The recent requirements of Spanish regulations and directives, on their turn based European have led to the development a new two dimensional open channel flow modelling tool. tool, named Iber, combines hydrodynamic module, turbulence module sediment transport is in finite volume method solve involved equations. simulation code has been integrated pre-process post-process interface GiD software, developed by CIMNE. result system for rivers estuaries that uses advanced numerical schemes,...

Abstract This paper presents the decoupled hydrological discretization (DHD) scheme for solving shallow water equations in applications involving surface runoff rural and urban basins. The name of is motivated by fact that three which form two‐dimensional system are discretized independently from each other thus, numerical a mathematical sense. Its main advantages compared to classic finite volume schemes its simplicity code lower computational cost per time step. validation presented five...

The transport of wood material in rivers has been the subject various studies recent years. Most research focused on ecological and geomorphologic role wood, its recruitment processes spatial distribution streams. In this study, we dynamics, have developed a numerical model to simulate coupled with two-dimensional (2D) hydrodynamic model. For purpose, drag forces were incorporated as additional source terms into shallow water equations, which are solved together by using finite volume...

Abstract Inorganic sediment is not the only solid‐fraction component of river flows; flows may also carry significant amounts large organic material (i.e. wood), but characteristics these wood‐laden (WLFs) are well understood yet. With aim to shed light on relatively unexamined phenomena, we collected home videos showing natural with wood as main solid component. Analyses watersheds and streams where were recorded allowed us define for first time WLFs, describe broaden definition transport...

ABSTRACT Large woody material (LWM) transported by rivers may be entrapped at critical stream geometry configurations (e.g. bridges) and therefore dramatically increase the destructive power of floods. This was case in a Spanish mountain river where flood event with high degree LWM transport took place 1997. The aim this study to simulate bridge clogging process reconstruct wood deposit patterns, modelling individual pieces moving water flow interacting among them bridge. A two‐dimensional...

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 case unit hydrograph method. Three different approaches were used to adjust order fit results with...

Eco-hydraulic models are wide extended tools to assess physical habitat suitability on aquatic environments. Currently, the application of these is limited short river stretches and steady flow simulations. However, this limitation can be overcome with a high-performance computing technique: graphics processing unit (GPU) computing. R-Iber GPU-based hydrodynamic code parallelised in CUDA Fortran that, integration biological module, performs as an eco-hydraulic numerical tool. was validated...

Machine learning (ML) models have been shown to be valuable tools employed for streamflow prediction, reporting considerable accuracy and demonstrating their potential part of early warning systems mitigate flood impacts. However, one the main drawbacks these is low precision high values extrapolation, which are precisely ones related floods. Moreover, great majority evaluated considering all data equally relevant, regardless imbalanced nature records, where proportion small but most...

This study emphasizes the importance of accurate calibration in sediment transport models and highlights transformative role artificial intelligence (AI), specifically machine learning, improving accuracy computational efficiency. Extensive experiments were carried out Riba-Roja reservoir, which is located northeastern Iberian Peninsula. The accumulated volume (ASV) curve was used to calibrate these experiments. optimal ASV found be very close experimental data, with only minor differences...

This paper presents a new freeware simulation tool (IberWQ) for 2D water quality modelling in rivers and non-stratified estuaries. The model computes the spatial temporal evolution of several species variables which are relevant evaluation environmental status estuaries, including: Escherichia coli, dissolved oxygen, carbonaceous biochemical oxygen demand, organic nitrogen, ammoniacal nitrate–nitrite temperature salinity. A depth-averaged transport equation is solved each variable with mass...

Abstract Large wood promotes fundamental changes in river hydraulics and morphology, playing a relevant role ecology but also flood hazard. Accurate predictions of large dynamics terms deposition patterns travel distance are still lacking only recently have numerical models been developed to this end. In work we enhance the capabilities model Iber‐Wood reproducing shallow braided rivers validate it by comparing simulations with results previous laboratory experiments. The flume experiments...

