Remotely sensed rivers in the Anthropocene: state of the art and prospects

Earth Surface Processes and Landforms, Journal Year: 2019, Volume and Issue: 45(1), P. 157 - 188

Published: Dec. 12, 2019

ABSTRACT The rivers of the world are undergoing accelerated change in Anthropocene, and need to be managed at much broader spatial temporal scales than before. Fluvial remote sensing now offers a technical methodological framework that can deployed monitor processes work assess trajectories Anthropocene. In this paper, we review research investigating past, present future fluvial corridor conditions using consider emerging challenges facing riparian research. We introduce suite methods designed diagnose river changes reach regional scales. then focus on identification channel patterns acting from satellite, airborne or ground acquisitions. These techniques range grain landform scales, real time inter‐annual discuss how data coupled catchment scale models simulate sediment transfer within connected networks. also opportunities terms datasets other resources which likely impact management monitoring global scale. conclude with summary prospects for remotely sensed © 2019 John Wiley & Sons, Ltd.

Language: Английский

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Flood Risk in Urban Areas: Modelling, Management and Adaptation to Climate Change. A Review

Hydrology, Journal Year: 2022, Volume and Issue: 9(3), P. 50 - 50

Published: March 18, 2022

The modelling and management of flood risk in urban areas are increasingly recognized as global challenges. complexity these issues is a consequence the existence several distinct sources risk, including not only fluvial, tidal coastal flooding, but also exposure to runoff local drainage failure, various strategies that can be proposed. high degree vulnerability characterizes such expected increase future due effects climate change, growth population living cities, densification. An increasing awareness socio-economic losses environmental impact flooding clearly reflected recent expansion number studies related sometimes within framework adaptation change. goal current paper provide general review advances flood-risk management, while exploring perspectives fields research.

Language: Английский

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A multi-disciplinary analysis of the exceptional flood event of July 2021 in central Europe – Part 1: Event description and analysis

Natural hazards and earth system sciences, Journal Year: 2023, Volume and Issue: 23(2), P. 525 - 551

Published: Feb. 6, 2023

Abstract. The July 2021 flood in central Europe was one of the five costliest disasters last half century, with an estimated total damage EUR 32 billion. aim this study is to analyze and assess within interdisciplinary approach along its entire process chain: synoptic setting atmospheric pressure fields, processes causing high rainfall totals, extraordinary streamflows water levels affected catchments, hydro-morphological effects, impacts on infrastructure society. In addition, we address question what measures are possible generate added value early response management immediate aftermath a disaster. superposition several factors resulted widespread extreme precipitation totals well beyond 100-year event: slow propagation low system Bernd, convection embedded mesoscale field, unusually moist air masses associated significant positive anomaly sea surface temperature over Baltic Sea, wet soils, steep terrain catchments. Various hydro-morphodynamic as changes valley morphology observed during event exacerbated impact flood. Relevant effects included, among many others, occurrence landscape erosion, rapidly evolving erosion scour channel network urban space, recruitment debris from natural landscape, deposition clogging bottlenecks eventual collapse. estimation inundation areas derived assessments were carried out or directly after show potential near-real-time forensic disaster analyses for crisis management, emergency personnel on-site, provision relief supplies. This part two-paper series. second (Ludwig et al., 2022) puts into historical context climate change.

Language: Английский

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Hydrology as a Driver of Floating River Plastic Transport

Earth s Future, Journal Year: 2022, Volume and Issue: 10(8)

Published: July 12, 2022

Abstract Plastic pollution in aquatic ecosystems is a growing threat to ecosystem health and human livelihood. Recent studies show that the majority of environmental plastics accumulate within river systems for years, decades potentially even longer. Long‐term system‐scale observations are key improve understanding transport retention dynamics, identify sources sinks, assess potential risks. The goal this study was quantify explain variation floating plastic Rhine‐Meuse delta, using novel 1‐year observational data set. We found strong positive correlations between discharge. During peak discharge events, up six times higher than under normal conditions. varied factor four along Rhine Meuse rivers, which hypothesized be related complex network, locations urban areas, tidal dynamics. Altogether, our findings demonstrate important role hydrology as driving force Our emphasizes need exploring other factors may spatiotemporal transport. world's most polluted rivers connected ocean through deltas. Providing reliable data‐driven insights dynamics optimize prevention reduction strategies. With paper we aim contribute both advancing fundamental establishment long‐term harmonized collection at basin scale.

