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Full-Text Articles in Civil Engineering
Reduction Of Pertechnetate From Off-Gas Condensate Using Aged Zero-Valent Iron As A Reducing Agent, Abraham T. Gebru
Reduction Of Pertechnetate From Off-Gas Condensate Using Aged Zero-Valent Iron As A Reducing Agent, Abraham T. Gebru
FIU Electronic Theses and Dissertations
The Hanford site located in Washington State was one of the major nuclear processing facilities in the U.S. where plutonium was produced between the 1940s and the 1980’s. As a result of this forty yearlong production, approximately 53 million gallons of radioactive waste was generated and currently stored in 177 single and double shelled underground tanks. There were around 60 major and minor leaking incidents in the tanks through the years. These leaking incidents were wakeup calls to a search for an effective long term disposal solution. This paper will concentrate on the low activity waste (LAW), specifically the radioactive …
Impacts Of Climate, Land Cover And Hydrologic Changes On Stormwater Runoff In Central Florida, Mohammad S. Islam
Impacts Of Climate, Land Cover And Hydrologic Changes On Stormwater Runoff In Central Florida, Mohammad S. Islam
FIU Electronic Theses and Dissertations
Changes in climate and land use/cover can cause great impacts on the hydrologic processes, especially on stormwater runoff generation. Considering the Shingle Creek Basin in Central Florida as an example of complex inland urban-natural basins, we quantified reference sensitivities of stormwater runoff to plausible scenarios of climatic, land use/cover and hydrologic changes by developing a dynamic rainfall-runoff model with the EPA Storm Water Management Model (SWMM 5.1). Potential storm runoff in the coupled urban-natural basin exhibited high and notably different seasonal sensitivities to rainfall. The total basin runoff was highly sensitive to the basin imperviousness, while showing moderate to low …
Long-Term Trends In Magnitude And Frequency Of Extreme Rainfall Events In Florida, Tasnuva Mahjabin
Long-Term Trends In Magnitude And Frequency Of Extreme Rainfall Events In Florida, Tasnuva Mahjabin
FIU Electronic Theses and Dissertations
This study computed trends in extreme precipitation events of Florida for 1950-2010. Hourly aggregated rainfall data from 24 stations of the National Climatic Data Centre were analyzed to derive time-series of extreme rainfalls for 12 durations, ranging from 1 hour to 7 day. Non-parametric Mann-Kendall test and Theil-Sen Approach were applied to detect the significance of trends in annual maximum rainfalls, number of above threshold events and average magnitude of above threshold events for four common analysis periods. Trend Free Pre-Whitening (TFPW) approach was applied to remove the serial correlations and bootstrap resampling approach was used to detect the field …
Integration Of A Sedimentation Module To A Hydrologic Model And Its Application To A Mercury Tmdl Analysis, Lilian Marrero
Integration Of A Sedimentation Module To A Hydrologic Model And Its Application To A Mercury Tmdl Analysis, Lilian Marrero
FIU Electronic Theses and Dissertations
This research is part of continued efforts to correlate the hydrology of East Fork Poplar Creek (EFPC) and Bear Creek (BC) with the long term distribution of mercury within the overland, subsurface, and river sub-domains. The main objective of this study was to add a sedimentation module (ECO Lab) capable of simulating the reactive transport mercury exchange mechanisms within sediments and porewater throughout the watershed. The enhanced model was then applied to a Total Maximum Daily Load (TMDL) mercury analysis for EFPC. That application used historical precipitation, groundwater levels, river discharges, and mercury concentrations data that were retrieved from government …
A Model For Continuous Measurement Of Drilled Shaft Diameter During Construction, Masood Hajali
A Model For Continuous Measurement Of Drilled Shaft Diameter During Construction, Masood Hajali
FIU Electronic Theses and Dissertations
Non-Destructive Testing (NDT) of deep foundations has become an integral part of the industry’s standard manufacturing processes. It is not unusual for the evaluation of the integrity of the concrete to include the measurement of ultrasonic wave speeds. Numerous methods have been proposed that use the propagation speed of ultrasonic waves to check the integrity of concrete for drilled shaft foundations. All such methods evaluate the integrity of the concrete inside the cage and between the access tubes. The integrity of the concrete outside the cage remains to be considered to determine the location of the border between the concrete …