Articles | Volume 22, issue 9
https://doi.org/10.5194/nhess-22-3105-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-22-3105-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 Sep 2022
Research article |
| 26 Sep 2022
| 26 Sep 2022
Rare flood scenarios for a rapidly growing high-mountain city: Pokhara, Nepal
Melanie Fischer
CORRESPONDING AUTHOR
Institute of Environmental Science and Geography, University of
Potsdam, Potsdam, Germany
Jana Brettin
Institute of Environmental Science and Geography, University of
Potsdam, Potsdam, Germany
Sigrid Roessner
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
Ariane Walz
Institute of Environmental Science and Geography, University of
Potsdam, Potsdam, Germany
Monique Fort
Département de Géographie, Université Paris Cité,
Paris, France
Oliver Korup
Institute of Environmental Science and Geography, University of
Potsdam, Potsdam, Germany
Institute of Geosciences, University of Potsdam, Potsdam, Germany
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Bruno Merz, Günter Blöschl, Robert Jüpner, Heidi Kreibich, Kai Schröter, and Sergiy Vorogushyn
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Zhi Li, Hanqi Li, Zhibo Zhang, Chaomeng Dai, and Simin Jiang
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Samuel Jonson Sutanto, Matthijs Janssen, Mariana Madruga de Brito, and Maria del Pozo Garcia
Nat. Hazards Earth Syst. Sci., 24, 3703–3721, https://doi.org/10.5194/nhess-24-3703-2024, https://doi.org/10.5194/nhess-24-3703-2024, 2024
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Miroslav Spano and Jaromir Riha
Nat. Hazards Earth Syst. Sci., 24, 3683–3701, https://doi.org/10.5194/nhess-24-3683-2024, https://doi.org/10.5194/nhess-24-3683-2024, 2024
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The study examines the effects of hydrogeological hazard due to construction of the Skalička Dam near the Hranice Karst on groundwater discharges and water levels in the local karst formations downstream. A simplified pipe model was used to analyze the impact of two dam layouts: lateral and through-flow reservoirs. Results show that the through-flow scheme more significantly influences water levels and the discharge of mineral water, while the lateral layout has only negligible impact.
Rudolf Brázdil, Dominika Faturová, Monika Šulc Michalková, Jan Řehoř, Martin Caletka, and Pavel Zahradníček
Nat. Hazards Earth Syst. Sci., 24, 3663–3682, https://doi.org/10.5194/nhess-24-3663-2024, https://doi.org/10.5194/nhess-24-3663-2024, 2024
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Flash floods belong to natural hazards that can be enhanced in frequency, intensity, and impact during recent climate change. This paper presents a complex analysis of spatiotemporal variability and human impacts (including material damage and fatalities) of flash floods in the Czech Republic for the 2001–2023 period. The analysis generally shows no statistically significant trends in the characteristics analyzed.
Melissa Wood, Ivan D. Haigh, Quan Quan Le, Hung Nghia Nguyen, Hoang Ba Tran, Stephen E. Darby, Robert Marsh, Nikolaos Skliris, and Joël J.-M. Hirschi
Nat. Hazards Earth Syst. Sci., 24, 3627–3649, https://doi.org/10.5194/nhess-24-3627-2024, https://doi.org/10.5194/nhess-24-3627-2024, 2024
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We look at how compound flooding from the combination of river flooding and storm tides (storm surge and astronomical tide) may be changing over time due to climate change, with a case study of the Mekong River delta. We found that future compound flooding has the potential to flood the region more extensively and be longer lasting than compound floods today. This is useful to know because it means managers of deltas such as the Mekong can assess options for improving existing flood defences.
Maryam Pakdehi, Ebrahim Ahmadisharaf, Behzad Nazari, and Eunsaem Cho
Nat. Hazards Earth Syst. Sci., 24, 3537–3559, https://doi.org/10.5194/nhess-24-3537-2024, https://doi.org/10.5194/nhess-24-3537-2024, 2024
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Machine learning (ML) algorithms have increasingly received attention for modeling flood events. However, there are concerns about the transferability of these models (their capability in predicting out-of-sample and unseen events). Here, we show that ML models can be transferable for hindcasting maximum river flood depths across extreme events (four hurricanes) in a large coastal watershed (HUC6) when informed by the spatial distribution of pertinent features and underlying physical processes.
María Carmen Llasat, Montserrat Llasat-Botija, Erika Pardo, Raül Marcos-Matamoros, and Marc Lemus-Canovas
Nat. Hazards Earth Syst. Sci., 24, 3423–3443, https://doi.org/10.5194/nhess-24-3423-2024, https://doi.org/10.5194/nhess-24-3423-2024, 2024
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This paper shows the first public and systematic dataset of flood episodes referring to the entire Pyrenees massif, at municipal scale, named PIRAGUA_flood. Of the 181 flood events (1981–2015) that produced 154 fatalities, 36 were transnational, with the eastern part of the massif most affected. Dominant weather types show a southern component flow, with a talweg on the Iberian Peninsula and a depression in the vicinity. A positive and significant trend was found in Nouvelle-Aquitaine.
Ina Pohle, Sarah Zeilfelder, Johannes Birner, and Benjamin Creutzfeldt
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2024-187, https://doi.org/10.5194/nhess-2024-187, 2024
Revised manuscript accepted for NHESS
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Climate change, the lignite mining phase-out, and structural changes challenge Berlin's water resources management. The 2018–2023 drought uniquely impacted temperature, precipitation, groundwater, and surface water. Reduced water availability and rising demand are creating latent water quality problems. Addressing these challenges requires extensive measures in Berlin and its surrounding areas.
Colin M. Zarzycki, Benjamin D. Ascher, Alan M. Rhoades, and Rachel R. McCrary
Nat. Hazards Earth Syst. Sci., 24, 3315–3335, https://doi.org/10.5194/nhess-24-3315-2024, https://doi.org/10.5194/nhess-24-3315-2024, 2024
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We developed an automated workflow to detect rain-on-snow events, which cause flooding in the northeastern United States, in climate data. Analyzing the Susquehanna River basin, this technique identified known events affecting river flow. Comparing four gridded datasets revealed variations in event frequency and severity, driven by different snowmelt and runoff estimates. This highlights the need for accurate climate data in flood management and risk prediction for these compound extremes.
