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Development Of Hydraulic Relationships For Estimating In-Bank River Discharge Using Remotely Sensed Data, David Michael Bjerklie
Development Of Hydraulic Relationships For Estimating In-Bank River Discharge Using Remotely Sensed Data, David Michael Bjerklie
Doctoral Dissertations
An evaluation of river hydraulic data currently or potentially available from satellite and other remote platforms was completed, and a set of discharge estimation models proposed that can use the remotely sensed information to estimate discharge with reasonable accuracy. Reasonable accuracy is defined as within +/-20% of the observed on average for a large number of estimates. The proposed estimation models are based on the Manning and Chezy flow resistance equations, and utilize combinations of potentially observable variables including water-surface width, maximum-channel (or bankfull) width, mean water depth, mean maximum-channel depth, mean water velocity, and channel slope. Both statistically and …
Contributions To Predicting Contaminant Leaching From Secondary Materials Used In Roads, Defne S. Apul
Contributions To Predicting Contaminant Leaching From Secondary Materials Used In Roads, Defne S. Apul
Doctoral Dissertations
Slags, coal ashes, and other secondary materials can be used in road construction. Both traditional and secondary materials used in roads may contain contaminants that may leach and pollute the groundwater. The goal of this research was to further the understanding of leaching and transport of contaminants from pavement materials. Towards this goal, a new probabilistic framework was introduced which provided a structured guidance for selecting the appropriate model, incorporating uncertainty, variability, and expert opinion, and interpreting results for decision making. In addition to the framework, specific contributions were made in pavement and embankment hydrology and reactive transport, Bayesian statistics, …
Chemical Heterogeneity Of Glaciofluvial Deposits: Outcrop Study And Implications For Reactive Transport, Gordon M. Sturgeon
Chemical Heterogeneity Of Glaciofluvial Deposits: Outcrop Study And Implications For Reactive Transport, Gordon M. Sturgeon
Doctoral Dissertations
Spatial variations in the reactive properties of geologic systems and their influence on contaminant transport are poorly understood. Consequently, an outcrop study was conducted in a glaciofluvial deposit in Deerfield, New Hampshire in order to: (1) identify the sediment properties controlling heavy metal adsorption, (2) evaluate the extent to which geologic information can be used to characterize their spatial variation, and (3) assess the impact of spatial variations on heavy metal transport. Four hundred seventy-six, spatially-located sediment samples were collected from an eight square meter vertical exposure of outwash sands and gravels. Lithologic facies were mapped on outcrop photographs. Sample …