Rainer Bell

Rainer Bell
University of Bonn | Uni Bonn ·  Department of Geography

About

110
Publications
30,546
Reads
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1,750
Citations
Citations since 2016
30 Research Items
1279 Citations
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2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250

Publications

Publications (110)
Chapter
Full-text available
Various regions in Europe were hit by extreme rainfall from July 12 to 19, 2021 generated by a quasi-stationary atmospheric low pressure system named “Bernd”. The mainly affected areas were two federal states in western Germany and adjacent regions in Belgium. The July flood was the costliest natural disaster in Germany in recent history, with loss...
Article
Full-text available
About 10% of Europe's surface area is prone to rapid flooding of rivers confined in valleys. The devastating potential of such floods is exacerbated by the deficits of existing gauging networks, including low station densities and recording frequencies, and lack of information beyond stage height. Here, we use seismic data of the July 2021 Ahrtal f...
Article
Full-text available
Rapidly evolving floods are rare but powerful drivers of landscape reorganisation that have severe and long-lasting impacts on both the functions of a landscape’s subsystems and the affected society. The July 2021 flood that particularly hit several river catchments of the Eifel region in western Germany and Belgium was a drastic example. While med...
Preprint
Full-text available
Rapidly evolving floods are rare but powerful drivers of landscape reorganisation that have severe and long lasting impacts on both the functions of a landscape’s subsystems and the affected society. The July 2021 flood that particularly hit several river catchments of the Eifel region in West Germany and Belgium was a drastic example. While media...
Article
Full-text available
The Seti River originates from the Annapurna Massif in the Higher Himalaya of Nepal and flows through the Pokhara valley in the Lesser Himalaya. The Seti River witnessed a disastrous flash flood on May 5th, 2012 causing the death of 72 people, obliterating dozens of homes and damaging infrastructures worth millions of dollars. Despite the 2012 floo...
Article
Full-text available
In the past 20 years, motor road and bridge construction works have increased significantly in Nepal, in most cases with poor consideration of geo-hazards (rockfalls, landslides, debris flows) and river-flow dynamics. The National Road Construction (NRC) is further fostered by China's Belt and Road Initiative (BRI). Currently, the Kali Gandaki (KG)...
Article
Full-text available
Highest geomorphic activity in the central Nepal Himalayas is mainly driven by monsoonal precipitation. In contrast, the northern flanks of the Nepal Himalaya lay in the relative dry rain shadow of the mountain range. During the monsoon 2018, major floods and geomorphic events occurred in the Kali Gandaki (KG) valley impacting both the monsoon-affe...
Chapter
Full-text available
Based on empirical work from Nepal, we introduce an actor-oriented, agency-based model of Agency Towards Resilience (ATR) in the context of natural hazards. Our approach recognizes individuals as active agents who have the ability and willingness to take actions for building resilience. While the ability to act is influenced by structural condition...
Article
Full-text available
Tourism is an important source of income for many mountain communities in Nepal. However, the tourism industry is highly vulnerable to a variety of natural hazards. The ability of local people to proactively prepare, protect, and support prevention activities against natural hazards drives a mountain community's resilience. Research on whether and...
Poster
Full-text available
Interactions between the dynamics of a small "landslide catchment" and new infrasctructure development: the Ghatte khola, Myagdi District, Nepal Himalaya. Geophysical Research Abstracts, Vol. 21, EGU2019-3653-2, 2019
Conference Paper
Full-text available
Small river catchments play a major role in the overall denudation of the Himalayas, because they may generate extreme geomorphic events. Their potential impacts on the morphology and dynamics of trunk rivers may also affect new infrastructure and settlements located along the valley floor. The Ghatte Khola, an intermittent tributary of the Kali Ga...
Conference Paper
Full-text available
Glacial lake outburst floods (GLOF) are one of the most hazardous processes in glaciated high mountain areas. In the Everest region the Dig Tsho GLOF in 1985 destroyed numerous houses, bridges, farmland, a hydro power station and trails. Currently, the potential GLOF of Imja lake (88 million m 3) poses severe risks to numerous villages downstream o...
Conference Paper
Full-text available
A number of studies highlight that the explanatory power of a statistical landslide susceptibility model is conditional on a truthful spatial representation of past landslide occurrences. However, landslide inventories are often incomplete and subject to known or unknown systematic errors. We assume that ignoring such common landslide inventory bia...
Article
Full-text available
On the regional scale, investigations on future landslide can broadly be distinguished in spatial or temporal analyses, i.e. landslide susceptibility or hazard maps, and landslide triggering rainfall thresholds. Even though both approaches have its uses e.g. in spatial planning, risk management and early warning, they also have limitations. Suscept...
Article
Full-text available
Complete landslide inventories are rarely available. The objectives of this study were to (i) elaborate the influence of incomplete landslide inventories on statistical landslide susceptibility models and to (ii) propose suitable modelling strategies that can reduce the effects of inventory-based incompleteness. In this context, we examined whether...
Article
Full-text available
There is unanimous agreement that a precise spatial representation of past landslide occurrences is a prerequisite to produce high quality statistical landslide susceptibility models. Even though perfectly accurate landslide inventories rarely exist, investigations of how landslide inventory-based errorspropagate into subsequent statistical landsli...