Dongyu Feng, Zeli Tan, Darren Engwirda, Jonathan D. Wolfe, Donghui Xu, Chang Liao, Gautam Bisht, James J. Benedict, Tian Zhou, Mithun Deb, Hong-Yi Li, and L. Ruby Leung
EGUsphere, https://doi.org/10.5194/egusphere-2024-2785, https://doi.org/10.5194/egusphere-2024-2785, 2024
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Our study explores how riverine and coastal flooding during hurricanes is influenced by the interaction of atmosphere, land, river and ocean conditions. Using an advanced Earth system model, we simulate Hurricane Irene to evaluate how meteorological and hydrological uncertainties affect flood modeling. Our findings reveal the importance of a multi-component modeling system, how hydrological conditions play critical roles in flood modeling, and greater flood risks if multiple factors are present.
Anne F. Van Loon, Sarra Kchouk, Alessia Matanó, Faranak Tootoonchi, Camila Alvarez-Garreton, Khalid E. A. Hassaballah, Minchao Wu, Marthe L. K. Wens, Anastasiya Shyrokaya, Elena Ridolfi, Riccardo Biella, Viorica Nagavciuc, Marlies H. Barendrecht, Ana Bastos, Louise Cavalcante, Franciska T. de Vries, Margaret Garcia, Johanna Mård, Ileen N. Streefkerk, Claudia Teutschbein, Roshanak Tootoonchi, Ruben Weesie, Valentin Aich, Juan P. Boisier, Giuliano Di Baldassarre, Yiheng Du, Mauricio Galleguillos, René Garreaud, Monica Ionita, Sina Khatami, Johanna K. L. Koehler, Charles H. Luce, Shreedhar Maskey, Heidi D. Mendoza, Moses N. Mwangi, Ilias G. Pechlivanidis, Germano G. Ribeiro Neto, Tirthankar Roy, Robert Stefanski, Patricia Trambauer, Elizabeth A. Koebele, Giulia Vico, and Micha Werner
Nat. Hazards Earth Syst. Sci., 24, 3173–3205, https://doi.org/10.5194/nhess-24-3173-2024, https://doi.org/10.5194/nhess-24-3173-2024, 2024
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Drought is a creeping phenomenon but is often still analysed and managed like an isolated event, without taking into account what happened before and after. Here, we review the literature and analyse five cases to discuss how droughts and their impacts develop over time. We find that the responses of hydrological, ecological, and social systems can be classified into four types and that the systems interact. We provide suggestions for further research and monitoring, modelling, and management.
Sheik Umar Jam-Jalloh, Jia Liu, Yicheng Wang, and Yuchen Liu
Nat. Hazards Earth Syst. Sci., 24, 3155–3172, https://doi.org/10.5194/nhess-24-3155-2024, https://doi.org/10.5194/nhess-24-3155-2024, 2024
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Our paper explores improving flood forecasting using advanced weather and hydrological models. By coupling the WRF model with WRF-Hydro and HEC-HMS, we achieved more accurate forecasts. WRF–WRF-Hydro excels for short, intense storms, while WRF–HEC-HMS is better for longer, evenly distributed storms. Our research shows how these models provide insights for adaptive atmospheric–hydrologic systems and aims to boost flood preparedness and response with more reliable, timely predictions.
Joshua Dorrington, Marta Wenta, Federico Grazzini, Linus Magnusson, Frederic Vitart, and Christian M. Grams
Nat. Hazards Earth Syst. Sci., 24, 2995–3012, https://doi.org/10.5194/nhess-24-2995-2024, https://doi.org/10.5194/nhess-24-2995-2024, 2024
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Extreme rainfall is the leading weather-related source of damages in Europe, but it is still difficult to predict on long timescales. A recent example of this was the devastating floods in the Italian region of Emiglia Romagna in May 2023. We present perspectives based on large-scale dynamical information that allows us to better understand and predict such events.
Alison L. Kay, Nick Dunstone, Gillian Kay, Victoria A. Bell, and Jamie Hannaford
Nat. Hazards Earth Syst. Sci., 24, 2953–2970, https://doi.org/10.5194/nhess-24-2953-2024, https://doi.org/10.5194/nhess-24-2953-2024, 2024
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Hydrological hazards affect people and ecosystems, but extremes are not fully understood due to limited observations. A large climate ensemble and simple hydrological model are used to assess unprecedented but plausible floods and droughts. The chain gives extreme flows outside the observed range: summer 2022 ~ 28 % lower and autumn 2023 ~ 42 % higher. Spatial dependence and temporal persistence are analysed. Planning for such events could help water supply resilience and flood risk management.
Fenglin Xu, Yong Liu, Guoqing Zhang, Ping Zhao, R. Iestyn Woolway, Yani Zhu, Jianting Ju, Tao Zhou, Xue Wang, and Wenfeng Chen
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2024-127, https://doi.org/10.5194/nhess-2024-127, 2024
Revised manuscript accepted for NHESS
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Glacial lake outbursts have been widely studied, but large inland lake outbursts have received less attention. Recently, with the rapid expansion of inland lakes, signs of potential outbursts have increased. However, the processes, causes, and mechanisms are still not well understood. Here, the outburst processes were investigated using a combination of field surveys, remote sensing mapping, and hydrodynamic modelling. The causes and mechanisms that triggered the two events were investigated.
Viet Dung Nguyen, Jeroen Aerts, Max Tesselaar, Wouter Botzen, Heidi Kreibich, Lorenzo Alfieri, and Bruno Merz
Nat. Hazards Earth Syst. Sci., 24, 2923–2937, https://doi.org/10.5194/nhess-24-2923-2024, https://doi.org/10.5194/nhess-24-2923-2024, 2024
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Our study explored how seasonal flood forecasts could enhance insurance premium accuracy. Insurers traditionally rely on historical data, yet climate fluctuations influence flood risk. We employed a method that predicts seasonal floods to adjust premiums accordingly. Our findings showed significant year-to-year variations in flood risk and premiums, underscoring the importance of adaptability. Despite limitations, this research aids insurers in preparing for evolving risks.