Language: Английский

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Effects of sediment transport on flood hazards: Lessons learned and remaining challenges

Geomorphology, Journal Year: 2023, Volume and Issue: 446, P. 108976 - 108976

Published: Nov. 20, 2023

Sediment transport (bedload and suspension) plays a relevant role in the morphological response of river channels to large floods. load controls erosion aggradation patterns during high flows, drives migration macroforms contributes definition thresholds for bank channel instability. Given this influence on morphology, it is clear that sediment influences both geometry water stage reached floods should therefore be considered flood hazard analysis. So far, however, legislation management plans still continues typically disregard transport. This due mainly paucity available data lack standardized approaches its integration into The present work, which aims provide some guidance how advance issue, has undertaken bibliometric study thorough review published scientific literature had previously addressed implications hazards assessment. showed that: i) most studies risk have focused mountain streams, as they are highly sensitive systems changes supply; ii) research also explaining historical channel-conveyance capacity frequency based long-term trends iii) recent developments hydrodynamic morphodynamic numerical models opportunities explicitly incorporate However, despite advances, we identified important challenges discussed needs better consider at different spatial temporal scales.

Language: Английский

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Why wood should move in rivers

River Research and Applications, Journal Year: 2023, Volume and Issue: 40(6), P. 976 - 987

Published: Feb. 1, 2023

Abstract Large wood is inherently mobile in naturally functioning river corridors, yet management commonly introduces that anchored to limit hazards. Wood periodically mobilized important for: replacing stationary large performs diverse physical and ecological functions; contributing the disturbance regime of corridor; diversifying decay states; dispersing organisms propagules; providing refugia during floodplain inundation mobile‐bed channels; dissipating flow energy; supplying downstream environments including lakes, coastlines, open ocean, deep sea. We briefly review what known about mobility corridors suggest priorities for ongoing research management, including: structural designs can pass wood; enhancing piece diversity introduced place; quantifying mobilization transport characteristics natural managed corridors; documentation benefits mobility.

Language: Английский

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Laboratory Flume Experiments on the Formation of Spanwise Large Wood Accumulations: I. Effect on Backwater Rise

Water Resources Research, Journal Year: 2019, Volume and Issue: 55(6), P. 4854 - 4870

Published: May 23, 2019

Abstract Transported large wood (LW) in rivers may lead to accumulations at natural or artificial obstructions. The hydraulic and geomorphic conditions change due these accumulations. Backwater rise as well scour can evolve the vicinity of such an accumulation. In this first companion paper, results model tests are presented on backwater spanwise LW combination with a movable bed. findings summarized design equations allow estimation (1) characteristic volume generating primary rise, (2) effect accumulation shape bed material resulting (3) rise. Compared fixed bed, reduces open cross‐section area thus discharge capacity increase. This work improves understanding predictability formation impact obstructions (e.g., retention racks).

Language: Английский

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Reflections on the history of research on large wood in rivers

Earth Surface Processes and Landforms, Journal Year: 2020, Volume and Issue: 46(1), P. 55 - 66

Published: Jan. 24, 2020

ABSTRACT Dynamics and functions of large wood have become integral considerations in the science management river systems. Study rivers took place as monitoring fish response to wooden structures placed central United States early 20th century, but did not begin earnest until 1970s. Research has increased intensity thematic scope ever since. A wide range factors prompted these research efforts, including basic understanding stream systems, protection restoration aquatic ecosystems, environmental hazards mountain environments. adopted perspectives from ecology, geomorphology, engineering, using observational, experimental, modelling approaches. Important advances been made where practical information needs converge with institutional leadership capacities undertake multi‐pronged programmes. Case studies include ecosystem inform regulations for forest management; storage transport a component global carbon dynamics; role regions, areas affected by severe landscape disturbances, such volcanic eruptions. As field advanced, influences on processes merged streamflow sediment regimes, so form function are now viewed involving tripartite system water, sediment, wood. growing community researchers managers is extending climatic, forest, landform, social contexts previously investigated. © 2020 John Wiley & Sons, Ltd.

Language: Английский

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Towards interactive global paleogeographic maps, new reconstructions at 60, 40 and 20 Ma

Earth-Science Reviews, Journal Year: 2021, Volume and Issue: 214, P. 103508 - 103508

Published: Jan. 10, 2021

Language: Английский

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Impacts of Heavy and Persistent Precipitation on Railroad Infrastructure in July 2021: A Case Study from the Ahr Valley, Rhineland-Palatinate, Germany

Atmosphere, Journal Year: 2022, Volume and Issue: 13(7), P. 1118 - 1118

Published: July 15, 2022

In contrast to river floods, the enormous erosion potential in catchments contributes significantly extent of damage infrastructure valleys. This paper investigates impact heavy precipitation event 14–15 July 2021 on railroad Ahr valley Rhineland-Palatinate, Germany. a first step, detailed overview climatological and hydrological drivers using spatially high-resolved distribution peak discharge modeling is provided, placed broader context by comparing it past flash flood events from 1910 2016. second mapping damages along line performed aerial photographs. The revealed that bridges are weakest point during they contribute an increase modification wave through backwater effects. Since expected future, there urgent need resilience transportation this hazard answer question what magnitudes return periods should be used future sizing rail infrastructure.

Language: Английский

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