Article
Water Resources
Riccardo Bonomelli, Gabriele Farina, Marco Pilotti, Daniela Molinari, Francesco Ballio
Summary: This paper provides the first hydraulic reconstruction of the Gleno dam break and flood wave propagation in the Valle Camonica basin and Lake Iseo in the Italian pre-alpine and alpine region. The study offers insights into the flood propagation and presents a methodology for damage computation that considers the vulnerability of human life and the economic evaluation of damage to the built environment and agricultural activities. The findings suggest that the reduction of flood hazard through hydraulic works has led to an increase in expected damage in surrounding areas.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Multidisciplinary Sciences
Alarcon Matos de Oliveira, Jose Bueno Conti, Rosangela Leal Santos, Lusanira Nogueira Aragao de Oliveira, Carlos Alberto Oliveira Brito, Flavio Pietrobom Costa, Erivelton Nonato de Santana
Summary: This report estimated the loss of life and property and the variation of risk level in Sao Jose do Jacuipe, Brazil, caused by a simulated dam break. The study found that the city is exposed to time-dependent risk, and the absence of a warning system could result in significant casualties. However, the presence of a functioning warning system could greatly reduce the extent of destruction.
Article
Environmental Sciences
Christos Mattas, Dimitris Karpouzos, Pantazis Georgiou, Theodoros Tsapanos
Summary: This study examines the hypothetical failure of the Papadia dam in the Florina Regional Unit in northern Greece. It utilizes a numerical model to simulate the dam break process and assess the flood hazard. The results indicate that the flood could significantly impact agricultural activities in the area.
Article
Engineering, Multidisciplinary
Leghouchi Abdelghani
Summary: This study aims to predict the consequences of the flood wave caused by the failure of the Taksebt dam and propose an effective emergency action plan for risk mitigation. The hydrodynamic model HEC-RAS 2D was used to simulate the dam-break wave and estimate the downstream hydraulic characteristics. The geospatial analysis in GIS showed that many residential areas are at risk in the event of a dam break, and an emergency action plan was suggested to reduce casualties in the downstream area.
WORLD JOURNAL OF ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Hazem Eldeeb, Magdy H. Mowafy, Mohamed N. Salem, Ali Ibrahim
Summary: Despite improvements in design methodologies, dam failures still occur. Dam failure analysis is crucial for safety planning. This study modeled the break of the Grand Ethiopian Renaissance Dam (GERD) using the USACE Hydrologic Engineering Center's River Analysis System (HEC-RAS). Different failure scenarios were suggested, and outflow hydrographs and flood inundation maps were presented. It was concluded that in case of catastrophic failure, flow depths may vary from 3 to 10 m in residential areas, and the maximum flow would exceed the dam's total capacity. These findings can assist decision-makers in developing alternate plans to deal with the dangers of GERD break.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Geosciences, Multidisciplinary
Chongxun Mo, Yue Shen, Xingbi Lei, Huazhen Ban, Yuli Ruan, Shufeng Lai, Weiyan Cen, Zhenxiang Xing
Summary: This study simulates the evolution process of the dam-break flood in Chengbi River Reservoir under different breach conditions. The results include the peak discharge decay rates and water level decay rates for different breach scenarios. It is found that a 1-meter increase in bursting water level elevation leads to a 7% increase in peak flow, a 1-meter increase in the highest water level in front of the dam, and an average delay in peak time of 1.5 hours. The study also provides preliminary information on the extent of inundation in Baise City. These findings can serve as a basis for flood control and a reference for flood disaster management.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Environmental Sciences
Hazem M. Eldeeb, Ali Ibrahim, Magdy H. Mowafy, Martina Zelenakova, Hany F. Abd-Elhamid, Katarzyna Pietrucha-Urbanik, Mahmoud T. Ghonim
Summary: The study investigates the impact of the failure of the Grand Ethiopian Renaissance Dam (GERD) on downstream countries using HEC-RAS. Outflow hydrographs and flood inundation maps were provided through a hypothetical dam break scenario. The study finds that the breach outflow discharge increases with the breach dimension, while the peak discharge decreases with increasing breach formation time.
Article
Computer Science, Interdisciplinary Applications
Chongxun Mo, Weiyan Cen, Xingbi Lei, Huazhen Ban, Yuli Ruan, Shufeng Lai, Yue Shen, Zhenxiang Xing
Summary: When a reservoir is damaged, it brings destruction to people's lives and the regional economy. Flood simulation and risk assessment are effective ways to mitigate flood risk. This study introduces a new quantitative method for flood risk assessment, and proposes three schemes for flood simulation.
JOURNAL OF HYDROINFORMATICS
(2023)
Article
Environmental Sciences
Cagri Akgun, Salim Serkan Nas, Akin Uslu
Summary: Unlike river floods, floods caused by dam breaks occur more abruptly and with higher water velocities. This study used 2D and 3D numerical simulations to analyze the failure of Tuzluca Dam in Turkey. The analysis showed that significant floods would occur in downstream settlements, and the dam failure time and breach geometry had a significant impact on flood propagation and loss of life.
