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Disinfection Byproduct (Dbp) Precursors In Central Ma, Cynthia M. Castellon
Disinfection Byproduct (Dbp) Precursors In Central Ma, Cynthia M. Castellon
Environmental & Water Resources Engineering Masters Projects
Controlling disinfection byproduct formation is one of the biggest challenges facing drinking water providers. This report examines two issues regarding disinfection byproducts in public water systems: 1) watershed sources of DBP precursors and watershed characteristics, such as precipitation, season, and land use, which influence DBP formation; and, 2) factors, such as treatment practices, season, and raw water quality, that affect DBP formation at water treatment plants and in distribution systems. In order to analyze these issues, this project utilized two databases, one consisting of DBP precursor data from Wachusett Reservoir located in Central Massachusetts, and the other consisting of historical …
Bioretention Systems For Control Of Non-Point Sources Of Nitrogen, Ryan L. Siegel
Bioretention Systems For Control Of Non-Point Sources Of Nitrogen, Ryan L. Siegel
Environmental & Water Resources Engineering Masters Projects
Environmental protection programs have successfully improved water quality over the past few decades through the control of point sources of nitrogen. However, control of non-point sources of nitrogen, such as atmospheric deposition, leaking septic systems, runoff and agricultural runoff, has lagged. There is unanimous agreement that arresting nitrogen influxes into aquatic ecosystems is essential to control eutrophication. Protecting drinking water sources from elevated levels of nitrate and nitrite nitrogen from non-point sources is also necessary to protect public health. Elevated levels of nitrate and nitrite in drinking water are known to cause methemoglobinemia (blue-baby syndrome) in infants. The overall objective …
Vertical Dispersion And Oxygen Demand Of Deicing, Marina S. Pereira
Vertical Dispersion And Oxygen Demand Of Deicing, Marina S. Pereira
Environmental & Water Resources Engineering Masters Projects
The research site is located in Plymouth, Massachusetts, above the Plymouth Carver Aquifer. It is positioned along side State Route 25 which opened in the summer of 1987 in order to extend Interstate 495 to the Bourne Bridge. Snow/ice removing measures using salt, and an alternate deicing agent, CMA have been practiced since the winter of 1987. The highway runoff is collected into an infiltration basin, allowing salt and CMA to infiltrate the sandy aquifer below. The salt and CMA increase the specific conductivity of the groundwater while, the infiltrated acetate is biodegraded, leading to DO depletion within the aquifer. …