Performance assessment of 2D Zero-Inertia and Shallow Water models for simulating rainfall-runoff processes

Caviedes‐Voullième, Daniel; Fernández-Pato, Javier; Hinz, Christoph

doi:10.1016/j.jhydrol.2020.124663

Cited by 42 publications

(32 citation statements)

References 81 publications

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“…HEC-RAS provides two sets of equations to solve the shallow water flow in two dimensions (2D), the Saint Venant (SV) equations (or full momentum) and Diffusion Wave (DW) equations, which were used in this study. In comparison to Saint Venant, DW equations are more efficient and less prone to accuracy loss when simulating rainfall-runoff processes [54]. HEC-RAS 2D and DW equations have been successfully applied in many other flood assessment studies under various conditions, different flood sources, and a wide range of catchment sizes [7,55,56].…”

Section: Hydraulic Modelmentioning

confidence: 99%

Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments

Krvavica

Rubinić

2020

Water

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This study investigates and compares several design storms for flood estimation in partially urbanized catchments. Six different design storms were considered: Euler II, alternating block method, average variability method, Huff’s curves, and uniform rainfall. Additionally, two extreme historical storms were included for comparison. A small, ungauged, partially urbanized catchment in Novigrad (Croatia) was chosen as a study area to account for the infiltration impact on the rainfall-runoff process. The performance of each design storm was assessed based on the flood modeling results, namely the water depth, water velocity, flow rate, and overall flood extent. Furthermore, several rainfall durations were considered to identify a critical scenario. The excess rainfall was computed using the Soil Conservation Service’s Curve Number method, and two-dimensional flooding simulations were performed by the HEC-RAS model. The results confirmed that the choice of the design storm and the rainfall duration has a significant impact on the flood modeling results. Overall, design storms constructed only from IDF curves overestimated flooding in comparison to historical events, whereas design storms derived from the analysis of observed temporal patterns matched or slightly underestimated the flooding results. Of the six considered design storms, the average variability method showed the closest agreement with historical storms.

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Section: Hydraulic Modelmentioning

confidence: 99%

Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments

Krvavica

Rubinić

2020

Water

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“…Conversely, a model based on the complete version of the SWEs can be adopted in any situation and with a high degree of detail (provided that the domain geometry is sufficiently well known) [38]. As many authors state, in fact, strongly hyperbolic flows, such as those characterized by moving shock waves, cannot be accurately solved by applying the zero inertia approach [13,29,30,34,39].…”

Section: Introductionmentioning

confidence: 99%

A GPU-Accelerated Shallow-Water Scheme for Surface Runoff Simulations

Aureli

Prost

Vacondio

et al. 2020

Water

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The capability of a GPU-parallelized numerical scheme to perform accurate and fast simulations of surface runoff in watersheds, exploiting high-resolution digital elevation models (DEMs), was investigated. The numerical computations were carried out by using an explicit finite volume numerical scheme and adopting a recent type of grid called Block-Uniform Quadtree (BUQ), capable of exploiting the computational power of GPUs with negligible overhead. Moreover, stability and zero mass error were ensured, even in the presence of very shallow water depth, by introducing a proper reconstruction of conserved variables at cell interfaces, a specific formulation of the slope source term and an explicit discretization of the friction source term. The 2D shallow water model was tested against two different literature tests and a real event that recently occurred in Italy for which field data is available. The influence of the spatial resolution adopted in different portions of the domain was also investigated for the last test. The achieved low ratio of simulation to physical times, in some cases less than 1:20, opens new perspectives for flood management strategies. Based on the result of such models, emergency plans can be designed in order to achieve a significant reduction in the economic losses generated by flood events.

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“…Spatially distributed rainfall-runoff modeling can rely on the numerical solution of the shallow water equations-for example, [4,8,25]and is becoming popular in hydrological modeling [10]. Numerical solvers for the shallow water equations are currently robust, efficient, and parallelized, enabling to simulate catchment-scale problems at high resolutions [27].…”

Section: Introductionmentioning

confidence: 99%

Wavelet-based local mesh refinement for rainfall–runoff simulations

Özgen‐Xian

Kesserwani

Caviedes‐Voullième

et al. 2020

Journal of Hydroinformatics

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A wavelet-based local mesh refinement (wLMR) strategy is designed to generate multiresolution and unstructured triangular meshes from real digital elevation model (DEM) data for efficient hydrological simulations at the catchment scale. The wLMR strategy is studied considering slope- and curvature-based refinement criteria to analyze DEM inputs: the slope-based criterion uses bed elevation data as input to the wLMR strategy, whereas the curvature-based criterion feeds the bed slope data into it. The performance of the wLMR meshes generated by these two criteria is compared for hydrological simulations; first, using three analytical tests with the systematic variation in topography types and then by reproducing laboratory- and real-scale case studies. The bed elevation on the wLMR meshes and their simulation results are compared relative to those achieved on the finest uniform mesh. Analytical tests show that the slope- and curvature-based criteria are equally effective with the wLMR strategy, and that it is easier to decide which criterion to take in relation to the (regular) shape of the topography. For the realistic case studies: (i) slope analysis provides a better metric to assess the correlation of a wLMR mesh to the fine uniform mesh and (ii) both criteria predict outlet hydrographs with a close predictive accuracy to that on the uniform mesh, but the curvature-based criterion is found to slightly better capture the channeling patterns of real DEM data.

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Performance assessment of 2D Zero-Inertia and Shallow Water models for simulating rainfall-runoff processes

Cited by 42 publications

References 81 publications

Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments

Evaluation of Design Storms and Critical Rainfall Durations for Flood Prediction in Partially Urbanized Catchments

A GPU-Accelerated Shallow-Water Scheme for Surface Runoff Simulations

Wavelet-based local mesh refinement for rainfall–runoff simulations

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