Assessment of the contamination of drinking water supply wells by pesticides from surface water resources using a finite element reactive transport model and global sensitivity analysis techniques

Non-stationary nonparametric inference of river-to-groundwater travel-time distributions

“…The most profound way of analyzing tracer time series in a bank-filtration system would be by calibrating a mechanistic, spatially explicit coupled river-groundwater flow-and-transport model (e.g., Malaguerra et al, 2013). This is often not possible, because the exact river bathymetry, distribution of hydraulic subsurface parameters, and boundary conditions are not known.…”

Modelling contaminant transport for pumping wells in riverbank filtration systems

“…Several efforts have been devoted to understanding the behaviour of contaminants in the subsurface (Dash et al, 2010;Dillon et al, 2002;Hoppe-Jones et al, 2010;Malaguerra et al, 2013;Singh et al, 2010b;Thakur et al, 2013). These efforts involve studying chemical, biological and physical processes that describe the contaminant attenuation and transportation.…”

“…These efforts involve studying chemical, biological and physical processes that describe the contaminant attenuation and transportation. Understanding these processes is most useful for various environmental applications, such as in situ bio-remediation (Chen-Charpentier and Kojouharov, 2008), riverbank filtration (Dash et al, 2010;Dillon et al, 2002;Hiscock and Grischek, 2002;Holzbecher, 2006;Malaguerra et al, 2013), and protection of drinking water supplies (Zhang et al, 2008). An improved comprehension of the factors controlling the fate and transport of contaminants in RBF systems is also important in planning and managing new sites.…”

“…Mathematical models of groundwater pollution have been studied in literature since at least 1961 (Domenico, 1987;Elfeki et al, 2007;Kim, 2005;Leij et al, 1993;Lin et al, 2010;Malaguerra et al, 2013;Meenal and Eldho, 2012;Ogata and Banks, 1961;Park and Zhan, 2001;Schwartz, 1975;Sen et al, 2002;Yeh and Tsai, 1976). Usually, mathematical models of groundwater pollutants transport involve a simplified form of the advection dispersion equation that can be derived from basic mass balance principles.…”

“…Both numerical and analytical techniques have been used for different problems that have arisen in groundwater pollution. Numerically, finite difference and finite element methods are the common approaches implemented by researchers (Doussan et al, 1998;Kim, 2006;Kim et al, 2003;Malaguerra et al, 2013). Alternately, Laplace and Fourier transforms are normally used to analytically estimate solute transport in aquifers (Chen, 2010;Chen et al, 2012;Connell, 2007;Singh et al, 2012;Singh, 2013).…”