a variety of solute transport and biodegradation problems.

Salt wedges divide coastal groundwater flow regime into two distinct regions that include a freshwater region above the saltwater-freshwater interface and a saltwater region below the interface. Several recent studies have investigated saltwater transport in coastal aquifers and the associated flow and mixing processes. Most of these studies, however, have either focused on studying the movemen...

rivers are one of the major resources of drinking and agriculture water, so accurate control and modeling of their water quality is essential for protection of human health and environment stability. transient storage zones have a great effect on contaminant transport, especially in small mountain streams. the main effects include temporary detainment of solute and decrease its concentration in...

Federal, state, and local govermnent agencies are issuing more and more regulations to protect groundwater from microbial contamination. Regulations being proposed include the establishment of wellhead protection zones, drinking-water standards for viruses and parasites, and septic tank placement ordinances. Microbiologists are being called upon more frequently than ever to work with the engine...

Dermal exposure, primarily to pesticides, has been measured for almost half a century. Compared with exposure by inhalation, limited progress has been made towards standardisation of methods of measurement and development of biologically relevant exposure measures. It is suggested that the absence of a consistent terminology and a theoretical model has been an important cause of this lack of pr...