Articles | Volume 18, issue 2
02 Mar 2018
Research article | 02 Mar 2018
Sediment traps with guiding channel and hybrid check dams improve controlled sediment retention
Sebastian Schwindt et al.
No articles found.
Patrick Ludwig, Florian Ehmele, Mário J. Franca, Susanna Mohr, Alberto Caldas-Alvarez, James E. Daniell, Uwe Ehret, Hendrik Feldmann, Marie Hundhausen, Peter Knippertz, Katharina Küpfer, Michael Kunz, Bernhard Mühr, Joaquim G. Pinto, Julian Quinting, Andreas M. Schäfer, Frank Seidel, and Christina Wisotzky
Nat. Hazards Earth Syst. Sci. Discuss.,
Preprint under review for NHESSShort summary
Heavy precipitation in July 2021 led to widespread floods in western Germany and neighboring countries. The event was among the five heaviest precipitation events of the past 70 years in Germany and the river discharges exceeded by far the statistical 100-year return values. Simulations of the event under future climate conditions revealed a strong and non-linear effect on flood peaks: For +2 K global warming, an 18 % increase in rainfall led to a 39 % increase of the flood peak in the Ahr river.
Susanna Mohr, Uwe Ehret, Michael Kunz, Patrick Ludwig, Alberto Caldas-Alvarez, James E. Daniell, Florian Ehmele, Hendrik Feldmann, Mário J. Franca, Christian Gattke, Marie Hundhausen, Peter Knippertz, Katharina Küpfer, Bernhard Mühr, Joaquim G. Pinto, Julian Quinting, Andreas M. Schäfer, Marc Scheibel, Frank Seidel, and Christina Wisotzky
Nat. Hazards Earth Syst. Sci. Discuss.,
Preprint under review for NHESSShort summary
The flood event in July 2021 was one of the most severe natural disasters in Europe in the last half century. The objective of this two-part study is a multi-disciplinary assessment that examine the complex process interactions in different compartments, from meteorology to hydrological conditions to hydro-morphological processes to impacts on assets and environment. While Part 1 focuses on the description of the event, the second part puts the event in historical and climate change contexts.
Jessica Zordan, Anton J. Schleiss, and Mário J. Franca
Earth Surf. Dynam., 7, 377–391,Short summary
The effect of buoyancy and bottom slope on the runout and entrainment capacity of experimentally reproduced saline gravity currents is studied. The shape of the current is modified due to the entrainment of ambient water, particularly within the body region. For steep slopes, two opposite mechanisms of mass exchange are identified: the current entrainment of water from the upper surface due to the enhanced friction at the interface and the head feeding by a rear-fed current.
Oriane Etter, Frédéric Jordan, and Anton J. Schleiss
Hydrol. Earth Syst. Sci. Discuss.,
F. Zeimetz, J. García-Hernández, and A. J. Schleiss
Proc. IAHS, 370, 147–152,
Related subject area
Hydrological HazardsBrief communication: Impact forecasting could substantially improve the emergency management of deadly floods: case study July 2021 floods in GermanyBrief communication: Western Europe flood in 2021 – mapping agriculture flood exposure from synthetic aperture radar (SAR)Comprehensive space–time hydrometeorological simulations for estimating very rare floods at multiple sites in a large river basinA new index to quantify the extremeness of precipitation across scalesEffectiveness of Sentinel-1 and Sentinel-2 for flood detection assessment in EuropeAssessing flood hazard changes using climate model forcingCharacterizing multivariate coastal flooding events in a semi-arid region: the implications of copula choice, sampling, and infrastructureDifferent drought types and the spatial variability in their hazard, impact, and propagation characteristicsMore than heavy rain turning into fast-flowing water – a landscape perspective on the 2021 Eifel floodsIntegrated drought risk assessment to support adaptive policymaking in the NetherlandsINSYDE-BE: adaptation of the INSYDE model to the Walloon region (Belgium)Assessing flooding impact to riverine bridges: an integrated analysisWarming of 0.5 °C may cause double the economic loss and increase the population affected by floods in ChinaFirst application of the Integrated Karst Aquifer Vulnerability (IKAV) method – potential and actual vulnerability in Yucatán, MexicoBrief communication: Seismological analysis of flood dynamics and hydrologically triggered earthquake swarms associated with Storm AlexSystem vulnerability to flood events and risk assessment of railway systems based on national and river basin scales in ChinaMachine-learning blends of geomorphic descriptors: value and limitations for flood hazard assessment across large floodplainsA performance-based approach to quantify atmospheric river flood riskEstimating soil moisture conditions for drought monitoring with random forests and a simple soil moisture accounting schemeExtreme-coastal-water-level estimation and projection: a comparison of statistical methodsSpatiotemporal evolution and meteorological triggering conditions of hydrological drought in the Hun River basin, NE ChinaThe Cambodian Mekong floodplain under future development plans and climate changeGeo-historical database of flood impacts in Alpine catchments (HIFAVa database, Arve River, France, 1850–2015)Compound flood modeling framework for surface–subsurface water interactionsOutburst flood scenarios and risks for a rapidly growing high-mountain city: Pokhara, NepalAssessing tropical cyclone compound flood risk using hydrodynamic modelling: a case study in Haikou City, ChinaAn approach to identify the best climate models for the assessment of climate change impacts on meteorological and hydrological droughtsFlash flood warnings in context: combining local knowledge and large-scale hydro-meteorological patternsA comparative flood damage and risk impact assessment of land use changesTemporal changes in rainfall intensity–duration thresholds for post-wildfire flash floods in southern CaliforniaCompound inland flood events: different pathways, different impacts and different coping optionsReview article: Factors leading to the occurrence of flood fatalities: a systematic review of research papers published between 2010 and 2020Modeling of a compound flood induced by the levee breach at Qianbujing Creek, Shanghai, during Typhoon FitowImproving flood damage assessments in data-scarce areas by retrieval of building characteristics through UAV image segmentation and machine learning – a case study of the 2019 floods in southern MalawiAssessment of direct economic losses of flood disasters based on spatial valuation of land use and quantification of vulnerabilities: a case study on the 2014 flood in Lishui city of ChinaEvaluating integrated water management strategies to inform hydrological drought mitigationGlobal riverine flood risk – how do hydrogeomorphic floodplain maps compare to flood hazard maps?Global flood exposure from different sized riversA paradigm of extreme rainfall pluvial floods in complex urban areas: the flood event of 15 July 2020 in Palermo (Italy)Space-time clustering of climate extremes amplify global climate impacts, leading to fat-tailed riskLeveraging multi-model season-ahead streamflow forecasts to trigger advanced flood preparedness in PeruAssessment of centennial (1918–2019) drought features in the Campania region by historical in situ measurements (southern Italy)Selecting and analysing climate change adaptation measures at six research sites across EuropeAssessing local impacts of the 1700 CE Cascadia earthquake and tsunami using tree-ring growth histories: a case study in South Beach, Oregon, USAAssessing climate-change-induced flood risk in the Conasauga River watershed: an application of ensemble hydrodynamic inundation modelingIntegrated mapping of water-related disasters using the analytical hierarchy process under land use change and climate change issues in LaosSoil moisture and streamflow deficit anomaly index: an approach to quantify drought hazards by combining deficit and anomalyThe uncertainty of flood frequency analyses in hydrodynamic model simulationsFlood risk assessment of the European road networkThe impact of hydrological model structure on the simulation of extreme runoff events
Heiko Apel, Sergiy Vorogushyn, and Bruno Merz
Nat. Hazards Earth Syst. Sci., 22, 3005–3014,Short summary
The paper presents a fast 2D hydraulic simulation model for flood propagation that enables operational forecasts of spatially distributed inundation depths, flood extent, flow velocities, and other flood impacts. The detailed spatial forecast of floods and flood impacts is a large step forward from the currently operational forecasts of discharges at selected gauges, thus enabling a more targeted flood management and early warning.