Article
Full-text available
There is unanimous agreement that a precise spatial representation of past landslide occurrences is a prerequisite to produce high quality statistical landslide susceptibility models. Even though perfectly accurate landslide inventories rarely exist, investigations of how landslide inventory-based errors propagate into subsequent statistical landsl...
Article
Full-text available
Landslide inventories are the most important data source for landslide process, susceptibility, hazard, and risk analyses. The objective of this study was to identify an effective method for mapping a landslide inventory for a large study area (19,186 km2) from Light Detection and Ranging (LiDAR) digital terrain model (DTM) derivatives. This invent...
Article
Landslides are an important means of conveying sediment from slopes to channels in steepland environments, but landsliding is a discontinuous process. This means that any single assessment in time of their contribution to the sediment cascade is of limited value. To better understand landscape dynamics and the contribution of landslides to slope–ch...
Chapter
The causes of landslides are manifold and highly influenced by multiple interacting natural and anthropogenic factors. In particular human induced land cover changes, such as deforestation and afforestation are known to strongly influence slope stability. Thus, we investigate the understanding of differences between forested and non-forested condit...
Article
Empirical models are frequently applied to produce landslide susceptibility maps for large areas. Subsequent quantitative validation results are routinely used as the primary criteria to infer the validity and applicability of the final maps or to select one of several models. This study hypothesizes that such direct deductions can be misleading. T...
Conference Paper
Full-text available
Several publications emphasize that the quality of statistical landslide susceptibility maps is highly dependent on the completeness and positional accuracy of the landslide inventory used as a response variable to produce the underlying models. We assume that erroneous landslide inventories distort relationships between a landslide inventory and i...
Article
Full-text available
Landslides cause significant damage in many parts of the world and consequently many efforts have been made to forecast the spatial probability of future slope failures. In particular regional landslide susceptibility and hazard models have become popular over the last years because they delineate areas which are likely to experience slope failures...
Conference Paper
Full-text available
Landslides play a key role in landscape evolution in the Eastern Alps. These geomorphic phenomena are influenced by multiple interdependent and interacting natural and anthropogenic factors. An in-depth evaluation of the spatial distribution of existing landslides enables to gain first insights into potentially hazardous areas. Morphometric analysi...
Article
Full-text available
Sagarmatha National Park and Buffer Zone (SNPBZ) in the Everest region in Nepal is among the most popular destinations for trekking tourism in Nepal. The dramatic growth of the tourism industry has increased pressures on the environment and the National Park is heavily affected by the rapidly growing waste issue. Besides, major mass movements play...
Conference Paper
Full-text available
Landslide susceptibility maps can be elaborated using a variety of methodological approaches. This study investigates quantitative and qualitative differences between two statistical modelling methods, taking into account the impact of two different response variables (landslide inventories) for the Rhenodanubian Flysch zone of Lower Austria. Quant...
Conference Paper
Full-text available
Statistical landslide susceptibility maps express a relative estimate of where landslides are more likely to occur in the future due to a set of geo-environmental conditions. Their predictive capability is regularly deduced by interpreting threshold independent performance measures like the area under the receiver operating characteristic curve (AU...
Conference Paper
Full-text available
Landslides of the slide-type movement represent potentially damaging phenomena for residents, their properties and infrastructure all over the world. The causes of these geomorphic processes are manifold as multiple interacting natural and anthropogenic factors influence their occurrence. Numerous studies reveal that human induced land cover change...
Article
The potential of surface roughness to quantify geomorphological landforms and processes has been enhanced with the availability of high-resolution digital terrain models (DTM). Recent studies that attempt to identify landslide features with surface roughness have suggested that this measure of topographic heterogeneity may also be applied to estima...
Article
Full-text available
Landslide susceptibility maps are helpful tools to identify areas potentially prone to future landslide occurrence. As more and more national and provincial authorities demand for these maps to be computed and implemented in spatial planning strategies, several aspects of the quality of the landslide susceptibility model and the resulting classifie...
Chapter
Full-text available
In statistical landslide susceptibility modelling the identification of appropriate explanatory variables describing the predisposing and preparatory factors for the landslides of a given inventory is important. In this context information on the age and the respective land cover at the time of occurrence is beneficiary. The potential of mapping ve...
Conference Paper
Landslide susceptibility maps express an estimate of “where” landslides are likely to occur in the future by assuming that future events evolve under the same conditions as past landslides. This study investigates the usefulness of an expert based quality assessment (geomorphic plausibility) of landslide susceptibility maps by comparing four landsl...
Article
Full-text available