At the present time there is a strong demand from policy makers for reliable predictions of effects climate and land use changes on inundation risk, in order to meet targets specified EU Water Framework Directive. Numerical models are valuable predictive tool support decision-making related implementation water flood risk management strategies. While decade ago one-dimensional modelling was most commonly used studies, at application two-dimensional river generalized. Combined with GIS tools,...

Excess surface water on roadways due to storm events can cause hazardous scenarios for traffic. The design of efficient road and transportation facility drainage systems is a major challenge. Different approaches limit excess be found in the standards different countries. This document presents method based hydraulic numerical simulation assessment grate inlet efficiency using Iber model. suitable application criteria according regulations presented facilitates sensitivity analyses...

Off-stream reservoirs are hydraulic structures that might cause severe flood damages in case of failure or improper operation. Their safety regulations usually require studies for hazard and inundation zone mapping. The selection the break point is not trivial because topography its surroundings commonly highly anthropic. A wrong would provide worst scenario terms maximum extent. This work presents a probabilistic approach based on stochastic definition along dyke. number scenarios generated...

This study presents a numerical investigation of the hydrodynamic and thermal interactions at confluence Ebro Segre Rivers in Riba-roja Reservoir, using Finite Element Method (FEM) within Kratos Multiphysics framework. The coupled Navier–Stokes energy equations were solved, employing variational multi-scale (VMS) method for stabilization. Field data from imaging situ measurements March October 2011 used model validation. results revealed complex mixing stratification dynamics influenced by...

Iber es una herramienta de simulación hidráulica bidimensional surgida desde la academia para dar solución a problemas ingeniería y ambiental. Desde su nacimiento en 2010 se ha convertido un software ampliamente aceptado simular procesos hidrodinámicos flujo lámina libre. Este trabajo presenta evolución analiza las mejoras llevadas cabo que actualmente permiten realizar simulaciones, completamente acopladas con hidrodinámica, transporte sedimentos calidad aguas, hidrológicos nivel cuenca...

Abstract Sediment relocation is a process where water turbulence moves deposits from shallower to deeper zones of lake or reservoir. Additionally, in the context reservoir cascade one possible sediment management strategies used maintain operational capacity reservoirs. Numerical modeling tools applied dynamics can help better understand sedimentary processes and enhance design strategies. This paper describes detailed analysis cohesive within methodology for calibration numerical models...

Abstract. This study aims at evaluating the performances of flash-flood forecasts issued from deterministic and ensemble meteorological prognostic systems. The hydrometeorological modeling chain includes Weather Research Forecasting Model (WRF) forcing rainfall-runoff model MARINE dedicated to flash floods. Two distinct prediction systems accounting for (i) perturbed initial lateral boundary conditions state (ii) mesoscale physical parameterizations have been implemented on Agly catchment...

A forecasting systems based on the coupling of meteorological, hydrologic, hydraulic and risk models is used to minimize risks associated water scarcity flooding. The fulfilment such complex chains can allow obtaining information most plausible scenarios management up 96 hours ahead. In present work, flood was carried out for different events in upper La Muga basin (including reservoir), within European project “Flood Risk Assessment Management Pyrenees” (http://pgriepm. eu/). main purpose...

Abstract A common technique for simulating non–Newtonian fluid dynamics, such as snow avalanches, is to solve the Shallow Water Equations (SWE), together with a rheological model describing momentum dissipation by shear stresses. Friction and cohesion terms are commonly modelled using Voellmy friction and, recently, Bartelt model. Here, an adaptation of Roe scheme that ensures balance between flux pressure gradients source term presented. An upwind was used discretisation SWE numerical...

This paper presents an analysis of the pressure field on steps a stepped spillway RCC dam. The fundamental component this study is series measurements obtained in fully-developed zone skimming flow regime along reduced-size model constructed at Department Hydraulic, Maritime and Environmental Engineering Laboratory Technical University Catalonia (UPC). A mathematical was fitted to profiles horizontal vertical faces steps. equation allows designers estimate possible negative values