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Showing 1 to 12 of 12 for “"water surface elevations"”.
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Hydraulic Modeling of a River Network for Predicting Flood Inundation using HEC-RAS and GIS Models - A Case Study in Southern Virginia
A flood inundation study is presented for a watershed located in south central Virginia. A HEC-RAS hydrodynamic model of the main river network was developed to assess the impact of a number of hydrologic events, including the Probable Maximum Flood (PMF), in the area of interest. The primary goal …
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Annual Exceedance Probability Analysis
… of AEP maps by illustrating the convergence of water surface elevations computed as part of the hydraulic simulation leading up to the floodplain delineation model. If the average water surface elevations converge, then the resulting floodplain delineation (AEP maps) should also converge. The …
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Hydrodynamic and Water Quality Simulation of Fecal Coliforms in the Lower Appomattox River, Virginia
… River as impaired because it violates current water quality standards for fecal coliforms. To advance the analytical process by which various scenarios for improving water quality within the estuary are examined, an array of computer-based hydrodynamic and water quality models were …
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Estimating Floodplain Vegetative Roughness using Drone-Based Laser Scanning and Structure from Motion Photogrammetry
… measured field data (velocity sensors, groundwater well height, marked flood extents). We used a t-test to find that all models were not significantly different to water surface elevations from our 18 wells in the floodplain (p > 0.05). There was a decrease in RMSE (-0.02 m) using the …
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Dynamic vegetation Roughness in the riparian zone
… and flow depth. Both approaches underpredicted water surface elevation when compared to calibrated models. The difference in water surface elevations between the calibrated models and the roughness models varied with channel discharge, with both approaches performing equally. Both approaches …
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Use of Lidar Data to Investigate the Influence of Bottom Friction Coefficients for Storm Surge Modeling of Hurricane Michael in the Florida Panhandle
… maps coupled with lookup tables to parameterize surface roughness because the process is defensible and easily automated at the regional scale. However, this is not a truly accurate method since LULC data is generalized for an area and often contains misclassifications. Intra-class variability is …
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Validation Of Integrated Coast-Ocean Model Cche2D-Coast And Development Of Wind Model
… discrepancies between numerically simulated water surface elevations and observed tidal elevations at NOAA tide gages are quantified. On the other hand, statistical errors of the tidal constituents parameters, amplitude and phase, are also determined. In this study, the tidal harmonic …
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The effects of selected corn-soybean tillage systems on rill cross-sectional geometry and soil erosion for two Illinois soils
… study, simulated rainfall and additional run-on water were applied to plots that had been subjected to alternative corn-soybean tillage treatments in two soils in central Illinois. Before and after rainfall simulations, a pin type rill meter was used to record soil surface elevations. For each …
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Reach-scale controls of a pool-rapid channel during an extreme flood event : Sabie River, South Africa
… incised 10 – 20 m into the Cainozoic planar surface, producing a mixed-bedrock-alluvial system draining a semi-arid catchment of 7096 km2. The channel sequences between bedrock outcrops alternating with alluvial features and are influenced by rare, high magnitude flood events, which act as a …
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The effect of dikes on water surfaces in a mobile bed
… of bank and designed to be effective only in low water, it is necessary to understand their effect on water surfaces, particularly for flood flows. To help answer questions that have arisen as to the effect of dikes on flood levels, this study considers effect of movable bed, which has been …
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The Effect Of Tidal Inlets On Open Coast Storm Surge Hydrographs: A Case Study Of Hurricane Ivan (2004)
… design storm tide hydrographs for coastal waters surrounding tidal inlets along the coast of Florida. These hydrographs are used as open ocean boundary conditions for local bridge scour models. At present, very little information is available on the effect that tidal inlets have on these …
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Remote sensing for geomorphic and hydrodynamic modeling and process understanding
… determines how hydrodynamic model results (water depths, water velocities, and inundation extent) are affected by drone lidar DEM resolution and computational mesh resolution over 1.5 km of Stroubles Creek in Blacksburg, Virginia, USA. This was done by running several simulations of a …