In this study, the CCHE2D model is used to analyse flow pattern in a meander reach of Gomati River. The finite volume method by numerical solve depth-averaged two-dimensional equations with

Debris flows are extremely rapid and unpredictable phenomena whose rheology is poorly understood. Moreover, human settlements often located in areas prone to debris flows. The combination of these features makes hazardous phenomena. Barriers usually installed flow paths mitigate risk. However, their design still based on empirical methods. In order base the barriers a more reliable approach, un...

Depth-averaged models, such as the Savage-Hutter model with Coulomb or Pouliquen friction laws, do not in some cases preserve physical threshold of motion. In particular, simulated granular mass can start to flow (or stay at rest) even if slope angle its free surface is lower higher) than repose material involved. The problem related hydrostatic pressure assumption, associated direction integra...

The sensitivity of oxygen depletion in turbid estuaries to parameters like freshwater discharge, depth, and sediment availability is investigated using an idealized model. The model describes tidally averaged circulation and suspended sediment concentration (SSC), which are input into an advection–diffusion sink module of dissolved oxygen (DO). Based on the analysis of field data collected in t...

Flow-like landslide is one of the most catastrophic types natural hazards due to its high velocity and long travel distance. In 2019, a large was triggered by heavy rainfall occurred in Shuicheng County, Guizhou, China. The characterized short slip time, speed, sliding distance, causing significant damages downstream communities properties. Depth-averaged models have been widely used predict ru...

A method of variational data assimilation (by means of an adjoint model) is used to improve the boundary conditions for a high resolution depth-averaged two dimensional non-linear hydrodynamic model of Morecambe Bay. The modelled region contains a large inter-tidal area and has an unusually high tidal range. The assimilation procedure is robust and effective in reducing model error. This system...