Kang He, Qing Yang, Xinyi Shen, and Emmanouil N. Anagnostou
Nat. Hazards Earth Syst. Sci., 22, 2921–2927,Short summary
This study depicts the flood-affected areas in western Europe in July 2021 and particularly the agriculture land that was under flood inundation. The results indicate that the total inundated area over western Europe is about 1920 km2, of which 1320 km2 is in France. Around 64 % of the inundated area is agricultural land. We expect that the agricultural productivity in western Europe will have been severely impacted.
Daniel Viviroli, Anna E. Sikorska-Senoner, Guillaume Evin, Maria Staudinger, Martina Kauzlaric, Jérémy Chardon, Anne-Catherine Favre, Benoit Hingray, Gilles Nicolet, Damien Raynaud, Jan Seibert, Rolf Weingartner, and Calvin Whealton
Nat. Hazards Earth Syst. Sci., 22, 2891–2920,Short summary
Estimating the magnitude of rare to very rare floods is a challenging task due to a lack of sufficiently long observations. The challenge is even greater in large river basins, where precipitation patterns and amounts differ considerably between individual events and floods from different parts of the basin coincide. We show that a hydrometeorological model chain can provide plausible estimates in this setting and can thus inform flood risk and safety assessments for critical infrastructure.
Paul Voit and Maik Heistermann
Nat. Hazards Earth Syst. Sci., 22, 2791–2805,Short summary
To better understand how the frequency and intensity of heavy precipitation events (HPEs) will change with changing climate and to adapt disaster risk management accordingly, we have to quantify the extremeness of HPEs in a reliable way. We introduce the xWEI (cross-scale WEI) and show that this index can reveal important characteristics of HPEs that would otherwise remain hidden. We conclude that the xWEI could be a valuable instrument in both disaster risk management and research.
Angelica Tarpanelli, Alessandro C. Mondini, and Stefania Camici
Nat. Hazards Earth Syst. Sci., 22, 2473–2489,Short summary
We analysed 10 years of river discharge data from almost 2000 sites in Europe, and we extracted flood events, as proxies of flood inundations, based on the overpasses of Sentinel-1 and Sentinel-2 satellites to derive the percentage of potential inundation events that they were able to observe. Results show that on average 58 % of flood events are potentially observable by Sentinel-1 and only 28 % by Sentinel-2 due to the obstacle of cloud coverage.
David P. Callaghan and Michael G. Hughes
Nat. Hazards Earth Syst. Sci., 22, 2459–2472,Short summary
A new method was developed to estimate changes in flood hazard under climate change. We use climate projections covering New South Wales, Australia, with two emission paths of business as usual and one with reduced emissions. We apply our method to the lower floodplain of the Gwydir Valley with changes in flood hazard provided over the next 90 years compared with the previous 50 years. We find that changes in flood hazard decrease over time within the Gwydir Valley floodplain.
Joseph T. D. Lucey and Timu W. Gallien
Nat. Hazards Earth Syst. Sci., 22, 2145–2167,Short summary
Coastal flooding can result from multiple flood drivers (e.g., tides, waves, river flows, rainfall) occurring at the same time. This study characterizes flooding events caused by high marine water levels and rain. Results show that wet-season coinciding sampling may better describe extreme flooding events in a dry, tidally dominated region. A joint-probability-based function is then used to estimate sea wall impacts on urban coastal flooding.
Erik Tijdeman, Veit Blauhut, Michael Stoelzle, Lucas Menzel, and Kerstin Stahl
Nat. Hazards Earth Syst. Sci., 22, 2099–2116,Short summary
We identified different drought types with typical hazard and impact characteristics. The summer drought type with compounding heat was most impactful. Regional drought propagation of this drought type exhibited typical characteristics that can guide drought management. However, we also found a large spatial variability that caused distinct differences among propagating drought signals. Accordingly, local multivariate drought information was needed to explain the full range of drought impacts.
Michael Dietze, Rainer Bell, Ugur Ozturk, Kristen L. Cook, Christoff Andermann, Alexander R. Beer, Bodo Damm, Ana Lucia, Felix S. Fauer, Katrin M. Nissen, Tobias Sieg, and Annegret H. Thieken
Nat. Hazards Earth Syst. Sci., 22, 1845–1856,Short summary
The flood that hit Europe in July 2021, specifically the Eifel, Germany, was more than a lot of fast-flowing water. The heavy rain that fell during the 3 d before also caused the slope to fail, recruited tree trunks that clogged bridges, and routed debris across the landscape. Especially in the upper parts of the catchments the flood was able to gain momentum. Here, we discuss how different landscape elements interacted and highlight the challenges of holistic future flood anticipation.
Marjolein J. P. Mens, Gigi van Rhee, Femke Schasfoort, and Neeltje Kielen
Nat. Hazards Earth Syst. Sci., 22, 1763–1776,Short summary
Many countries have to prepare for droughts by proposing policy actions to increase water supply, reduce water demand, or limit the societal impact. Societal cost–benefit analysis is required to support decision-making for a range of future scenarios, accounting for climate change and socio-economic developments. This paper presents a framework to assess drought policy actions based on quantification of drought risk and exemplifies it for the Netherlands’ drought risk management strategy.
Anna Rita Scorzini, Benjamin Dewals, Daniela Rodriguez Castro, Pierre Archambeau, and Daniela Molinari
Nat. Hazards Earth Syst. Sci., 22, 1743–1761,Short summary
This study presents a replicable procedure for the adaptation of synthetic, multi-variable flood damage models among countries that may have different hazard and vulnerability features. The procedure is exemplified here for the case of adaptation to the Belgian context of a flood damage model, INSYDE, for the residential sector, originally developed for Italy. The study describes necessary changes in model assumptions and input parameters to properly represent the new context of implementation.
Maria Pregnolato, Andrew O. Winter, Dakota Mascarenas, Andrew D. Sen, Paul Bates, and Michael R. Motley
Nat. Hazards Earth Syst. Sci., 22, 1559–1576,Short summary
The interaction of flow, structure and network is complex, and yet to be fully understood. This study aims to establish rigorous practices of computational fluid dynamics (CFD) for modelling hydrodynamic forces on inundated bridges, and understanding the consequences of such impacts on the surrounding network. The objectives of this study are to model hydrodynamic forces as the demand on the bridge structure, to advance a structural reliability and network-level analysis.