Shahin Khosh Bin Ghomash, Heiko Apel, and Daniel Caviedes-Voullième
Nat. Hazards Earth Syst. Sci., 24, 2857–2874, https://doi.org/10.5194/nhess-24-2857-2024, https://doi.org/10.5194/nhess-24-2857-2024, 2024
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Early warning is essential to minimise the impact of flash floods. We explore the use of highly detailed flood models to simulate the 2021 flood event in the lower Ahr valley (Germany). Using very high-resolution models resolving individual streets and buildings, we produce detailed, quantitative, and actionable information for early flood warning systems. Using state-of-the-art computational technology, these models can guarantee very fast forecasts which allow for sufficient time to respond.
Andrea Betterle and Peter Salamon
Nat. Hazards Earth Syst. Sci., 24, 2817–2836, https://doi.org/10.5194/nhess-24-2817-2024, https://doi.org/10.5194/nhess-24-2817-2024, 2024
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The study proposes a new framework, named FLEXTH, to estimate flood water depth and improve satellite-based flood monitoring using topographical data. FLEXTH is readily available as a computer code, offering a practical and scalable solution for estimating flood depth quickly and systematically over large areas. The methodology can reduce the impacts of floods and enhance emergency response efforts, particularly where resources are limited.
Shahin Khosh Bin Ghomash, Heiko Apel, Kai Schröter, and Max Steinhausen
Nat. Hazards Earth Syst. Sci. Discuss., https://doi.org/10.5194/nhess-2024-139, https://doi.org/10.5194/nhess-2024-139, 2024
Revised manuscript accepted for NHESS
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This work introduces RIM2D, a hydrodynamic model for precise and rapid flood predictions, ideal for early warning systems. We demonstrate RIM2D's ability to deliver detailed and localized flood forecasts using the June 2023 flood in Braunschweig, Germany, as a case study. This research highlights the readiness of RIM2D and the required hardware for integration into operational flood warning and impact-based forecasting systems.
Francisco Javier Gomez, Keighobad Jafarzadegan, Hamed Moftakhari, and Hamid Moradkhani
Nat. Hazards Earth Syst. Sci., 24, 2647–2665, https://doi.org/10.5194/nhess-24-2647-2024, https://doi.org/10.5194/nhess-24-2647-2024, 2024
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This study utilizes the global copula Bayesian model averaging technique for accurate and reliable flood modeling, especially in coastal regions. By integrating multiple precipitation datasets within this framework, we can effectively address sources of error in each dataset, leading to the generation of probabilistic flood maps. The creation of these probabilistic maps is essential for disaster preparedness and mitigation in densely populated areas susceptible to extreme weather events.
Manuel Grenier, Mathieu Boudreault, David A. Carozza, Jérémie Boudreault, and Sébastien Raymond
Nat. Hazards Earth Syst. Sci., 24, 2577–2595, https://doi.org/10.5194/nhess-24-2577-2024, https://doi.org/10.5194/nhess-24-2577-2024, 2024
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Modelling floods at the street level for large countries like Canada and the United States is difficult and very costly. However, many applications do not necessarily require that level of detail. As a result, we present a flood modelling framework built with artificial intelligence for socioeconomic studies like trend and scenarios analyses. We find for example that an increase of 10 % in average precipitation yields an increase in displaced population of 18 % in Canada and 14 % in the US.
Helge Bormann, Jenny Kebschull, Lidia Gaslikova, and Ralf Weisse
Nat. Hazards Earth Syst. Sci., 24, 2559–2576, https://doi.org/10.5194/nhess-24-2559-2024, https://doi.org/10.5194/nhess-24-2559-2024, 2024
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Inland flooding is threatening coastal lowlands. If rainfall and storm surges coincide, the risk of inland flooding increases. We examine how such compound events are influenced by climate change. Data analysis and model-based scenario analysis show that climate change induces an increasing frequency and intensity of compounding precipitation and storm tide events along the North Sea coast. Overload of inland drainage systems will also increase if no timely adaptation measures are taken.
Yanxia Shen, Zhenduo Zhu, Qi Zhou, and Chunbo Jiang
Nat. Hazards Earth Syst. Sci., 24, 2315–2330, https://doi.org/10.5194/nhess-24-2315-2024, https://doi.org/10.5194/nhess-24-2315-2024, 2024
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We present an improved Multigrid Dynamical Bidirectional Coupled hydrologic–hydrodynamic Model (IM-DBCM) with two major improvements: (1) automated non-uniform mesh generation based on the D-infinity algorithm was implemented to identify flood-prone areas where high-resolution inundation conditions are needed, and (2) ghost cells and bilinear interpolation were implemented to improve numerical accuracy in interpolating variables between the coarse and fine grids. The improved model was reliable.
Taylor Glen Johnson, Jorge Leandro, and Divine Kwaku Ahadzie
Nat. Hazards Earth Syst. Sci., 24, 2285–2302, https://doi.org/10.5194/nhess-24-2285-2024, https://doi.org/10.5194/nhess-24-2285-2024, 2024
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Reliance on infrastructure creates vulnerabilities to disruptions caused by natural hazards. To assess the impacts of natural hazards on the performance of infrastructure, we present a framework for quantifying resilience and develop a model of recovery based upon an application of project scheduling under resource constraints. The resilience framework and recovery model were applied in a case study to assess the resilience of building infrastructure to flooding hazards in Accra, Ghana.
Arnau Amengual, Romu Romero, María Carmen Llasat, Alejandro Hermoso, and Montserrat Llasat-Botija
Nat. Hazards Earth Syst. Sci., 24, 2215–2242, https://doi.org/10.5194/nhess-24-2215-2024, https://doi.org/10.5194/nhess-24-2215-2024, 2024
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On 22 October 2019, the Francolí River basin experienced a heavy precipitation event, resulting in a catastrophic flash flood. Few studies comprehensively address both the physical and human dimensions and their interrelations during extreme flash flooding. This research takes a step forward towards filling this gap in knowledge by examining the alignment among all these factors.
