Assessment of Flood Hazard Mapping Using a DEM-Based Approach and 2D Hydrodynamic Modeling DOI Open Access
Omayma Amellah, Paolo Mignosa, Federico Prost

et al.

Water, Journal Year: 2024, Volume and Issue: 16(13), P. 1844 - 1844

Published: June 28, 2024

DEM-based approaches for assessing flood-prone areas have recently gained extensive attention due to their parsimony and cost-effectiveness. This work aims test the capability of Geomorphic Flood Index (GFI) delineate results performances while downscaling calibration map. The accuracy was tested by examining sensitivity exponent power function linking flow depth in river network upslope contributing area. Two were selected: first consisted calibrating GFI using a flood map generated through 2D-SWE hydrodynamic model. second correlating water depths with corresponding areas. geomorphological model is able effectively susceptibility which, although on average larger than that obtained model, provide good starting point any subsequent in-depth analysis. After calibration, an Objective Function 0.21 Area Under ROC Curve AUC = 92%, which among highest if compared other cases literature, obtained. Positive feedback also covers only rather limited portion basin. However, small values scaling after method indicate substantial independence from leads belief simple not particularly suitable describing relationships between these two variables.

Language: Английский

Assessment of the influence of DTM quality on dam rupture simulation processes DOI Open Access
Marcelo Antônio Nero,

Vinícius Tavares Parreiras de Morais,

Marcos Antônio Timbó Elmiro

et al.

MOJ Ecology & Environmental Sciences, Journal Year: 2024, Volume and Issue: 9(2), P. 61 - 70

Published: April 5, 2024

Computer programs applied to disaster simulation are widely used and widespread today, taking as input various data types, from specific the application area DTMs (Digital Terrain Models). This need for and, in particular, related relief is very relevant prediction procedures forecasting catastrophes, such failure of tailings mining deposit dams. Therefore, it fundamental importance know quantify quality this question, order effectively serve application. To end, research, several tests were carried out, using a reference best results those obtained with introduction DTM LIDAR (Light Detection Ranging) flight survey, being one primary into HEC-RAS (Hydrologic Engineering Center-River Analysis System). Subsequently, these same had their spatial resolution degraded, that is, pixel size increased, generating models worse new inputs obtaining dam failures. The test B1 Dam, located Brumadinho-MG, Brazil, was laboratory, where biggest disasters world recently occurred which, there real affected by collapse. demonstrated use an at least 2.5 meters or better, class A cartographic compatible most recent Brazilian standard, would guarantee reliable results.

Language: Английский

Citations

5
Flood Mitigation and Water Resource Preservation: Hydrodynamic and SWMM Simulations of nature-based Solutions under Climate Change DOI
Maelaynayn El baida, Mimoun Chourak, Farid Boushaba

et al.

Water Resources Management, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 18, 2024

Language: Английский

Citations

5
Optimizing Hydraulic Performance and Sustainability of the Simike-Nzovwe Roadside Drainage System in Mbeya City, Tanzania Using HEC-RAS Modeling DOI
Abdul Rahman Mohamed,

Zacharia Katambara

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract The side drainage system along the TANZAM Highway section from Simike to Nzovwe River, extending approximately 1.85 km and featuring five circular culverts, was evaluated assess its hydraulic performance behaviour during rainfall events. Using HEC-RAS model, study analysed flow regimes, specific energy transitions, sediment transport identify design inefficiencies propose optimization strategies. model effectively captured key processes, revealing significant silt accumulation upstream of culverts due subcritical (Fr < 1) erosion risks in steeper sections with supercritical > 1). Hydraulic jumps observed near caused turbulence, localized erosion, debris deposition, velocities decreasing 7 m/s less than 1 transitions. Sensitivity analysis demonstrated that Manning’s roughness coefficient, channel slope, culvert dimensions significantly influence behaviour, accumulation, patterns. Based on these findings, recommends optimizing geometry by reducing slopes, steepening longitudinal enlarging enhance efficiency minimize deposition. Material selection, such as riprap for high-velocity zones vegetative linings low-velocity sections, is proposed improve resistance promote ecological stability. Additionally, traps sustainable practices are suggested mitigate sedimentation reduce maintenance demands. This highlights value one-dimensional models like designing maintaining efficient roadside systems, providing actionable recommendations performance, costs, ensure environmental sustainability similar contexts..

Language: Английский

Citations

0
Predicting possible bank erosion and bed incision in Zhengzhou Reach of Yellow River with hydrodynamic modeling DOI Creative Commons
Chaode Yan, Muhammad Waseem Boota, Shan‐e‐hyder Soomro

et al.