Landslides are a significant hazard in many parts of the world and exhibit a high, and often underestimated, damage potential. Deploying landslide early warning systems is one risk management strategy that, amongst others, can be used to protect local communities. In geotechnical applications, slope stability models play an important role in predic...
Conference Paper
Full-text available
Landslides frequently cause damage to agricultural land and infrastructure in Lower Austria - a province of Austria. Also settlements and people are threatened by landslides. To reduce landslide risks and to prevent the establishment of new settlements in highly landslide prone areas, the project "MoNOE" (Method development for landslide susceptibi...
Conference Paper
Full-text available
Statistical susceptibility modeling presents a widespread method to identify landslide prone areas. Since these quantitative methods are highly dependent on the quality of the input data, an appropriate selection of variables is essential. In this study a comprehensive spatial analysis of slope conditions, where landslides occurred in the rhenodanu...
Article
Landslides are an important means of conveying sediment from slopes to channels in forested steepland environments, but their occurrence and connectivity is highly variable. This means that any single assessment in time of their contribution to the sediment cascade is of limited value. To better understand landscape dynamics and the variability of...
Article
Full-text available
Landslide susceptibility maps are helpful tools to identify areas which might be prone to future landslide occurrence. As more and more national and provincial authorities demand for these maps to be computed and implemented in spatial planning strategies, the quality of the landslide susceptibility map and of the model applied to compute them is o...
Chapter
Full-text available
This study focuses on the comparison of different approaches for landslide susceptibility modelling and is part of the research project “MoNOE” (Method development for landslide susceptibility modelling in Lower Austria). The main objective of the project is to design a method for landslide susceptibility modelling for a large study area. For other...
Chapter
Full-text available
Landslides threaten most parts of the provincial state of Lower Austria and cause damage to agricultural land, forests, infrastructure, settlements and people. Thus, the project “MoNOE” (Method development for landslide susceptibility modelling in Lower Austria) was initiated by the provincial government to tackle these problems and to reduce furth...
Article
Landslide inventories, their accuracy and the stored information are of major importance for landslide susceptibility modelling. Working on the scale of a province (Lower Austria with about 10,000 km2) challenges arise due to data availability and its spatial representation. Furthermore, previous studies on existing landslide inventories showed tha...
Conference Paper
Full-text available
Landslides pose threats not only for specific localities, they are also influencing larger areas and consequently require spatial analysis methods for assessing the susceptibility to landslides. The availability of landslide susceptibility maps and their consideration in spatial planning practises is a major step towards avoidance of damage due to...
Article
Many regions worldwide are threatened by multiple natural hazards with the potential to cause high damages and losses. However, the modeling of multiple hazards in a joint analysis scheme is still in the early stages of development as a range of serious challenges emerges in the multihazard context such as differing modeling approaches in use for c...
Conference Paper
Landslide inventories provide an essential basis for studies on sediment budgets, landform evolution and landslide hazard and risk. Thus, landslide activity in a given region should be well understood and substantial complete landslide inventories should be set up. Beside others airborne lidar data and multi-temporal interpretation of aerial photog...
Conference Paper
Full-text available
The prediction and forecast of widespread landsliding for a given triggering event is an open research question. Numerous studies tried to link spatial rainfall and landslide distributions. This study focuses on analysing the relationship between intensive precipitation and rainfall-triggered shallow landslides in the year 2009 in Lower Austria. La...
Conference Paper
Full-text available
In landslide susceptibility modelling, lithology is often only available at rather coarse scales. The effects of this course resolution on the final map are often unknown. Thus, the aim of this study is to investigate how different lithological data affect the results of landslide susceptibility modelling and to analyse spatial differences in the r...
Article
Bell, R., Petschko, H., Röhrs, M. and Dix, A. Assessment of landslide age, landslide persistence and human impact using airborne laser scanning digital terrain models. Geografiska Annaler: Series A, Physical Geography, 94, 135–156. doi:10.1111/j.1468-0459.2012.00454.x Landslides occur worldwide and contribute significantly to sediment budgets as we...
Chapter
Full-text available
Landslide susceptibility maps are prepared worldwide on local, regional or national scale toidentify regions or hillslopes that might be prone to landslides in future. Furthermore, with increasing fre-quency provincial governments and other stakeholders demand for susceptibility maps on the scale of a prov-ince or a state aiming at hazard mitigatio...
Article
Full-text available
Debris flows are among the most dangerous processes in mountainous areas due to their rapid rate of movement and long runout zone. Sudden and rather unexpected impacts produce not only damages to buildings and infrastructure but also threaten human lives. Medium- to regional-scale susceptibility analyses allow the identification of the most endange...
Article
Full-text available
It is important to calculate these areas prone for future landsiding through landslide susceptibility maps. A landslide causative factor database both before and after datasets was constructed. Data are stored in a resolution of 30×30m and include digital orthophoto maps (DOM), digital elevation model (DEM) and derived topographical parameters (e.g...