Paul Voit and Maik Heistermann
Nat. Hazards Earth Syst. Sci., 24, 2147–2164, https://doi.org/10.5194/nhess-24-2147-2024, https://doi.org/10.5194/nhess-24-2147-2024, 2024
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To identify flash flood potential in Germany, we shifted the most extreme rainfall events from the last 22 years systematically across Germany and simulated the consequent runoff reaction. Our results show that almost all areas in Germany have not seen the worst-case scenario of flood peaks within the last 22 years. With a slight spatial change of historical rainfall events, flood peaks of a factor of 2 or more would be achieved for most areas. The results can aid disaster risk management.
Günter Blöschl, Andreas Buttinger-Kreuzhuber, Daniel Cornel, Julia Eisl, Michael Hofer, Markus Hollaus, Zsolt Horváth, Jürgen Komma, Artem Konev, Juraj Parajka, Norbert Pfeifer, Andreas Reithofer, José Salinas, Peter Valent, Roman Výleta, Jürgen Waser, Michael H. Wimmer, and Heinz Stiefelmeyer
Nat. Hazards Earth Syst. Sci., 24, 2071–2091, https://doi.org/10.5194/nhess-24-2071-2024, https://doi.org/10.5194/nhess-24-2071-2024, 2024
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A methodology of regional flood hazard mapping is proposed, based on data in Austria, which combines automatic methods with manual interventions to maximise efficiency and to obtain estimation accuracy similar to that of local studies. Flood discharge records from 781 stations are used to estimate flood hazard patterns of a given return period at a resolution of 2 m over a total stream length of 38 000 km. The hazard maps are used for civil protection, risk awareness and insurance purposes.
Christoph Nathanael von Matt, Regula Muelchi, Lukas Gudmundsson, and Olivia Martius
Nat. Hazards Earth Syst. Sci., 24, 1975–2001, https://doi.org/10.5194/nhess-24-1975-2024, https://doi.org/10.5194/nhess-24-1975-2024, 2024
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The simultaneous occurrence of meteorological (precipitation), agricultural (soil moisture), and hydrological (streamflow) drought can lead to augmented impacts. By analysing drought indices derived from the newest climate scenarios for Switzerland (CH2018, Hydro-CH2018), we show that with climate change the concurrence of all drought types will increase in all studied regions of Switzerland. Our results stress the benefits of and need for both mitigation and adaptation measures at early stages.
Melody Gwyneth Whitehead and Mark Stephen Bebbington
Nat. Hazards Earth Syst. Sci., 24, 1929–1935, https://doi.org/10.5194/nhess-24-1929-2024, https://doi.org/10.5194/nhess-24-1929-2024, 2024
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Precipitation-driven hazards including floods, landslides, and lahars can be catastrophic and difficult to forecast due to high uncertainty around future weather patterns. This work presents a stochastic weather model that produces statistically similar (realistic) rainfall over long time periods at minimal computational cost. These data provide much-needed inputs for hazard simulations to support long-term, time and spatially varying risk assessments.
Jan Sodoge, Christian Kuhlicke, Miguel D. Mahecha, and Mariana Madruga de Brito
Nat. Hazards Earth Syst. Sci., 24, 1757–1777, https://doi.org/10.5194/nhess-24-1757-2024, https://doi.org/10.5194/nhess-24-1757-2024, 2024
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We delved into the socio-economic impacts of the 2018–2022 drought in Germany. We derived a dataset covering the impacts of droughts in Germany between 2000 and 2022 on sectors such as agriculture and forestry based on newspaper articles. Notably, our study illustrated that the longer drought had a wider reach and more varied effects. We show that dealing with longer droughts requires different plans compared to shorter ones, and it is crucial to be ready for the challenges they bring.
Mario Di Bacco, Daniela Molinari, and Anna Rita Scorzini
Nat. Hazards Earth Syst. Sci., 24, 1681–1696, https://doi.org/10.5194/nhess-24-1681-2024, https://doi.org/10.5194/nhess-24-1681-2024, 2024
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INSYDE 2.0 is a tool for modelling flood damage to residential buildings. By incorporating ultra-detailed survey and desk-based data, it improves the reliability and informativeness of damage assessments while addressing input data uncertainties.
Théo St. Pierre Ostrander, Thomé Kraus, Bruno Mazzorana, Johannes Holzner, Andrea Andreoli, Francesco Comiti, and Bernhard Gems
Nat. Hazards Earth Syst. Sci., 24, 1607–1634, https://doi.org/10.5194/nhess-24-1607-2024, https://doi.org/10.5194/nhess-24-1607-2024, 2024
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Mountain river confluences are hazardous during localized flooding events. A physical model was used to determine the dominant controls over mountain confluences. Contrary to lowland confluences, in mountain regions, the channel discharges and (to a lesser degree) the tributary sediment concentration control morphological patterns. Applying conclusions drawn from lowland confluences could misrepresent depositional and erosional patterns and the related flood hazard at mountain river confluences.
Nils Poncet, Philippe Lucas-Picher, Yves Tramblay, Guillaume Thirel, Humberto Vergara, Jonathan Gourley, and Antoinette Alias
Nat. Hazards Earth Syst. Sci., 24, 1163–1183, https://doi.org/10.5194/nhess-24-1163-2024, https://doi.org/10.5194/nhess-24-1163-2024, 2024
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High-resolution convection-permitting climate models (CPMs) are now available to better simulate rainstorm events leading to flash floods. In this study, two hydrological models are compared to simulate floods in a Mediterranean basin, showing a better ability of the CPM to reproduce flood peaks compared to coarser-resolution climate models. Future projections are also different, with a projected increase for the most severe floods and a potential decrease for the most frequent events.
Wilson C. H. Chan, Nigel W. Arnell, Geoff Darch, Katie Facer-Childs, Theodore G. Shepherd, and Maliko Tanguy
Nat. Hazards Earth Syst. Sci., 24, 1065–1078, https://doi.org/10.5194/nhess-24-1065-2024, https://doi.org/10.5194/nhess-24-1065-2024, 2024
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The most recent drought in the UK was declared in summer 2022. We pooled a large sample of plausible winters from seasonal hindcasts and grouped them into four clusters based on their atmospheric circulation configurations. Drought storylines representative of what the drought could have looked like if winter 2022/23 resembled each winter circulation storyline were created to explore counterfactuals of how bad the 2022 drought could have been over winter 2022/23 and beyond.
