In this study, a stand-alone sediment and contaminant model, SEDDEER (Sediment Deposition and Erosion), is presented. The model simulates one water box and underlying (multiple) sediment bed layers, and was developed for incorporation into water quality models. The processes incorporated in the model are: settling and deposition, resuspension, equilibrium adsorption/desorption, sediment-water i...

We used coupled watershed and reservoir models to evaluate the impacts of deforestation and l Niño Southern Oscillation (ENSO) phase on drinking water quality. Source water total organic carbon (TOC) is especially important due to the potential for production of carcinogenic disinfection byproducts (DBPs). The Environmental Fluid Dynamics Code (EFDC) reservoir model is used to evaluate the diff...

Dam operation is regarded as an effective way to increase water, food, and energy security for society. However, with the increasing water demand frequent extreme droughts, numerous rivers worldwide go through periods of scarcity ecosystem deterioration varying degrees. Balancing supply ecological flow dam-regulated river network essential in context restoration. In this study, we proposed a hy...

Marine and hydrokinetic (MHK) technology performance testing in the laboratory and field supports the US Department of Energy’s MHK program goals to advance the technology readiness levels of MHK machines, to ensure environmentally responsible designs, to identify key cost drivers, and to reduce the cost of energy of MHK technologies. Laboratory testing results from scaled model machine testing...

In order to improve the forecasting ability of numerical models, a sequential data assimilation scheme, nudging, was applied to blend remotely sensing high-frequency (HF) radar surface currents with results from a three-dimensional numerical, EFDC (Environmental Fluid Dynamics Code) model. For the first time, this research presents the most appropriate nudging parameters, which were determined ...

Vectorized isosurface mapping is critical for conducting scientific research in computational fluid dynamics (CFD). We provide a Python-based tool the vectorized of scalar field information CFD simulation results, with goal reducing file size while ensuring editability and graphical presentation independent resolution. The ideal interpolation angle first determined by spatially rotating target ...