Lulu Liu, Jiangbo Gao, and Shaohong Wu
Nat. Hazards Earth Syst. Sci., 22, 1577–1590,Short summary
The impact of extreme events is increasing with global warming. Based on future scenario data and an improved quantitative assessment model of natural-disaster risk, this study analyses the spatial and temporal patterns of floods in China at 1.5 °C and 2 °C of global warming, quantitatively assesses the socioeconomic risks posed by floods, and determines the integrated risk levels. Global warming of 1.5 °C can effectively reduce the population affected and the economic risks of floods.
Miguel Moreno-Gómez, Carolina Martínez-Salvador, Rudolf Liedl, Catalin Stefan, and Julia Pacheco
Nat. Hazards Earth Syst. Sci., 22, 1591–1608,Short summary
Current vulnerability methods, as tools to protect groundwater resources from pollution, present some limitations and drawbacks: the roles of population and economic activities are not considered by such methods. The methodology presented in this work combines natural characteristics and human-driven conditions of a given region to improve the process of groundwater vulnerability analysis. Results indicate the reliability of this alternative method to improve groundwater protection strategies.
Małgorzata Chmiel, Maxime Godano, Marco Piantini, Pierre Brigode, Florent Gimbert, Maarten Bakker, Françoise Courboulex, Jean-Paul Ampuero, Diane Rivet, Anthony Sladen, David Ambrois, and Margot Chapuis
Nat. Hazards Earth Syst. Sci., 22, 1541–1558,Short summary
On 2 October 2020, the French Maritime Alps were struck by an extreme rainfall event caused by Storm Alex. Here, we show that seismic data provide the timing and velocity of the propagation of flash-flood waves along the Vésubie River. We also detect 114 small local earthquakes triggered by the rainwater weight and/or its infiltration into the ground. This study paves the way for future works that can reveal further details of the impact of Storm Alex on the Earth’s surface and subsurface.
Weihua Zhu, Kai Liu, Ming Wang, Philip J. Ward, and Elco E. Koks
Nat. Hazards Earth Syst. Sci., 22, 1519–1540,Short summary
We present a simulation framework to analyse the system vulnerability and risk of the Chinese railway system to floods. To do so, we develop a method for generating flood events at both the national and river basin scale. Results show flood system vulnerability and risk of the railway system are spatially heterogeneous. The event-based approach shows how we can identify critical hotspots, taking the first steps in developing climate-resilient infrastructure.
Andrea Magnini, Michele Lombardi, Simone Persiano, Antonio Tirri, Francesco Lo Conti, and Attilio Castellarin
Nat. Hazards Earth Syst. Sci., 22, 1469–1486,Short summary
We retrieve descriptors of the terrain morphology from a digital elevation model of a 105 km2 study area and blend them through decision tree models to map flood susceptibility and expected water depth. We investigate this approach with particular attention to (a) the comparison with a selected single-descriptor approach, (b) the goodness of decision trees, and (c) the performance of these models when applied to data-scarce regions. We find promising pathways for future research.
Corinne Bowers, Katherine A. Serafin, and Jack Baker
Nat. Hazards Earth Syst. Sci., 22, 1371–1393,Short summary
Atmospheric rivers (ARs) cause significant flooding on the US west coast. We present a new Performance-based Atmospheric River Risk Analysis (PARRA) framework that connects models of atmospheric forcings, hydrologic impacts, and economic consequences to better estimate losses from AR-induced river flooding. We apply the PARRA framework to a case study in Sonoma County, CA, USA, and show that the framework can quantify the potential benefit of flood mitigation actions such as home elevation.
Yves Tramblay and Pere Quintana Seguí
Nat. Hazards Earth Syst. Sci., 22, 1325–1334,Short summary
Monitoring soil moisture is important during droughts, but very few measurements are available. Consequently, land-surface models are essential tools for reproducing soil moisture dynamics. In this study, a hybrid approach allowed for regionalizing soil water content using a machine learning method. This approach proved to be efficient, compared to the use of soil property maps, to run a simple soil moisture accounting model, and therefore it can be applied in various regions.
Maria Francesca Caruso and Marco Marani
Nat. Hazards Earth Syst. Sci., 22, 1109–1128,Short summary
We comparatively evaluate the predictive performance of traditional and new approaches to estimate the probability distributions of extreme coastal water levels. The metastatistical approach maximizes the use of observational information and provides reliable estimates of high quantiles with respect to traditional methods. Leveraging the increased estimation accuracy afforded by this approach, we investigate future changes in the frequency of extreme total water levels.
Shupeng Yue, Xiaodan Sheng, and Fengtian Yang
Nat. Hazards Earth Syst. Sci., 22, 995–1014,Short summary
To develop drought assessment and early warning systems, it is necessary to explore the characteristics of drought and its propagation process. In this article, a generalized and efficient drought research framework is studied and verified. It includes the evaluation of the spatiotemporal evolution, the construction of the return period calculation model, and the quantitative analysis of the meteorological trigger conditions of drought based on an improved Bayesian network model.
Alexander J. Horton, Nguyen V. K. Triet, Long P. Hoang, Sokchhay Heng, Panha Hok, Sarit Chung, Jorma Koponen, and Matti Kummu
Nat. Hazards Earth Syst. Sci., 22, 967–983,Short summary
We studied the cumulative impact of future development and climate change scenarios on discharge and floods in the Cambodian Mekong floodplain. We found that hydropower impacts dominate, acting in opposition to climate change impacts to drastically increase dry season flows and reduce wet season flows even when considering the higher RCP8.5 level. The consequent reduction in flood extent and duration may reduce regional flood risk but may also have negative impacts on floodplain productivity.
Eva Boisson, Bruno Wilhelm, Emmanuel Garnier, Alain Mélo, Sandrine Anquetin, and Isabelle Ruin
Nat. Hazards Earth Syst. Sci., 22, 831–847,Short summary
We present the database of Historical Impacts of Floods in the Arve Valley (HIFAVa). It reports flood occurrences and impacts (1850–2015) in a French Alpine catchment. Our results show an increasing occurrence of impacts from 1920 onwards, which is more likely related to indirect source effects and/or increasing exposure rather than hydrological changes. The analysis reveals that small mountain streams caused more impacts (67 %) than the main river.
Francisco Peña, Fernando Nardi, Assefa Melesse, Jayantha Obeysekera, Fabio Castelli, René M. Price, Todd Crowl, and Noemi Gonzalez-Ramirez
Nat. Hazards Earth Syst. Sci., 22, 775–793,Short summary
Groundwater-induced flooding, a rare phenomenon that is increasing in low-elevation coastal cities due to higher water tables, is often neglected in flood risk mapping due to its sporadic frequency and considerably lower severity with respect to other flood hazards. A loosely coupled flood model is used to simulate the interplay between surface and subsurface flooding mechanisms simultaneously. This work opens new horizons on the development of compound flood models from a holistic perspective.
Melanie Fischer, Jana Brettin, Sigrid Roessner, Ariane Walz, Monique Fort, and Oliver Korup
Nat. Hazards Earth Syst. Sci. Discuss.,
Revised manuscript accepted for NHESSShort summary
Nepal’s second largest city is rapidly growing since the 1970s although its valley has been affected by rare, catastrophic outburst floods in recent and historic times. We analyse potential impacts of such floods on urban areas and infrastructure by modelling ten 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.
