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Full-Text Articles in Physical Sciences and Mathematics
Sources And Transport Pathways Of Fecal Bacteria And Pathogens To Aquifers In Rural Bangladesh, Peter S. K. Knappett
Sources And Transport Pathways Of Fecal Bacteria And Pathogens To Aquifers In Rural Bangladesh, Peter S. K. Knappett
Doctoral Dissertations
During the 1980’s millions of households in Bangladesh switched from drinking surface water to private groundwater wells to reduce their exposure to fecal microorganisms. Sadly, this switch to shallow groundwater resulted in the largest example of drinking water poisoning in history, with approximately 100 million people exposed to high concentrations of naturally occurring Arsenic in the groundwater. Spatial distribution of Arsenic in the shallow aquifers tends to be patchy, so the most economical mitigation option has been lateral switching from high Arsenic wells to nearby low Arsenic wells. The recently developed Arsenic flushing conceptual model, which explains the spatial distribution …
Effects Of 2000-2050 Global Climate Change On Ozone And Particulate Matter Air Quality In The United States Using Models-3/Cmaq System, Yun-Fat Lam
Doctoral Dissertations
The Models-3/Community Multi-scale Air Quality modeling system (CMAQ), coupled with Goddard Institute for Space Studies (GISS) atmospheric General Circulation Model (GCM), fifth Generation Mesoscale Model system (MM5), and Goddard Earth Observing System-CHEMistry (GEOS-Chem), was used to simulate atmospheric concentration of ozone and particulate matter over the continental United States 12-km and 36-km (CONUS) domains at year 2000 and year 2050. In the study, GISS GCM model outputs interfaced with MM5 were utilized to supply the current and future meteorological conditions for CMAQ. The conventional CMAQ profile initial and boundary conditions were replaced by time-varied and layer-varied GEOS-Chem outputs. The future …