Dino Collalti, Nekeisha Spencer, and Eric Strobl
Nat. Hazards Earth Syst. Sci., 24, 873–890, https://doi.org/10.5194/nhess-24-873-2024, https://doi.org/10.5194/nhess-24-873-2024, 2024
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The risk of extreme rainfall events causing floods is likely increasing with climate change. Flash floods, which follow immediately after extreme rainfall, are particularly difficult to forecast and assess. We develop a decision rule for flash flood classification with data on all incidents between 2001 and 2018 in Jamaica with the statistical copula method. This decision rule tells us for any rainfall event of a certain duration how intense it has to be to likely trigger a flash flood.
Ivan Vorobevskii, Thi Thanh Luong, and Rico Kronenberg
Nat. Hazards Earth Syst. Sci., 24, 681–697, https://doi.org/10.5194/nhess-24-681-2024, https://doi.org/10.5194/nhess-24-681-2024, 2024
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This study presents a new version of a framework which allows us to model water balance components at any site on a local scale. Compared with the first version, the second incorporates new datasets used to set up and force the model. In particular, we highlight the ability of the framework to provide seasonal forecasts. This gives potential stakeholders (farmers, foresters, policymakers, etc.) the possibility to forecast, for example, soil moisture drought and thus apply the necessary measures.
Cited articles
Arcement Jr., G. J. and Schneider, V. R.: Guide for selecting Manning's
roughness coefficients for natural channels and flood plains: U.S.
Geological Survey Water Supply Paper 2339, US Department of Transportation,
Federal Highway Administration, https://doi.org/10.3133/wsp2339, 1984.
Basnet, K. and Acharya, D.: Flood Analysis at Ramghat, Pokhara, Nepal Using
HEC-RAS, Tech. J., 1, 41–53, https://doi.org/10.3126/tj.v1i1.27591, 2019.
Bolch, T., Shea, J. M., Liu, S., Azam, F. M., Gao, Y., Gruber, S.,
Immerzeel, W. W., Kulkarni, A., Li, H., Tahir, A. A., Zhang, G., and Zhang,
Y.: Status and Change of the Cryosphere in the Extended Hindu Kush Himalaya
Region BT – The Hindu Kush Himalaya Assessment: Mountains, Climate Change,
Sustainability and People, 1st edn., edited by: Wester, P., Mishra, A., Mukherji, A., and
Shrestha, A. B., 209–255, Springer International Publishing, Cham, https://doi.org/10.1007/978-3-319-92288-1_7,
2019.
Brunner, G. W.: HEC-RAS, River Analysis System – Hydraulic Reference Manual, 520, https://www.hec.usace.army.mil/software/hec-ras/documentation/HEC-RAS%205.0%20Reference%20Manual.pdf (last access: 16 September 2022), 2020a.
Brunner, G. W.: HEC-RAS River Analysis System – 2D Modeling User's Manual,
283, https://www.hec.usace.army.mil/confluence/rasdocs/r2dum/6.0 (last access: 16 September 2022), 2020b.
Carrivick, J. L.: Application of 2D hydrodynamic modelling to high-magnitude
outburst floods: An example from Kverkfjöll, Iceland, J. Hydrol.,
321, 187–199, https://doi.org/10.1016/j.jhydrol.2005.07.042, 2006.
Carrivick, J. L.: Modelling coupled hydraulics and sediment transport of a
high-magnitude flood and associated landscape change, Ann. Glaciol., 45,
143–154, https://doi.org/10.3189/172756407782282480, 2007.
Cenderelli, D. A. and Wohl, E. E.: Flow hydraulics and geomorphic effects of
glacial-lake outburst floods in the Mount Everest region, Nepal, Earth Surf.
Process. Landforms, 28, 385–407, https://doi.org/10.1002/esp.448, 2003.
Central Bureau of Statistics: National Population and Housing Census 2021,
Natl. Popul. Hous. Census 2021, https://cbs.gov.np/,
last access: 21 February 2022.
Cesca, M. and D'Agostino, V.: Comparison between FLO-2D and RAMMS in
debris-flow modelling: A case study in the Dolomites, WIT Trans. Eng. Sci.,
60, 197–206, https://doi.org/10.2495/DEB080201, 2008.
Chow, V. T.: Open-channel hydraulics, 1st edn., Civ. Eng. Ser., McGraw-Hill, New York, 680 pp., ISBN: 9780070859067, 1959.
Dahal, K. R., Sharma, S., and Sharma, C. M.: A Review of Riverbed Extraction
and its Effects on Aquatic Environment with Special Reference to Tinau
River, Nepal, Hydro Nepal J. Water Energy Environ., 11, 49–56,
https://doi.org/10.3126/hn.v11i0.7163, 2012.
ESRI and Maxar Technologies: World Imagery,
https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer, last access: 17 May 2022.
Fischer, M., Veh, G., and Korup, O.: Surface topography and roughness along
the Seti Khola (Pokhara Valley, Nepal) measured in-field in 2016 and 2019,
PANGAEA [data set], https://doi.org/10.1594/PANGAEA.941540, 2022.
Fort, M.: Sporadic morphogenesis in a continental subduction setting: an
example from the Annapurna Range, Nepal Himalaya, Zeitschrift für
Geomorphol. Suppl., 63, 9–36, 1987.
Fort, M.: The Pokhara Valley: A product of a natural catastrophe, in:
Geomorphological Landscapes of the World, edited by: Migon, P.,
Springer Science + Business Media B. V., 265–274, https://doi.org/10.1007/978-90-481-3055-9_27, 2010.
Fort, M.: Impact of climate change on mountain environment dynamics, Rev.
géographie Alp., 103, 1–7, https://doi.org/10.4000/rga.2877, 2015.
Fort, M., Adhikari, B. R., and Rimal, B.: Chapter 12 – Pokhara (Central
Nepal): A Dramatic Yet Geomorphologically Active Environment Versus a
Dynamic, Rapidly Developing City, in: Urban Geomorphology, edited by:
Thornbush, M. J. and Allen, C. D., Elsevier, Amsterdam, Oxford,
Cambridge, 231–258, https://doi.org/10.1016/B978-0-12-811951-8.00012-6, 2018.