Qing Liu, Hanqing Xu, and Jun Wang
Nat. Hazards Earth Syst. Sci., 22, 665–675,Short summary
The coastal area is a major floodplain in compound flood events in coastal cities, primarily due to storm tide, with the inundation severity positively correlated with the height of the storm tide. Simply accumulating every single-driven flood hazard (rainstorm inundation and storm tide flooding) to define the compound flood hazard may cause underestimation. The assessment of tropical cyclone compound flood risk can provide vital insight for research on coastal flooding prevention.
Antonio-Juan Collados-Lara, Juan-de-Dios Gómez-Gómez, David Pulido-Velazquez, and Eulogio Pardo-Igúzquiza
Nat. Hazards Earth Syst. Sci., 22, 599–616,Short summary
This work studies the benefit of using more reliable local climate scenarios to analyse hydrological impacts. It has been applied in the Cenajo basin (south-eastern Spain), where we showed that the best approximations of the historical meteorology also provide the best approximations of the hydrology. The two selected climate models predict worrying changes in precipitation, temperature, streamflows and meteorological and hydrological droughts for the period 2071–2100 under the RCP8.5.
Agathe Bucherie, Micha Werner, Marc van den Homberg, and Simon Tembo
Nat. Hazards Earth Syst. Sci., 22, 461–480,Short summary
Local communities in northern Malawi have well-developed knowledge of the conditions leading to flash floods, spatially and temporally. Scientific analysis of catchment geomorphology and global reanalysis datasets corroborates this local knowledge, underlining the potential of these large-scale scientific datasets. Combining local knowledge with contemporary scientific datasets provides a common understanding of flash flood events, contributing to a more people-centred warning to flash floods.
Karen Gabriels, Patrick Willems, and Jos Van Orshoven
Nat. Hazards Earth Syst. Sci., 22, 395–410,Short summary
As land use influences hydrological processes (e.g., forests have a high water retention and infiltration capacity), it also impacts floods downstream in the river system. This paper demonstrates an approach quantifying the impact of land use changes on economic flood damages: damages in an initial situation are quantified and compared to damages of simulated floods associated with a land use change scenario. This approach can be used as an explorative tool in sustainable flood risk management.
Tao Liu, Luke A. McGuire, Nina Oakley, and Forest Cannon
Nat. Hazards Earth Syst. Sci., 22, 361–376,Short summary
A well-constrained rainfall-runoff model forced by radar-derived precipitation is used to define rainfall intensity-duration (ID) thresholds for flash floods. The rainfall ID doubles in 5 years after a severe wildfire in a watershed in southern California, USA. Rainfall ID performs stably well for intense pulses of rainfall over durations of 30-60 minutes that cover at least 15%-25% of the watershed. This finding could help issuing flash flood warnings based on radar-derived precipitation.
Annegret H. Thieken, Guilherme Samprogna Mohor, Heidi Kreibich, and Meike Müller
Nat. Hazards Earth Syst. Sci., 22, 165–185,Short summary
Various floods hit Germany recently. While there was a river flood with some dike breaches in 2013, flooding in 2016 resulted directly from heavy rainfall, causing overflowing drainage systems in urban areas and destructive flash floods in steep catchments. Based on survey data, we analysed how residents coped with these different floods. We observed significantly different flood impacts, warnings, behaviour and recovery, offering entry points for tailored risk communication and support.
Nat. Hazards Earth Syst. Sci., 22, 71–83,Short summary
This systematic review highlights flood mortality factors and the strategies to mitigate them, as obtained from 44 scientific articles published between 2010 and 2020. The findings are the classification of flood mortality drivers in two groups and the identification of strategies to cope with them. Future studies should fill the data gaps regarding flood fatalities in developing countries and information on people who have survived floods, which can be useful in educational campaigns.
Yuhan Yang, Jie Yin, Weiguo Zhang, Yan Zhang, Yi Lu, Yufan Liu, Aoyue Xiao, Yunxiao Wang, and Wenming Song
Nat. Hazards Earth Syst. Sci., 21, 3563–3572,Short summary
This is the first time the compound flooding process of heavy rain and levee-breach-induced flooding has been modeled. Real-life cases of historical flooding events have been adequately investigated. Our results provide a comprehensive view of the spatial patterns of the flood evolution, the dynamic process, and mechanism of these cases, which can help decision makers to develop effective emergency response plans and flood adaptation strategies.
Lucas Wouters, Anaïs Couasnon, Marleen C. de Ruiter, Marc J. C. van den Homberg, Aklilu Teklesadik, and Hans de Moel
Nat. Hazards Earth Syst. Sci., 21, 3199–3218,Short summary
This research introduces a novel approach to estimate flood damage in Malawi by applying a machine learning model to UAV imagery. We think that the development of such a model is an essential step to enable the swift allocation of resources for recovery by humanitarian decision-makers. By comparing this method (EUR 10 140) to a conventional land-use-based approach (EUR 15 782) for a specific flood event, recommendations are made for future assessments.
Haixia Zhang, Weihua Fang, Hua Zhang, and Lu Yu
Nat. Hazards Earth Syst. Sci., 21, 3161–3174,Short summary
Taking a single flood disaster in Lishui city as an example, a rapid and refined assessment of economic loss is studied and verified, which can effectively simulate the distribution of loss ratio and loss value. It includes the construction of land use type and value based on data fusion and an expert questionnaire survey, the fitting and calibration of vulnerability curves based on an existing database and disaster loss reporting, and estimation of loss ratio and loss value by spatial analysis.
Doris E. Wendt, John P. Bloomfield, Anne F. Van Loon, Margaret Garcia, Benedikt Heudorfer, Joshua Larsen, and David M. Hannah
Nat. Hazards Earth Syst. Sci., 21, 3113–3139,Short summary
Managing water demand and supply during droughts is complex, as highly pressured human–water systems can overuse water sources to maintain water supply. We evaluated the impact of drought policies on water resources using a socio-hydrological model. For a range of hydrogeological conditions, we found that integrated drought policies reduce baseflow and groundwater droughts most if extra surface water is imported, reducing the pressure on water resources during droughts.
Sara Lindersson, Luigia Brandimarte, Johanna Mård, and Giuliano Di Baldassarre
Nat. Hazards Earth Syst. Sci., 21, 2921–2948,Short summary
Riverine flood risk assessments require the identification of areas prone to potential flooding. We find that (topography-based) hydrogeomorphic floodplain maps can in many cases be useful for riverine flood risk assessments, particularly where hydrologic data are scarce. For 26 countries across the global south, we also demonstrate how dataset choice influences the estimated number of people living within flood-prone zones.
Mark V. Bernhofen, Mark A. Trigg, P. Andrew Sleigh, Christopher C. Sampson, and Andrew M. Smith
Nat. Hazards Earth Syst. Sci., 21, 2829–2847,Short summary
The use of different global datasets to calculate flood exposure can lead to differences in global flood exposure estimates. In this study, we use three global population datasets and a simple measure of a river’s flood susceptibility (based on the terrain alone) to explore how the choice of population data and the size of river represented in global flood models affect global and national flood exposure estimates.
Antonio Francipane, Dario Pumo, Marco Sinagra, Goffredo La Loggia, and Leonardo Valerio Noto
Nat. Hazards Earth Syst. Sci., 21, 2563–2580,Short summary
In the last few years, some cities in the Mediterranean area have witnessed an increase in extreme rainfall events such as urban floods. The study focuses on a particularly intense urban flood that occurred in Palermo on 15 July 2020, which highlighted the need for a shift in the way stormwater in urban settlements is managed. We think that the framework used to study the impacts of the event and some conclusive remarks could be easily transferred to other urban contexts.
