logmein-verification-code.txtThrough a research initiative between Schlumberger Water Services and University of Neuchatel, Switzerland, a new methodology to model karst conduits was developed in a stochastic framework. The research work has concluded, and we uploaded the article presenting the results achieved along with a 30 min. video registered during a webinar organized by the two parties above.
A preview of the new MODFLOW-USG (UnStructured Grids) was unveiled by Sorab Panday and Chris Langevin at the 2011 MODFLOW and More Conference. Since then, the excitement around this new program has been building, and we have received numerous inquiries from Visual MODFLOW Flex users. So, what is MODFLOWUSG, and how is it different from conventional MODFLOW? We interviewed Sorab Panday, one of the co-authors of the code, to learn a little more about the program and its features.
The ï¬rst versions of the widely used groundwater flow model MODFLOW (McDonald and Harbaugh 1988) had a sure but inflexible way of handling unconï¬ned ï¬nite-difference aquifer cells where the water table dropped below the bottom of the cell—these "dry cells" were turned inactive for the remainder of the simulation. Problems with this formulation were easily seen, including the potential for inadvertent loss of simulated recharge in the model (Doherty 2001; Painter et al. 2008), and rippling of dry cells through the solution that unacceptably changed the groundwater flow system (Juckem et al. 2006).
Contamination of groundwater with chlorinated ethenes is common and represents a threat to drinking water sources. Standard anaerobic bioremediation methods for the highly chlorinated ethenes PCE and TCE are not always effective in promoting complete degradation. In these cases, the target contaminants are degraded to the daughter products DCE and/or vinyl chloride.
Karst