Article
Environmental Sciences
Andrei Urzica, Alin Mihu-Pintilie, Cristian Constantin Stoleriu, Catalin Ioan Cimpianu, Elena Hutanu, Claudiu Ionut Pricop, Adrian Grozavu
Summary: This study assessed the flood control capacity of the multi-reservoir system in Baseu River, northeastern Romania, using hydraulic modeling techniques. The results showed that the system plays an important role in flood mitigation.
Article
Engineering, Multidisciplinary
M. Garcia, A. Juan, J. Doss-Gollin, P. Bedient
Summary: This article introduces a novel approach of modularization by dividing the 2D domain into independent sub-domains to address the impact of changing spatial characteristics on hydrodynamic model outputs. The discrete and abstract modularization methods approximate the results from re-running the entire model, with a computational cost scaling linearly with model size. This trade-off between memory and computation may enable advancements in surrogate modeling or Monte Carlo flood risk assessment.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2023)
Article
Geosciences, Multidisciplinary
Hasan Ogulcan Marangoz, Tugce Anilan
Summary: This study applied a two-dimensional hydraulic routing model to simulate a dam break scenario in Turkey, predicting maximum flow depths of around 8 meters and potential impact on buildings in the downstream city center. The results demonstrate the effectiveness of these approaches in determining flood risk areas and preparing emergency action plans.
Article
Engineering, Environmental
Yasin Pasa, Ismail Bilal Peker, Abdülbaki Haci, Sezar Gulbaz
Summary: The aim of this study is to analyze the effects of a possible dam failure and generate a flood hazard map for two consecutive dams in a dense-residential region. The study focused on the Breach Formation Time and Number of Failed Buttresses of one dam, and the Reservoir Volume Ratio of the other dam. The results showed that these factors significantly affected flood peak depth, flow rate, velocity, and time to reach the peak. Estimated damage costs suggest that over 500 buildings will be affected in the worst-case scenario.
WATER SCIENCE AND TECHNOLOGY
(2023)
Review
Environmental Sciences
Jake G. Senior, Mark A. Trigg, Thomas Willis
Summary: The resources of small-scale community-based flood risk action groups are often limited, hence studies to model and predict the effects of Natural Flood Management are often restrained by time and lack of empirical data to validate results. As a result, representations of hillslope leaky barriers are largely modelled as several equifinal approaches, often without survey data. The geometrical characteristics of hillslope leaky barriers were surveyed for the first time at Hardcastle Crags, Calder Valley. This data informed six 2D hydraulic model representation scenarios with varying combinations of topography modification and roughness increase, allowing the sensitivity of their results to be tested. Results from Scenario 3 (topography modification and roughness increase) estimated total hillslope runoff peak flow to reduce by 16.6% in a 1:1-year design return period; however, this reduction diminished as rainfall intensity increased. Return periods of over 1:30 year estimated peak flow reductions of <5%. Only 14.3%-21.7% (98-148 m(3)) of the total additional storage provided by the barriers is mobilised during simulated events. A multi-peaked rainfall event from December 2015 was also simulated. Although the initial peak flow was reduced by 22.7%, as storage became mobilised, effectiveness reduced significantly for subsequent peaks within the same event.
JOURNAL OF FLOOD RISK MANAGEMENT
(2022)
Article
Construction & Building Technology
Manamno Beza, Amdeselassie Fikre, Alene Moshe, Valeria Vignali
Summary: This study focused on dam breach modeling and downstream flood inundation mapping. ArcGIS and HEC-RAS tools were used for model development, breach simulation, unsteady flood routing, and estimation of breach parameters, resulting in important hydrological data for flood analysis.
ADVANCES IN CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Andrea Maranzoni, Massimo Tomirotti
Summary: The study uses CFD to analyze the performance of oblique straight side weirs or two-segment single-cranked weirs inserted in rectangular converging channels, showing the impact of channel contraction rate on diversion efficiency. Results indicate that the concave arrangement is more efficient than the convex one.
JOURNAL OF HYDRAULIC RESEARCH
(2021)
Article
Engineering, Civil
Andrea Maranzoni
Summary: This paper presents a comprehensive analysis of possible flow profiles in non-prismatic trapezoidal channels using the method of singular points, considering bed slope and friction. Different cases are identified based on the occurrence of singular points along the collecting channel. The study verifies the types and quantities of singular points, as well as the non-monotonic nature of water depth profiles.
JOURNAL OF HYDRAULIC RESEARCH
(2021)
Article
Engineering, Environmental
Marco Pilotti, Laura Barone, Matteo Balistrocchi, Giulia Valerio, Luca Milanesi, Daniele Nizzoli
Summary: The study investigated the efficiency of sewage diversion and residual nutrient load in a sewer system on the east coast of a eutrophic Italian lake, revealing significant impacts of infiltration on overflow volume and the potential for non-structural practices to reduce sewer impacts.