Gabet, E. J., Burbank, D. W., Putkonen, J. K., Pratt-Sitaula, B. A., and
Ojha, T.: Rainfall thresholds for landsliding in the Himalayas of Nepal,
Geomorphology, 63, 131–143, https://doi.org/10.1016/j.geomorph.2004.03.011, 2004.
Grandin, R., Doin, M. P., Bollinger, L., Pinel-Puysségur, B., Ducret,
G., Jolivet, R., and Sapkota, S. N.: Long-term growth of the Himalaya
inferred from interseismic InSAR measurement, Geology, 40, 1059–1062,
https://doi.org/10.1130/G33154.1, 2012.
Grebby, S., Sowter, A., Gee, D., Athab, A., De la Barreda-Bautista, B.,
Girindran, R., and Marsh, S.: Remote monitoring of ground motion hazards in
high mountain terrain using InSAR: A case study of the Lake Sarez area,
Tajikistan, Appl. Sci., 11, 1–17, https://doi.org/10.3390/app11188738, 2021.
Gurung, D. R., Maharjan, S. B., Khanal, N. R., Joshi, G., and Murthy, M. S.
R.: Nepal disaster report 2015, Kathmandu, ISBN: 978-9937-0-0324-7, 2015.
Gurung, N., Fort, M., Bell, R., Arnaud-Fassetta, G., and Maharjan, N. R.:
Hydro-torrential hazard vs. anthropogenic activities along the Seti valley,
Kaski, Nepal: Assessment and recommendations from a risk perspective, J.
Nepal Geol. Soc., 62, 58–87, https://doi.org/10.3126/jngs.v62i0.38695, 2021.
Hanisch, J., Koirala, A., and Bhandary, N. P.: The Pokhara May 5th flood
disaster: a last warning sign sent by nature?, J. Nepal Geol. Soc., 46,
1–10, 2013.
Henzmann, I.: Local Peoples Risk Perception of Natural Hazards in the Seti
River Valley, Nepal, MS thesis, Department of Geography, University of Zurich, 2020.
Hermle, D., Keuschnig, M., Hartmeyer, I., Delleske, R., and Krautblatter, M.: Timely prediction potential of landslide early warning systems with multispectral remote sensing: a conceptual approach tested in the Sattelkar, Austria, Nat. Hazards Earth Syst. Sci., 21, 2753–2772, https://doi.org/10.5194/nhess-21-2753-2021, 2021.
Hock, R., Rasul, G., Adler, C., Cáceres, B., Gruber, S., Hirabayashi,
Y., Jackson, M., Kääb, A., Kang, S., Kutuzov, S., Milner, A., Molau,
U., Morin, S., Orlove, B., and Steltzer, H. I.: High Mountain Areas, in: IPCC
Special Report on the Ocean and Cryosphere in a Changing Climate, edited by:
Pörtner, H.-O., Roberts, D. C., Masson-Delmotte, V., Zhai, P., Tignor, M.,
Poloczanska, E., Mintenbeck, K., Alegría, A., Nicolai, M., Okem, A.,
Petzold, J., Rama, B., and Weyer, N. M., Genf, 131–202, https://doi.org/10.1017/9781009157964.004, 2019.
Hormann, K.: Die Terrassen an der Seti Khola – Ein Beitrag zur quartären
Morphogenese in Zentralnepal, Erdkunde, 28, 161–176, 1974.
Immerzeel, W. W., van Beek, L. P. H., and Bierkens, M. F. P.: Climate change
will affect the Asian water towers, Science, 328, 1382–1385,
https://doi.org/10.1126/science.1183188, 2010.
JAXA, NTT Data, and Remote Sensing Technology: AW3D Standard, https://www.aw3d.jp/en/products/standard/, JAXA [data set], last access: 16 September 2022.
Kargel, J. S., Paudel, L., Leonard, G., Regmi, D., Joshi, S., Poudel, K.,
Thapa, B., Watanabe, T., and Fort, M.: Causes and human impacts of the Seti
River (Nepal) disaster of 2012, in: Glacial Flooding & Disaster Risk
Management Knowledge Exchange and Field Training; High Mountains Adaptation
Partnership: Huaraz, Peru, 1–11, https://issuu.com/johnharlinmedia/docs/regmi_causes_humanimpactssetiriver_/1, (last access: 16 September 2022), 2013.
Kershaw, J. A., Clague, J. J., and Evans, S. G.: Geomorphic and
sedimentological signature of a two-phase outburst flood from moraine-dammed
Queen Bess Lake, British Columbia, Canada, Earth Surf. Process. Landforms,
30, 1–25, https://doi.org/10.1002/esp.1122, 2005.
Kirschbaum, D., Watson, C. S., Rounce, D. R., Shugar, D. H., Kargel, J. S.,
Haritashya, U. K., Amatya, P., Shean, D., Anderson, E. R., and Jo, M.: The
State of Remote Sensing Capabilities of Cascading Hazards Over High Mountain
Asia, Front. Earth Sci., 7, 1–25, https://doi.org/10.3389/feart.2019.00197, 2019.
Klimeš, J., Benešová, M., Vilímek, V., Bouška, P., and
Cochachin Rapre, A.: The reconstruction of a glacial lake outburst flood
using HEC-RAS and its significance for future hazard assessments: An example
from Lake 513 in the Cordillera Blanca, Peru, Nat. Hazards, 71,
1617–1638, https://doi.org/10.1007/s11069-013-0968-4, 2014.
Kondolf, G. M.: Geomorphic and environmental effects of instream gravel
mining, Landsc. Urban Plan., 28, 225–243,
https://doi.org/10.1016/0169-2046(94)90010-8, 1994.
Kraaijenbrink, P. D. A., Bierkens, M. F. P., Lutz, A. F., and Immerzeel, W.
W.: Impact of a global temperature rise of 1.5 degrees Celsius on Asia's
glaciers, Nature, 549, 257–260, https://doi.org/10.1038/nature23878, 2017.
