One of the significant problems facing water resource engineer is calculating coefficient roughness for subsequent design calculations discharge amount a channel or river. In this study, experiments were conducted in semi-circular, straight to investigate factors affecting bed and flow using Artificial Neural Network (ANN). For purpose, three semi-circular models with free overfall constructed ...

The main objective of this study was to analyze the flood propensity watercourse Ribeira Brava drainage basin and, if necessary, suggest two methodologies mitigate impacts, i.e., detention sizing and riverbed roughness coefficient adjustment. For assessment, geomorphological data obtained from watershed characterization process used through SIG ArcGIS software then for calculation expected peak...

the influence of surface roughness magnitude and direction on dry static friction coefficient between two similar steel samples has been studied through an experiment. a testing apparatus has been designed and fabricated to measure the friction coefficient for a few forms of surface asperity. according to the results of the experiments, dry friction coefficient is affected by both magnitude and...

Introduction: Estimations of peak discharge rates and durations of floods will play critical roles in discussions about megafloods and their relevance to the history of water on Earth and Mars. However, the movement of the floodwater is not easily modeled in an exact form because it strongly correlates to turbulent forces. In addition to that, actual floods progressively inundate complicated ro...

Abstract Using the Imperial College laboratory catchment facility data from 96 experiments on a slightly-roughened varnished strip catchment (1 m x 9.925 m) are used to investigate the performance of numerical models of overland flow based on the kinematic wave approximation. A simple four-parameter model incorporates the Darcy-Weisbach laminar flow and Manning turbulent flow friction relations...

This study’s primary goal was to conduct an analysis regarding the flood susceptibility of main watercourse São João (Funchal) drainage basin. In addition, if proven necessary, we also aimed suggest mitigation measures, such as sizing a detention basin and promoting adjustments riverbed’s roughness coefficient. study resorted geomorphological data—obtained during watershed characterization proc...

Roughness is the key parameter for surface runoff simulations. This study aims to determine robust Manning resistance coefficients (n) on basis of consecutive artificial rainfall experiments natural hillslopes available in literature, obtained at 22 different sites with degrees vegetation cover and type. The coefficient particularly important context two-dimensional (2D) hydraulic heavy Since t...