Article
Environmental Sciences
Matteo Balistrocchi, Massimo Tomirotti, Alessandro Muraca, Roberto Ranzi
Summary: Extreme streamflow nonstationarity has received more attention than mean streamflow nonstationarity in assessing the impacts of climate change. However, a significant decrease in mean streamflow can lead to long-term freshwater scarcity, affecting the sustainability of water demand. Regional analyses are important for characterizing nonstationarity, and in this study, a marked decrease in runoff volumes was observed, potentially influenced by land cover transformations like woodland expansions.
Review
Environmental Sciences
Francesca Aureli, Andrea Maranzoni, Gabriella Petaccia
Summary: Mapping dam break inundation is crucial for risk management, emergency planning, and assessing potential consequences. While historical dam-break field data validation is helpful, it may be inaccurate and incomplete. Real-field data can still provide valuable test cases for numerical models validation.
Article
Engineering, Civil
Luca Milanesi, Marco Pilotti
Summary: This study introduces a method that combines structural vulnerability models and hydraulic simulations in flood events, demonstrated through a specific case study. After testing its capability to simulate flow fields in complex bathymetries, this method successfully applied to reconstruct the flood event in Corna di Darfo village in Northern Italy after the collapse of the Gleno dam.
JOURNAL OF HYDRAULIC ENGINEERING
(2021)
Article
Environmental Sciences
A. Maranzoni, M. D'Oria, M. Mazzoleni
Summary: This paper presents a probabilistic method for assessing residual flood hazard in flood-prone areas protected by levees. The method considers various sources of uncertainty and allows for the quantification of result confidence. Multiple levee breaches during the same flood event are taken into account. The method was applied to a region along the Po River in northern Italy, and the results highlight the importance of considering multiple breaching events in flood risk management.
WATER RESOURCES RESEARCH
(2022)
Article
Water Resources
Andrea Maranzoni, Massimo Tomirotti
Summary: This paper presents a new model of steep-slope shallow water equations, in which water depth is defined along the vertical direction and flow velocity is assumed parallel to the bottom surface. The mathematical properties of the new equations show that they are strictly hyperbolic for wet bed conditions and reduce to the conventional 2D SWE when bottom slopes are small.
ADVANCES IN WATER RESOURCES
(2022)
Review
Environmental Sciences
Andrea Maranzoni, Marco D'Oria, Carmine Rizzo
Summary: This article provides a systematic review of quantitative methods for flood hazard assessment and compares different flood hazard classification methods. It also discusses the future prospects and challenges in quantitative flood hazard analysis.
JOURNAL OF FLOOD RISK MANAGEMENT
(2023)
Article
Water Resources
Carmine Rizzo, Andrea Maranzoni, Marco D'Oria
Summary: A probabilistic method is proposed to quantitatively assess dam-break flood hazard, taking into account different breach widths and reservoir levels. This provides an appraisal of uncertainties in flood hazard indicators.
HYDROLOGICAL SCIENCES JOURNAL
(2023)
Review
Environmental Sciences
Francesca Aureli, Andrea Maranzoni, Gabriella Petaccia, Sandra Soares-Frazao
Summary: Laboratory experiments of dam-break flows are widely used to investigate geophysical flows involving flood waves. These experiments provide valuable data for validating numerical models and offer insights into the physics of the process. However, there is a lack of systematic reviews on laboratory investigations and existing datasets of dam-break flows.
Article
Water Resources
Andrea Maranzoni, Massimo Tomirotti
Summary: Numerical models based on the two-dimensional shallow water equations (SWE) are commonly used for flood hazard assessment, but they may not be suitable for areas with large terrain slopes. Steep-slope shallow water equations (SSSWE) are theoretically more suitable as they do not introduce the restrictive assumption of small bottom slopes. In this study, a new formulation of the 2D SSSWE is proposed, and it is validated against experimental data. The results show that the SSSWE are more accurate in describing dam-break flows over steep topographies and predict less severe flooding with slower wave propagation compared to the conventional SWE when bottom slopes are relatively large.
ADVANCES IN WATER RESOURCES
(2023)
Review
Environmental Sciences
Andrea Maranzoni, Massimo Tomirotti
Summary: This paper systematically reviews literature studies on three-dimensional hydrodynamic models for simulating large-scale dam-break flooding on irregular real-world topography. It analyzes governing equations, numerical methods, recent advances in numerical techniques, modelling accuracy, and computational efficiency. The paper highlights dam-break case studies for model validation and compares the advantages and limitations of three-dimensional dam-break models with commonly used two-dimensional depth-averaged models. The review aims to inform researchers and modellers interested in numerical modelling of dam-break flow on recent advances and developments in three-dimensional hydrodynamic models.