Lovell, A. M., Carr, J. R., and Stokes, C. R.: Topographic controls on the
surging behaviour of Sabche Glacier, Nepal (1967 to 2017), Remote Sens.
Environ., 210, 434–443, https://doi.org/10.1016/j.rse.2018.03.036, 2018.
Mergili, M., Schneider, D., Worni, R., and Schneider, J. F.: Glacial lake
outburst floods in the Pamir of Tajikistan: Challenges in prediction and
modelling, Int. Conf. Debris-Flow Hazards Mitig. Mech. Predict. Assessment,
Proc., 973–982, https://doi.org/10.4408/IJEGE.2011-03.B-106, 2011.
Multi-Resolution Land Characteristics (MRLC) Consortium: National Land Cover
Database 2019 (NLCD2019) Legend, NLCD2019,
https://www.mrlc.gov/data/legends/national-land-cover-database-2019-nlcd2019-legend
(last access: 12 January 2022), 2019.
Nussbaumer, S., Schaub, Y., Huggel, C., and Walz, A.: Risk estimation for future glacier lake outburst floods based on local land-use changes, Nat. Hazards Earth Syst. Sci., 14, 1611–1624, https://doi.org/10.5194/nhess-14-1611-2014, 2014.
Oi, H., Higaki, D., Yagi, H., Usuki, N., and Yoshino, K.: Survey Report on
the Seti River Flood, Nepal (May 5, 2012), Sabo Frontier Foundation, Tokyo, https://www.sff.or.jp/nepal/osirase/121009Setikawagenchichousahoukokusho_English.ver.pdf (last access: 16 September 2022),
2012.
Oi, H., Higaki, D., Yagi, H., Usuki, N., and Yoshino, K.: Report of the
investigation of the flood disaster that occurred on May 5, 2012 along the
Seti River in Nepal, Int. J. Eros. Control Eng., 7, 111–117,
https://doi.org/10.13101/ijece.7.111, 2014.
OSMF: OpenStreetMap, OSMF [data set], https://www.openstreetmap.org, last access: 30 September 2021.
Pandey, V. K., Kumar, R., Singh, R., Kumar, R., Rai, S. C., Singh, R. P.,
Tripathi, A. K., Soni, V. K., Ali, S. N., Tamang, D., and Latief, S. U.:
Catastrophic ice-debris flow in the Rishiganga River, Chamoli, Uttarakhand
(India), Geomatics, Nat. Hazards Risk, 13, 289–309,
https://doi.org/10.1080/19475705.2021.2023661, 2022.
Petley, D.: Melamchi: a landslide dam break flood in Nepal last week,
Landslide Blog – AGU Blogosph.,
https://blogs.agu.org/landslideblog/2021/06/21/melamchi-a-landslide-dam-break-flood-in-nepal-last-week/, last access: 16 July 2021.
Planet Team: Planet Application Program Interface: In Space for Life on
Earth, https://www.planet.com/explorer (last access: 16 September 2022), 2017.
Quincey, D. J., Lucas, R. M., Richardson, S. D., Glasser, N. F., Hambrey, M.
J., and Reynolds, J. M.: Optical remote sensing techniques in high-mountain
environments: Application to glacial hazards, Prog. Phys. Geogr., 29,
475–505, https://doi.org/10.1191/0309133305pp456ra, 2005.
Rimal, B.: Urbanization and the Decline of Agricultural Land in Pokhara
Sub-metropolitan City, Nepal, J. Agric. Sci., 5, 54–65,
https://doi.org/10.5539/jas.v5n1p54, 2012.
Rimal, B., Baral, H., Stork, N., Paudyal, K., and Rijal, S.: Growing City and
Rapid Land Use Transition: Assessing Multiple Hazards and Risks in the
Pokhara Valley, Nepal, Land, 4, 957–978, https://doi.org/10.3390/land4040957, 2015.
Rimal, B., Zhang, L., Keshtkar, H., Sun, X., and Rijal, S.: Quantifying the
spatiotemporal pattern of urban expansion and hazard and risk area
identification in the Kaski District of Nepal, Land, 7, 1–22,
https://doi.org/10.3390/land7010037, 2018.
Ross, J. and Gilbert, R.: Lacustrine sedimentation in a monsoon environment:
The record from Phewa Tal, middle mountain region of Nepal, Geomorphology,
27, 307–323, https://doi.org/10.1016/S0169-555X(98)00079-8, 1999.
SANDRP: Explained: Seti River floods in May 2012, Nepal – A chain of events,
starting at 25,000 feet!,
https://sandrp.in/2014/01/26/explained-seti-river-floods-in-may-2012
(last access: 18 March 2021), 2014.
Schild, A.: ICIMOD's Position on Climate Change and Mountain Systems, Mt.
Res. Dev., 28, 328–331, https://doi.org/10.1659/mrd.mp009, 2008.
Schwanghart, W., Bernhardt, A., Stolle, A., Hoelzmann, P., Adhikari, B. R.,
Andermann, C., Tofelde, S., Merchel, S., Rugel, G., Fort, M., and Korup, O.:
Repeated catastrophic valley infill following medieval earthquakes in the
Nepal Himalaya, Science, 351, 147–150, https://doi.org/10.1126/science.aac9865,
2016.
Schwanghart, W., Ryan, M., and Korup, O.: Topographic and Seismic Constraints
on the Vulnerability of Himalayan Hydropower, Geophys. Res. Lett., 45,
8985–8992, https://doi.org/10.1029/2018GL079173, 2018.
Shrestha, A., Thapa, S., and Ghimire, B. N. S.: Flood Hazard Mapping and
Vulnerability Analysis Along Seti River in Pokhara Metropolitan City, Lect.
Notes Civ. Eng., 115, 183–190, https://doi.org/10.1007/978-981-15-9805-0_15, 2021.