Luc Bonnafous and Upmanu Lall
Nat. Hazards Earth Syst. Sci., 21, 2277–2284,Short summary
Extreme climate events can cause human and economic catastrophe at the global scale. For specific sectors, such as humanitarian aid or insurance, being able to understand how (i.e., with which frequency and intensity) these events can occur simultaneously at different locations or several times in a given amount of time and hit critical assets is all-important to design contingency plans. Here we develop an indicator to study co-occurence in space and time of wet and dry extremes.
Colin Keating, Donghoon Lee, Juan Bazo, and Paul Block
Nat. Hazards Earth Syst. Sci., 21, 2215–2231,Short summary
Disaster planning has historically underallocated resources for flood preparedness, but evidence supports reduced vulnerability via early actions. We evaluate the ability of multiple season-ahead streamflow prediction models to appropriately trigger early actions for the flood-prone Marañón River and Piura River in Peru. Our findings suggest that locally tailored statistical models may offer improved performance compared to operational physically based global models in low-data environments.
Antonia Longobardi, Ouafik Boulariah, and Paolo Villani
Nat. Hazards Earth Syst. Sci., 21, 2181–2196,Short summary
The current research was aimed at the description of historical drought periods that have characterized a broad area of the Mediterranean Basin and the Campania region, located in southern Italy. Knowledge of the past conditions would increase the awareness of the communities with respect to the frequency and severity of critical conditions which have affected and might further affect the environment in which they live.
Henk-Jan van Alphen, Clemens Strehl, Fabian Vollmer, Eduard Interwies, Anasha Petersen, Stefan Görlitz, Luca Locatelli, Montse Martinez Puentes, Maria Guerrero Hidalga, Elias Giannakis, Teun Spek, Marc Scheibel, Erle Kristvik, Fernanda Rocha, and Emmy Bergsma
Nat. Hazards Earth Syst. Sci., 21, 2145–2161,Short summary
This paper presents an approach to selecting and analysing climate change adaptation measures, using a combination of scientific analysis and stakeholder interaction. This approach was applied in six cases across Europe, concerning drought and extreme precipitation. Although the cases vary widely, the approach yielded decision-relevant outcomes for the development of adaptation strategies, regarding socio-economic impacts of measures and potential barriers to implementation.
Robert P. Dziak, Bryan A. Black, Yong Wei, and Susan G. Merle
Nat. Hazards Earth Syst. Sci., 21, 1971–1982,Short summary
On 26 January 1700 CE, a massive earthquake and tsunami struck the US Pacific Northwest west coast. The tsunami caused severe damage to coastal forests in Washington State. However, evidence of the impact on coastal Oregon trees has been difficult to find. We present some of the first evidence of tree-ring growth changes caused by the 1700 tsunami from an old-growth Douglas-fir stand located in South Beach, Oregon. We also present a tsunami inundation model of the 1700 earthquake.
Tigstu T. Dullo, George K. Darkwah, Sudershan Gangrade, Mario Morales-Hernández, M. Bulbul Sharif, Alfred J. Kalyanapu, Shih-Chieh Kao, Sheikh Ghafoor, and Moetasim Ashfaq
Nat. Hazards Earth Syst. Sci., 21, 1739–1757,Short summary
We studied the effect of potential future climate change on floods, flood protection, and electricity infrastructure in the Conasauga River watershed in the US using ensemble hydrodynamic modeling. We used a GPU-accelerated Two-dimensional Runoff Inundation Toolkit for Operational Needs (TRITON) hydrodynamic model to simulate floods. Overall, this study demonstrates how a fast hydrodynamic model can enhance flood frequency maps and vulnerability assessment under changing climatic conditions.
Sengphrachanh Phakonkham, So Kazama, and Daisuke Komori
Nat. Hazards Earth Syst. Sci., 21, 1551–1567,Short summary
The main objective of this study was to propose a new approach to integrating hazard maps to detect hazardous areas on a national scale, for which area-limited data are available. The analytical hierarchy process (AHP) was used as a tool to combine the different hazard maps into an integrated hazard map. The results from integrated hazard maps can identify dangerous areas from both individual and integrated hazards.
Eklavyya Popat and Petra Döll
Nat. Hazards Earth Syst. Sci., 21, 1337–1354,Short summary
Two drought hazard indices are presented that combine drought deficit and anomaly aspects: one for soil moisture drought (SMDAI) where we simplified the DSI and the other for streamflow drought (QDAI), which is to our knowledge the first ever deficit anomaly drought index including surface water demand. Both indices are tested at the global scale with WaterGAP 2.2d outputs, providing more differentiated spatial and temporal patterns distinguishing the actual degree of respective drought hazard.
Xudong Zhou, Wenchao Ma, Wataru Echizenya, and Dai Yamazaki
Nat. Hazards Earth Syst. Sci., 21, 1071–1085,Short summary
This article assesses different uncertainties in the analysis of flood risk and found the runoff generated before the river routing is the primary uncertainty source. This calls for attention to be focused on selecting an appropriate runoff for the flood analysis. The uncertainties are reflected in the flood water depth, inundation area and the exposure of the population and economy to the floods.
Kees C. H. van Ginkel, Francesco Dottori, Lorenzo Alfieri, Luc Feyen, and Elco E. Koks
Nat. Hazards Earth Syst. Sci., 21, 1011–1027,Short summary
This study presents a state-of-the-art approach to assess flood damage for each unique road segment in Europe. We find a mean total flood risk of EUR 230 million per year for all individual road segments combined. We identify flood hotspots in the Alps, along the Sava River, and on the Scandinavian Peninsula. To achieve this, we propose a new set of damage curves for roads and challenge the community to validate and improve these. Analysis of network effects can be easily added to our analysis.
Gijs van Kempen, Karin van der Wiel, and Lieke Anna Melsen
Nat. Hazards Earth Syst. Sci., 21, 961–976,Short summary
In this study, we combine climate model results with a hydrological model to investigate uncertainties in flood and drought risk. With the climate model, 2000 years of
current climatewas created. The hydrological model consisted of several building blocks that we could adapt. In this way, we could investigate the effect of these hydrological building blocks on high- and low-flow risk in four different climate zones with return periods of up to 500 years.
Allan, D. J. and Castillo, M. M.: Stream Ecology, Springer, Dordrecht, the Netherlands, 436 pp., 2007.
Armanini, A. and Larcher, M.: Rational criterion for designing opening of slit-check dam, J. Hydraul. Eng., 127, 94–104, https://doi.org/10.1061/(ASCE)0733-9429(2001)127:2(94), 2001.
Armanini, A., Dalri, C., and Larcher, M.: Slit-Check Dams for Controlling Debris Flow and Mudflow. Presented at the International Symposium Disaster Mitigation of Debris Flows, Slope Failures and Landslides, Universal Academy Press, Inc., 141–148, 2006.
Armanini, A., Dellagiacoma, F., and Ferrari, L.: From the check dam to the development of functional check dams, in: Fluvial Hydraulics of Mountain Regions, Springer-Verlag, 331–344, https://doi.org/10.1007/BFb0011200, 1991.
