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Articles 1 - 3 of 3
Full-Text Articles in Civil Engineering
Reviews And Syntheses: Ocean Acidification And Its Potential Impacts On Marine Ecosystems, Khan M.G. Mostofa, Cong-Qiang Liu, Weidong Zhai, Marco Minella, David Vione, Kunshan Gao, Daisuke Minakata, Et.Al
Reviews And Syntheses: Ocean Acidification And Its Potential Impacts On Marine Ecosystems, Khan M.G. Mostofa, Cong-Qiang Liu, Weidong Zhai, Marco Minella, David Vione, Kunshan Gao, Daisuke Minakata, Et.Al
Department of Civil, Environmental, and Geospatial Engineering Publications
Ocean acidification, a complex phenomenon that lowers seawater pH, is the net outcome of several contributions. They include the dissolution of increasing atmospheric CO2 that adds up with dissolved inorganic carbon (dissolved CO2, H2CO3, HCO3−, and CO32−) generated upon mineralization of primary producers (PP) and dissolved organic matter (DOM). The aquatic processes leading to inorganic carbon are substantially affected by increased DOM and nutrients via terrestrial runoff, acidic rainfall, increased PP and algal blooms, nitrification, denitrification, sulfate reduction, global warming (GW), and by atmospheric CO2 itself through enhanced photosynthesis. They are consecutively associated with enhanced ocean acidification, hypoxia in acidified …
A Sustainability-Based Project Selection Algorithm: Socio-Technical-Economic Project Selection (Steps) Algorithm, Bharathi Bhattu
A Sustainability-Based Project Selection Algorithm: Socio-Technical-Economic Project Selection (Steps) Algorithm, Bharathi Bhattu
Dissertations, Master's Theses and Master's Reports
Multi-dimensional aspects play a vital role in the task of project-decision making. Environmental effects are to be considered in addition to other technical and non-technical aspects in order to avoid undue environmental damage. This current work introduces a new decision-making algorithm (Socio-Technical-Economic Project Selection or STEPS) that is demonstrated with the use of RCA (recycled concrete aggregate) as riprap for slope stabilization and erosion control which leaches chemical arsenic when in contact with water. Arsenic has long been recognized for its lethal properties. The main intention of introducing this new algorithm is to use sustainability concepts of social, technical, and …
A Characterization Of The Water Quality Conditions And Pollutant Loads In Surface Waters Near The Northeast Ohio Regional Sewer District’S Combined Sewer System In Cleveland, Ohio, Nathan Zgnilec
Dissertations, Master's Theses and Master's Reports
The Northeast Ohio Regional Sewer District (NEORSD, Cleveland, OH) serves over one million citizens through the operation of three waste water treatment plants. NEORSD provides this service through combined and separated sewer systems, which, during rainfall events, are known to deliver large volumes of untreated wastewater containing high concentrations of Escherichia coli (E.coli), ammonia nitrogen, and phosphorus. NEORSD is currently investing $3 billion over the next 25 years to mitigate its combined sewer overflows and plans to allocate additional funds to improve remaining pollutant sources related to its system, e.g. separated sewers. A suite of PC-SWMM pollutant loading models have …