nowadays, problems and barriers to supply adequate water and also environmental issues have caused wastewater treatment (wwt) to be considered a high priority. in light of high costs of wwt, using natural capacities to reduce pollution could be potentially significant. in this study, the impact of varying temperature and channel roughness have been investigated on the wastewater quality paramet...

An intelligent method based on adaptive neuro-fuzzy inference system (ANFIS) for identifying Manning’s roughness coefficients in modeling of alluvial river is presented. The procedure for selecting values of Manning n is subjective and requires judgment and skill which are developed primarily through experience. During practical applications, researchers often find that a correct choice of the ...

In this research a method to calibrate a river hydraulic model (HEC-RAS) using ground-based measurements of an observed flash flood is presented. Applications of the ground truth measurement of flood water depths and flooded areas within a reach of Neka River in Northern of Iran are discussed. The model is calibrated using the Manning's roughness coefficient based on 200-year flood event that t...

Flow conditions (flow discharge, flow depth, and velocity) in natural streams are mainly determined via the resistance formula such as Manning’s equation. Evaluating accurate roughness coefficient (n), especially rivers with bed form during floods, to obtain more reliable results has always been of interest scholars. The interaction between is very complex since control forms, vice versa. main ...

There is still little experience on the effect of Manning roughness coefficient in coupled hydrological-hydraulic distributed models based solution Shallow Water Equations (SWE), where affects not only channel flow basin hydrographic network but also rainfall-runoff processes hillslopes. In this kind model, takes role concentration time classic conceptual or aggregated modelling methods, as cas...