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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, …
The Influence Of Urbanization On Runoff Generation And Stream Chemistry In Massachusetts Watersheds, Brian A. Pellerin
The Influence Of Urbanization On Runoff Generation And Stream Chemistry In Massachusetts Watersheds, Brian A. Pellerin
Doctoral Dissertations
The conversion of forested and agricultural land to suburban and urban landscapes is a dominant land use change dynamic in the United States and has implications for watershed hydrology and water quality. Here I evaluate the effect of integrated landscape features (e.g., percent residential or developed) and watershed-scale attributes influenced by urbanization on stream nutrient concentrations in headwater catchments in Massachusetts. In addition, I evaluate the importance of surface versus subsurface flow paths during rainfall events in stormflow generation in a small urban catchment. The percentage of residential land explains 52% of the variability in mean annual nitrate (NO3) concentrations …