Baigún, C. R. M., Nestler, J. M., Minotti, P., and Oldani, N.: Fish passage system in an irrigation dam (Pilcomayo River basin): When engineering designs do not match ecohydraulic criteria, Neotrop. Ichthyol., 10, 741–750, https://doi.org/10.1590/S1679-62252012000400007, 2012.
Bain, M. B., Hughes, T. C., and Arend, K. K.: Trends in Methods for Assessing Freshwater Habitats, Fisheries, 24, 16–21, https://doi.org/10.1577/1548-8446(1999)024<0016:TIMFAF>2.0.CO;2, 1999.
Battisacco, E., Franca, M. J., and Schleiss, A. J.: Sediment replenishment: Influence of the geometrical configuration on the morphological evolution of channel-bed, Water Resour. Res., 52, 8879–8894, https://doi.org/10.1002/2016WR019157, 2016.
Bezzola, G. R., Sigg, H., and Lange, D.: Schwemmholzrückhalt in der Schweiz [Driftwood retention in Switzerland], Proceedings of INTERPRAEVENT, International Research Society Interpraevent, 29–40, 2004.
Brandt, S. A.: Classification of geomorphological effects downstream of dams, Catena, 40, 375–401, https://doi.org/10.1016/S0341-8162(00)00093-X, 2000.
Brown, C. B.: Discussion of “Sedimentation in reservoirs” by B. J. Witzig, Proc. Am. Soc. Civ. Eng., 69, 793–815, 1943.
Buffington, J. M. and Montgomery, D. R.: Effects of supply on surface textures of gravel-bed rivers, Water Resour. Res., 35, 3523–3530, https://doi.org/10.1029/1999WR900232, 1999.
Busnelli, M. M., Stelling, G. S., and Larcher, M.: Numerical Morphological Modeling of Open-Check Dams, J. Hydraul. Eng., 127, 105–114, https://doi.org/10.1061/(ASCE)0733-9429(2001)127:2(105), 2001.
Campisano, A., Cutore, P., and Modica, C.: Improving the Evaluation of Slit-Check Dam Trapping Efficiency by Using a 1D Unsteady Flow Numerical Model, J. Hydraul. Eng., 140, 04014024, 1–11, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000868, 2014.
Castillo, C., Pérez, R., and Gómez, J. A.: A conceptual model of check dam hydraulics for gully control: efficiency, optimal spacing and relation with step-pools, Hydrol. Earth Syst. Sci., 18, 1705–1721, https://doi.org/10.5194/hess-18-1705-2014, 2014.
Comiti, F., Mao, L., Wilcox, A., Wohl, E. E., and Lenzi, M. A.: Field-derived relationships for flow velocity and resistance in high-gradient streams, J. Hydrol., 340, 48–62, https://doi.org/10.1016/j.jhydrol.2007.03.021, 2007.
Comiti, F.: How natural are Alpine mountain rivers? Evidence from the Italian Alps, Earth Surf. Proc. Land., 37, 693–707, https://doi.org/10.1002/esp.2267, 2012.
Comiti, F., D'Agostino, V., Moser, M., Lenzi, M. A., Bettella, F., Dell'Agnese, A. E. R., Gius, S., and Mazzorana, B.: Preventing wood-related hazards in mountain basins: from wood load estimation to designing retention structures, Proceedings of INTERPRAEVENT, International Research Society Interpraevent, 651–662, 2012.
Comiti, F., Lucía, A., and Rickenmann, D.: Large wood recruitment and transport during large floods: A review, Geomorphology, 269, 23–39, https://doi.org/10.1016/j.geomorph.2016.06.016, 2016.
Crowder, D. W. and Knapp, V. H.: Effective discharge recurrence intervals of Illinois streams, Geomorphology, 64, 167–184, https://doi.org/10.1016/j.geomorph.2004.06.006, 2005.
D'Agostino, V.: Filtering-retention check dam design in mountain torrents, in: Check Dams, Morphological Adjustments and Erosion Control in Torrential Streams, edited by: Garcia, C. and Lenzi, M. A., Nova Science, 185–210, 2013.
D'Agostino, V. and Lenzi, M. A.: La valutazione del trasporto solido di fondo nel bacino attrezzato del Rio Cordon [The validation of bed-load transport in the Rio Cordon catchment], L'Acqua, 4, 23–40, 1996.
Denic, M. and Geist, J.: Linking Stream Sediment Deposition and Aquatic Habitat Quality in Pearl Mussel Streams: Implications for Conservation, River Res. Appl., 31, 943–952, https://doi.org/10.1002/rra.2794, 2015.
DWA: Merkblatt DWA-M 509, Fischaufstiegsanlagen und fischpassierbare Bauwerke [Technical bulletin for fishways], (Deutsche Vereinigung für Wasserwirtschaft, Abwasser und Abfall e.V.), 2014.
Einstein, H. A.: The Bed-Load Function for Sediment Transport in Open Channel Flows, Tech. Bull, USDA Soil Conserv. Serv., 1026, 71–71, 1950.
Gilvear, D. J., Spray, C. J., and Casas-Mulet, R.: River rehabilitation for the delivery of multiple ecosystem services at the river network scale, Environ. Manage., 126, 30–43, https://doi.org/10.1016/j.jenvman.2013.03.026, 2013.
Gisen, D. C., Weichert, R. B., and Nestler, J. M.: Optimizing attraction flow for upstream fish passage at a hydropower dam employing 3D Detached-Eddy Simulation, Ecol. Eng., 100, 344–353, https://doi.org/10.1016/j.ecoleng.2016.10.065, 2017.
Gomi, T., Sidle, R. C., and Richardson, J. S.: Understanding Processes and Downstream Linkages of Headwater Systems, BioScience, 52, 905–916, https://doi.org/10.1641/0006-3568(2002)052[0905:UPADLO]2.0.CO;2, 2002.
Grant, G. E.: Critical flow constrains flow hydraulics in mobile-bed streams: A new hypothesis, Water Resour. Res., 33, 349–358, https://doi.org/10.1029/96WR03134, 1997.
GoPro Hero: GoPro User Manual, GoPro Hero 4 Silver Edition, 94 pp., 2016.
Hampel, R.: Geschiebeablagerung in Wildbächen dargestellt in Modellversuchen [Bed load deposition in mountain rivers illustrated in physical experiments], Wildbach-Lawinenverbauung, 1, 100 pp., 1968.
Hassan, M., Brayshaw, D., Alila, Y., and Andrews, E.: Effective discharge in small formerly glaciated mountain streams of British Columbia: Limitations and implications, Water Resour. Res., 50, 4440–4458, https://doi.org/10.1002/2013WR014529, 2014.
Hassan, M. A., Church, M., Lisle, T. E., Brardinoni, F., Benda, L., and Grant, G. E.: Sediment transport and channel morphology of small, forested streams, J. Am. Water Resour. Assoc., 41, 853–876, https://doi.org/10.1111/j.1752-1688.2005.tb03774.x, 2005.
Heyman, J., Bohorquez, P., and Ancey, C.: Entrainment, motion, and deposition of coarse particles transported by water over a sloping mobile bed, J. Geophys. Res.-Earth., 121, 1931–1952, https://doi.org/10.1002/2015JF003672, 2016.