Shugar, D. H., Jacquemart, M., Shean, D., Bhushan, S., Upadhyay, K., Sattar,
A., Schwanghart, W., McBride, S., de Vries, M. V. W., Mergili, M., Emmer,
A., Deschamps-Berger, C., McDonnell, M., Bhambri, R., Allen, S. K.,
Berthier, E., Carrivick, J. L., Clague, J. J., Dokukin, M., Dunning, S. A.,
Frey, H., Gascoin, S., Haritashya, U. K., Huggel, C., Kääb, A.,
Kargel, J. S., Kavanaugh, J. L., Lacroix, P., Petley, D., Rupper, S., Azam,
M. F., Cook, S. J., Dimri, A. P., Eriksson, M., Farinotti, D., Fiddes, J.,
Gnyawali, K. R., Harrison, S., Jha, M., Koppes, M., Kumar, A., Leinss, S.,
Majeed, U., Mal, S., Muhuri, A., Noetzli, J., Paul, F., Rashid, I., Sain,
K., Steiner, J., Ugalde, F., Watson, C. S., and Westoby, M. J.: A massive
rock and ice avalanche caused the 2021 disaster at Chamoli, Indian Himalaya,
Science, 373, 300–306, https://doi.org/10.1126/science.abh4455, 2021.
Sidle, R. C. and Ziegler, A. D.: The dilemma of mountain roads, Nat.
Geosci., 5, 437–438, https://doi.org/10.1038/ngeo1512, 2012.
Somos-Valenzuela, M. A., McKinney, D. C., Byers, A. C., Rounce, D. R., Portocarrero, C., and Lamsal, D.: Assessing downstream flood impacts due to a potential GLOF from Imja Tsho in Nepal, Hydrol. Earth Syst. Sci., 19, 1401–1412, https://doi.org/10.5194/hess-19-1401-2015, 2015.
Stolle, A.: Catastrophic Sediment Pulses in the Pokhara Valley, Nepal,
University of Potsdam, https://publishup.uni-potsdam.de/opus4-ubp/frontdoor/deliver/index/docId/41334/file/stolle_diss.pdf (last access: 16 September 2022), 2018.
Stolle, A., Bernhardt, A., Schwanghart, W., Hoelzmann, P., Adhikari, B. R.,
Fort, M., and Korup, O.: Catastrophic valley fills record large Himalayan
earthquakes, Pokhara, Nepal, Quat. Sci. Rev., 177, 88–103,
https://doi.org/10.1016/j.quascirev.2017.10.015, 2017.
Stolle, A., Schwanghart, W., Andermann, C., Bernhardt, A., Fort, M., Jansen,
J. D., Wittmann, H., Merchel, S., Rugel, G., Adhikari, B. R., and Korup, O.:
Protracted river response to medieval earthquakes, Earth Surf. Process.
Landforms, 44, 331–341, https://doi.org/10.1002/esp.4517, 2019.
Talchabhadel, R., Karki, R., Thapa, B. R., Maharjan, M., and Parajuli, B.:
Spatio-temporal variability of extreme precipitation in Nepal, Int. J.
Climatol., 38, 4296–4313, https://doi.org/10.1002/joc.5669, 2018.
Thapa, B., Watanabe, T., and Regmi, D.: Flood Assessment and Identification
of Emergency Evacuation Routes in Seti River Basin, Nepal, Land, 11,
1–33, https://doi.org/10.3390/land11010082, 2022.
UN Office for the Coordination of Humanitarian Affairs – Field Information
Services Section (OCHA FISS): Nepal – Subnational Administrative Boundaries,
Humanit. Data Exch.,
https://data.humdata.org/dataset/administrative-bounadries-of-nepal (last access: 5 January 2022), 2020.
United Nations Department of Economic and Social Affairs: World Population
Prospect 2019, World Population Prospect,
https://population.un.org/wpp/ (last access: 13 January 2022), 2019.
Vuichard, D. and Zimmermann, M.: The 1985 Catastrophic Drainage of a
Moraine-Dammed Lake, Khumbu Himal, Nepal: Cause and Consequences, Mt. Res.
Dev., 7, 91–110, https://doi.org/10.2307/3673305, 1987.
Wang, W., Gao, Y., Iribarren Anacona, P., Lei, Y., Xiang, Y., Zhang, G., Li,
S., and Lu, A.: Integrated hazard assessment of Cirenmaco glacial lake in
Zhangzangbo valley, Central Himalayas, Geomorphology, 306, 292–305,
https://doi.org/10.1016/j.geomorph.2015.08.013, 2018.
Westoby, M. J., Glasser, N. F., Brasington, J., Hambrey, M. J., Quincey, D.
J., and Reynolds, J. M.: Modelling outburst floods from moraine-dammed
glacial lakes, Earth-Sci. Rev., 134, 137–159,
https://doi.org/10.1016/j.earscirev.2014.03.009, 2014.
Wohl, E. E.: Uncertainty in Flood Estimates Associated with Roughness
Coefficient, J. Hydraul. Eng., 124, 219–223,
https://doi.org/10.1061/(asce)0733-9429(1998)124:2(219), 1998.
Zhang, T. and Wang, W.: Development of monitoring and early warning system
for Cirenmaco glacial lake in the central Himalayas, Int. J. Disaster Risk
Reduct., 73, 102914, https://doi.org/10.1016/j.ijdrr.2022.102914, 2022.
Zhang, X. and Liu, S.: A framework of numerical simulation on moraine-dammed
glacial lake outburst floods, J. Arid Land, 7, 728–740,
https://doi.org/10.1007/s40333-015-0133-x, 2015.
Zheng, G., Allen, S. K., Bao, A., Ballesteros-Cánovas, J. A., Huss, M.,
Zhang, G., Li, J., Yuan, Y., Jiang, L., Yu, T., Chen, W., and Stoffel, M.:
Increasing risk of glacial lake outburst floods from future Third Pole
deglaciation, Nat. Clim. Chang., 11, 411–417,
https://doi.org/10.1038/s41558-021-01028-3, 2021.
Short summary
Nepal’s second-largest city has been rapidly growing since the 1970s, although its valley has been affected by rare, catastrophic floods in recent and historic times. We analyse potential impacts of such floods on urban areas and infrastructure by modelling 10 physically plausible flood scenarios along Pokhara’s main river. We find that hydraulic effects would largely affect a number of squatter settlements, which have expanded rapidly towards the river by a factor of up to 20 since 2008.
Nepal’s second-largest city has been rapidly growing since the 1970s, although its valley has...
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