Journal of Water and Climate Change, Journal Year: 2024, Volume and Issue: 16(1), P. 92 - 111

Published: Oct. 24, 2024

ABSTRACT The Zhengzhou Reach of the Yellow River (YR) frequently undergoes significant channel changes during flooding, leading to bank erosion, deposition, and bed incision. These result in adverse impacts such as land loss, movement, overbank flooding. This study proposes a two-dimensional hydrodynamic model combined with rough set theory (RST) simulate these phenomena alluvial YR. was calibrated validated using data from 2006 2018. Results demonstrate that accurately predicts erosion incision, predicted widths closely matching measured data. mean error 14 m 18 most severe observed 78 downstream Huayuankou, river incised by 3.7–4.9 along right bank. Based on RST, shear stress, velocity, width/depth ratio, gradient, suspended sediment, load are dominating factors affect channel-shape changes. findings will aid implementing river-engineering strategies provide guidance for managing similar reaches. research highlights effectiveness coupled predicting morphological systems, thereby contributing better flood management protection strategies.

Language: Английский

Citations

3
Micro-macro–scale flood modeling in ungauged channels: Rain-on-grid approach for improving prediction accuracy with varied resolution datasets DOI
Akshay Kumar, Sagarika Biswas,

Srinivas Rallapalli

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132862 - 132862

Published: Feb. 1, 2025

Language: Английский

Citations

0
The Impact of a Clay-Core Embankment Dam Break on the Flood Wave Characteristics DOI Creative Commons
Cristina Sorana Ionescu, Daniela Elena Gogoaşe Nistoran,

Constantin Alexandru Baciu

et al.

Hydrology, Journal Year: 2025, Volume and Issue: 12(3), P. 56 - 56

Published: March 10, 2025

Flood hazard studies for dam break cases are of utmost importance understanding potential risks and minimizing the impact such accidents. Siriu Dam, which has a clay core, is ranked as third highest embankment in Romania. A fully dynamic 2D hydraulic numerical model was developed using HEC-RAS software to simulate routing flood waves formed by breaching this dam. Four different failure scenarios were considered: two overtopping piping. The breach parameters chosen based on characteristics accordance with appropriate empirical relationships. quantified analyzed terms depths, velocities, depth x velocity values, flooded areas. results provide useful information concerning risk mitigation, wave routing, peak discharges, arrival time, travel velocity, inundation boundary. influence scenario site (topography, river morphology, constructions) analyzed. Depths velocities over 10 m 15 m/s, respectively, obtained close dam, while those Buzău City (90 km away) under 1 2 respectively. city 7–8.5 h after (depending scenario), 50% its total area affected. Moreover, compared scenarios, providing practical details necessary develop management plans associated response measures inhabited This first study accident that can occur

Language: Английский

Citations

0
The Impact of Temporal Rainfall Pattern Uncertainties on Water Quantity and Sediment Transportation Results of an Integrated Flood Simulator DOI Creative Commons

Christos Ouzounis,

Vasilis Bellos

Water Resources Management, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

Citations

0
Comparing SWMM and HEC-RAS Hydrological Modeling Performance in Semi-Urbanized Watershed DOI Open Access

Michael A. Bragg,

Ashmita Poudel,

José G. Vasconcelos

et al.

Water, Journal Year: 2025, Volume and Issue: 17(9), P. 1331 - 1331

Published: April 29, 2025

One of the most common applications hydrological models is in studying urban watersheds, with distributed and semi-distributed being used more frequently. The choice modeling tools selection processes to represent dependent on objectives, available resources, scale study. Certain setup parameters can have important effects model accuracy, such as representation aquifer components, detailed surface storage, discretization, among others. these are often unknown since studies do not systematically alter nor consider different tools. This study performs a comparative analysis between SWMM HEC-RAS describing response semi-urbanized headwater watershed Alabama. Within each model, were varied accuracy assessed stream depth velocity collected field. results showed that impactful existence an component well careful storage. Conversely, comparable when was present, but runoff highly overpredicted infiltration considered. These indicate limitations rain-on-grid neglect interactions shallow groundwater.

Language: Английский

Citations

0
Enhancing flood forecasting accuracy in Data-Scarce regions through advanced modeling approaches DOI
Abdelmonaim Okacha, Adil Salhi,

Mounir Bouchouou

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 645, P. 132283 - 132283

Published: Nov. 10, 2024

Language: Английский

Citations

3
Assessment of Flood Hazard Mapping Using a DEM-Based Approach and 2D Hydrodynamic Modeling DOI Open Access
Omayma Amellah, Paolo Mignosa, Federico Prost

et al.

Water, Journal Year: 2024, Volume and Issue: 16(13), P. 1844 - 1844

Published: June 28, 2024

DEM-based approaches for assessing flood-prone areas have recently gained extensive attention due to their parsimony and cost-effectiveness. This work aims test the capability of Geomorphic Flood Index (GFI) delineate results performances while downscaling calibration map. The accuracy was tested by examining sensitivity exponent power function linking flow depth in river network upslope contributing area. Two were selected: first consisted calibrating GFI using a flood map generated through 2D-SWE hydrodynamic model. second correlating water depths with corresponding areas. geomorphological model is able effectively susceptibility which, although on average larger than that obtained model, provide good starting point any subsequent in-depth analysis. After calibration, an Objective Function 0.21 Area Under ROC Curve AUC = 92%, which among highest if compared other cases literature, obtained. Positive feedback also covers only rather limited portion basin. However, small values scaling after method indicate substantial independence from leads belief simple not particularly suitable describing relationships between these two variables.

Language: Английский

Citations

2