Hübl, J., Holzinger, G., and Wehrmann, H.: Entwicklung von Grundlagen zur Dimensionierung kronenoffener Bauwerke für die Geschiebebewirtschaftung in Wildbächen: Klassifikation von Wildbachsperren [Development of design basics for open-gap crested structures for the management of bed load in mountain rivers: Classification of torrenital barriers], WLS Report 50, Band 2, 85 pp., BMLFUW, 2003.
Hübl, J., Holub, M., and Suda, J.: Structural mitigation measures, in: 3rd Probabilistic Workshop: Technical Systems + Natural Hazards, edited by: Bergmeister, K., Rickenmann, D., Strauss, A., Wieshofer, S., Curbach, M., and Proske, D., Universität für Bodenkultur, Department für Bautechnik und Naturgefahren, 115–126, 2005.
Hübl, J., Feisch, M., Chiari, M., and Kaitna, R.: Physikalische Modellversuche zur Optimierung der Geschieberückhaltesperre am Gadriabach (Vinschgau,Südtirol) [Physical model experiments to optimise the open check dam at the Gadriabach (Vinschgau, South Tyrol)], IAN Report 144, Institut für Alpine Naturgefahren, Universität für Bodenkultur – Wien (unveröffentlicht), 2012.
Johnson, J. P. L.: Gravel threshold of motion: a state function of sediment transport disequilibrium?, Earth Surf. Dynam., 4, 685–703, https://doi.org/10.5194/esurf-4-685-2016, 2016.
Jordan, F., Jaeggi, M. N., and Nigg, U.: Modélisation physique d'un piège à graviers, le cas du Baltschiederbach, Wasser Energ. Luft, 9, 283–290, 2003.
Kaitna, R., Chiari, M., Kerschbaumer, M., Kapeller, H., Zlatic-Jugovic, J., Hengl, M., and Huebl, J.: Physical and numerical modelling of a bedload deposition area for an Alpine torrent, Nat. Hazards Earth Syst. Sci., 11, 1589–1597, https://doi.org/10.5194/nhess-11-1589-2011, 2011.
Kaitna, R. and Hübl, J.: Silent witnesses for torrential processes, in: Dating Torrential Processes on Fans and Cones, edited by: Schneuwly-Bollschweiler, M., Stoffel, M., Rudolf-Miklau, F., Springer, Dordrecht, Heidelberg, New York, London, 111–130, 2013.
Kondolf, G. M.: Hungry Water: Effects of Dams and Gravel Mining on River Channels, Environ. Manage., 21, 533–551, 1997.
Kronfellner-Krauss, G.: Neue Bauweisen in der Wildbach- und Lawinenverbauung in internationaler Sicht [New construction methods of torrent and avalanche control from an international point of view], Cent. Für Gesamte Forstwes., 1, 33–57, 1972.
Lachat, E., Macher, H., Mittet, M.-A., Landes, T., and Grussenmeyer, P.: First experiences with Kinect V2 sensor for close range 3D modelling, Int. Arch. Photogramm. Remote Sens. Spat. Inf. Sci. XL-5/W4, 93–100, https://doi.org/10.5194/isprsarchives-XL-5-W4-93-2015, 2015.
Lane, S. N., Bakker, M., Balin, D., Lovis, B., and Regamey, B.: Climate and human forcing of Alpine River flow, in: Proceedings of River Flow 2014, edited by: Schleiss, A. J., De Cesare, G., Franca, M. J., and Pfister, M., Taylor & Francis Group, 7–15, 2014.
Lange, D. and Bezzola, G. R.: Schwemmholz Probleme und Lösungansätze [Driftwood problems and approaches for solutions], edited by: Minor, H.-E., Mitt. Nr. 188 der Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie an der Eidgenössischen Technischen Hochschule Zürich, 2006.
Lassettre, N. S. and Kondolf, G. M.: Large Woody Debris in Urban Stream Channel: Redefining the Problem, River Res. Appl., 28, 1477–1487, https://doi.org/10.1002/rra.1538, 2012.
Lenzi, M. A., Mao, L., and Comiti, F.: Effective discharge for sediment transport in a mountain river: Computational approaches and geomorphic effectiveness, J. Hydrol., 326, 257–276, https://doi.org/10.1016/j.jhydrol.2005.10.031, 2006.
Leys, E.: Die technischen und wirtschaftlichen Grundlagen in der Wildbachverbauung der großdoligen und der kronenoffenen Bauweise [Technical and economical basics of hydraulic constructions in mountain rivers in terms of large openings and open crested architecture], Universität für Bodenkultur, 1976.
Mazzorana, B., Comiti, F., Scherer, C., and Fuchs, S.: Developing consistent scenarios to assess flood hazards in mountain streams, Environ. Manage., 94, 112–124, https://doi.org/10.1016/j.jenvman.2011.06.030, 2012.
Meyer-Peter, E. and Müller, R.: Formulas for Bed-Load transport, IAHSR Append. 2, 2nd meeting, 39–65, 1948.
Milhous, R. T.: Modelling of instream flow needs: the link between sediment and aquatic habitat, Regul. River, 14, 79–94, https://doi.org/10.1002/(SICI)1099-1646(199801/02)14:1<79::AID-RRR478>3.0.CO;2-9, 1998.
Mizuyama, T.: Structural Countermeasures for Debris Flow Disasters, Int. J. Eros. Control Eng., 1, 38–43, 2008.
Morris, G. L., Annandale, G., and Hotchkiss, R.: Reservoir Sedimentation, in: Sedimentation Engineering, edited by: García, M. H., American Society of Civil Engineers, 579–612, https://doi.org/10.1061/9780784408148.ch12, 2008.
Moyle, P. B. and Mount, J. F.: Homogenous rivers, homogenous faunas, P. Natl. Acad. Sci. USA, 104, 5711–5712, https://doi.org/10.1073/pnas.0701457104, 2007.
Osti, R. and Egashira, S.: Sediment transportation from bed-load to debris-flow and its control by check dams in torrential streams, in: Check Dams, Morphological Adjustments and Erosion Control in Torrential Streams, edited by: Garcia, C. and Lenzi, M. A., Nova Science, 151–184, 2013.
Parker, G., Paola, C., Whipple, K. X., and Mohrig, D.: Alluvial Fans formed by channelized fluvial and sheet flow, I: Theory, J. Hydraul. Eng., 124, 985–995, 1998.
Pasternack, G. B. and Wyrick, J. R.: Flood-driven topographic changes in a gravel-cobble river over segment, reach, and morphological unit scales, Earth Surf. Proc. Land., 42, 487–502, https://doi.org/10.1002/esp.4064, 2017.
Piton, G. and Recking, A.: The concept of travelling bedload and its consequences for bedload computation in mountain streams, Earth Surf. Process. Land., 52–52, https://doi.org/10.1002/esp.4105, 2017.
Piton, G. and Recking, A.: Design of Sediment Traps with Open Check Dams. I: Hydraulic and Deposition Processes, J. Hydraul. Eng., 142, 04015045, https://doi.org/10.1061/(ASCE)HY.1943-7900.0001048, 2016a.
Piton, G. and Recking, A.: Design of Sediment Traps with Open Check Dams. II: Woody Debris, J. Hydraul. Eng., 142, 04015046, https://doi.org/10.1061/(ASCE)HY.1943-7900.0001049, 2016b.
Piton, G., Carladous, S., Reckin, A., Tacnet, J. M., Liébault, F., Kuss, D., Quefféléan, Y., and Marco, O.: Why do we build check dams in Alpine streams? An historical perspective from the French experience, Earth Surf. Process. Land., 42, 91–108, https://doi.org/10.1002/esp.3967, 2017.
Recking, A.: Simple method for calculating reach-averaged bed-load transport, J. Hydraul. Eng., 139, 70–75, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000653, 2013.
Recking, A., Piton, G., Vazquez-Tarrio, D., and Parker, G.: Quantifying the morphological print of bedload transport, Earth Surf. Process. Land., 41, 809–822, https://doi.org/10.1002/esp.3869, 2016.
Rickenmann, D. and Recking, A.: Evaluation of flow resistance in gravel-bed rivers through a large field data set, Water Resour. Res., 47, W07538, https://doi.org/10.1029/2010WR009793, 2011.
Rosgen, D. L.: A classification of natural rivers, Catena, 22, 169–199, 1994.
Schmocker, L. and Weitbrecht, V. Driftwood: Risk analysis and engineering measures, J. Hydraul. Eng., 139, 683–695, https://doi.org/10.1061/(ASCE)HY.1943-7900.0000728, 2013.
Schwindt, S.: Hydro-morphological processes through permeable sediment traps at mountain rivers, Communication LCH N ∘71, edited by: Schleiss, A. J., Lausanne, Switzerland, available at: https://infoscience.epfl.ch/record/231182 (last access: 22 February 2018), 2017.
Schwindt, S., Piton, G., De Cesare, G., Recking, A., and Schleiss, A. J.: Study of the effects of a distanced retention basin combined with an open check dam on a physical model, in: Proceedings of INTERPRAEVENT: Hazard and risk mitigation, Extended Abstracts, edited by: Koboltschnig, G., International Research Society Interpraevent, 322–323, 2016.
Schwindt, S., Franca, M. J., De Cesare, G., and Schleiss, A. J.: Analysis of mechanical-hydraulic deposition control measures, Geomorphology, 295, 467–479, https://doi.org/10.1016/j.geomorph.2017.07.020, 2017a.
Schwindt, S., Franca, M. J., and Schleiss, A. J.: Effects of lateral and vertical constrictions on flow in rough steep channels, J. Hydraul. Eng., 1–14, https://doi.org/10.1061/(ASCE)HY.1943-7900.0001389, 2017b.
Schwindt, S., Franca, M. J., and Schleiss, A. J.: The influence of the channel slope of flow contractions in steep channels, J. Hydraul. Res., in press, 2018.
Senter, A. E. and Pasternack, G. B.: Large wood aids spawning Chinook salmon (Oncorhynchus tshawytscha) in marginal habitat on a regulated river in California, River Res. Appl., 27, 550–565, https://doi.org/10.1002/rra.1388, 2011.
Smart, G. M. and Jaeggi, M. N. R.: Sedimenttransport in steilen Gerinnen [Sediment Transport on Steep Slopes], Mitt. Nr. 64 der Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie an der Eidgenössischen Technischen Hochschule Zürich, 1983.
Sodnik, J., Martinčič, M., Mikoš, M., and Kryžanowski, A.: Are Torrent Check-Dams Potential Debris-Flow Sources?, in: Engineering Geology for Society and Territory – Volume 2: Landslide Processes, edited by: Lollino, G., Giordan, D., Crosta, G. B., Corominas, J., Azzam, R., Wasowski, J., and Sciarra, N., Springer International Publishing, 485–488, https://doi.org/10.1007/978-3-319-09057-3_79, 2015.
Sponseller, R. A., Heffernan, J. B., and Fisher, S. G.: On the multiple ecological roles of water in river networks, Ecosphere, 4, 1–14, https://doi.org/10.1890/ES12-00225.1, 2013.
Tamagni, S.: Unstructured block ramps, Mitt. Nr. 223 der Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie der Eidgenössische Technische Hochschule Zürich, 2013.
Uchiogi, T., Shima, J., Tajima, H., and Ishikawa, Y.: Design methods for wood-debris entrapment, Proceedings of INTERPRAEVENT, International Research Society Interpraevent, 279–288, 1996.
Wang, F.: Grundriss der Wildbachverbauung, Verlag von S. Hirzel, 1903.
Watanabe, M., Mizuyama, T., and Uehara, S.: Review of debris flow countermeasure facilities, J. Jpn. Eros. Control Eng. Soc., 115, 40–48, 1980.
Wilcock, P.: Sediment Transport Primer (Estimating Bed-Material Transport in Gravel-bedded Rivers), USDA Forest Service, 2008.
Williams, G. P. and Wolman, M. G.: Downstream Effects of Dams on Alluvial Rivers, in: Geological Survey Professional Papers, U.S. Government, Paper 1286, 1984.
Wolman, M. G. and Leopold, L. B.: River Channel Patterns: Braided, Meandering and Straight, Physiogr. Hydraul. Stud. Rivers Geol. Surv. Prof. Pap. 282–B, 1–85, 1957a.
Wolman, M. G. and Leopold, L. B.: River flood plains some observations on their formation, Physiogr. Hydraul. Stud. Rivers Geol. Surv. Prof. Pap. 282–C, 1–107, 1957b.
Wolman, M. G. and Miller, J. P.: Magnitude and frequency of forces in geomorphic processes, J. Geol., 68, 54–74, 1960.
Yalin, M. S.: Mechanics of sediment transport, Pergamon press Oxford, 1977.
Yu, G., Wang, Z., Zhang, K., Chang, T., and Liu, H.: Effect of incoming sediment on the transport rate of bed load in mountain streams, Int. J. Sediment Res., 24, 260–273, https://doi.org/10.1016/S1001-6279(10)60002-9, 2009.
Zeller, J.: Die Entleerung verlandeter Geschieberückhalteräume, Diskussionsbeitrag [The flushing of up-silted sediment retention basins, discussion], Mitt. Forstl. Bundesversuchsanstalt Wien, 102, 389–397, 1973.
Zimmermann, A.: Flow resistance in steep streams: An experimental study, Water Resour. Res., 46, W09536, https://doi.org/10.1029/2009WR007913, 2010.
Zollinger, F.: Die verschiedenen Funktionen von Geschieberückhaltebauwerken [The different functions of debris retention dams], Proceedings of INTERPRAEVENT, International Research Society Interpraevent, 147–160, 1984.
Zollinger, F.: Die Vorgänge in einem Geschiebeablagerungsplatz: ihre Morphologie und ihre Möglichkeiten einer Steuerung [The processes in sediment traps: their morphology and their possibilities of control], ETH Zürich, 1983.
Mountain rivers can mobilize important amounts of sediment that endanger downstream dwellers and infrastructure during floods. Sediment traps are built immediately upstream of urban areas to retain hazardous sediment. However, many sediment traps retain too much sediment, which is then missing in downstream river sections, leading to a poor eco-morphological state. This study proposes an experimental research-based solution to improve sediment traps using a guiding channel.
Mountain rivers can mobilize important amounts of sediment that endanger downstream dwellers and...