The relationship between climate, landscape connectivity and sediment export from mountain ranges is key to understanding the propagation of erosion signals downstream into sedimentary basins. We explore the role of connectivity in modulating the composition of sediment exported from the Frontal Cordillera of the south central Argentine Andes by comparing three adjacent and apparently similar semi‐glaciated

In gully erosion, the detached soil can be transported over long distances along the landscape. The eroded material can be redistributed and/or deposited on the soil surface along the landscape and then eventually be buried by newly eroded and deposited sediment. There can be significant variability of the soil conditions (e.g., texture and moisture content) over which the eroded material travels.

The dynamics of fluvial system evolution depend on fluvial processes and their driving forces associated with climatic variations, which affect changes in the morphology of river channels and floodplains. Neither channel slope and morphology, nor the properties of fluvial sediment have previously been considered as determinants of active braidplain widening on outwash plains (formed from valley/alpine

Burrowing into riverbanks by animals transfers sediment directly into river channels and has been hypothesised to accelerate bank erosion and promote mass failure. A field monitoring study on two UK rivers invaded by signal crayfish (Pacifastacus leniusculus) assessed the impact of burrowing on bank erosion processes. Erosion pins were installed in 17 riverbanks across a gradient of crayfish burrow

Wood flux (piece number per time interval) is a key parameter for understanding wood budgeting, determining the controlling factors, and managing flood risk in a river basin. Quantitative wood flux data is critically needed to improve the understanding of wood dynamics and estimate wood discharge in rivers. In this study, the streamside videography technique was applied to detect wood passage and measure

The western coast of India (Kachchh) has ubiquitous preservations of Quaternary carbonate deposits popularly known as “Miliolites”. Field‐based detail documentation of the nature and distribution of miliolites supported by sedimentology and SEM microtextural studies indicates that the miliolites were primarily deposited by wind as aeolinites and are termed “Primary Miliolites (PM)”. These were subsequently

Avulsion is a key process in building alluvial fans, but it is also a formidable natural hazard. Based on laboratory experiments monitored with novel high‐frequency photogrammetry, we present a new model for avulsion on widely graded gravel fans. Previous experimental studies of alluvial fans have suggested that avulsion occurs in a periodic autogenic cycle, that is thought to be mediated by the gradient

U‐Pb dating of detrital zircons (DZ) in Quaternary slope deposits (cover beds) and the examination of the surface structure of single zircon grains may allow reconstructing the provenance of their aeolian components and may help to reconstruct sedimentary palaeo‐transportation cascades. We distinguish several layers of slope deposits (cover beds), using a palaeosol‐supported sequence‐stratigraphic

Gravel‐bed rivers characteristically exhibit shallow riffles in wide sections and deeper pools where the channel becomes constricted and narrow. While rivers can adjust to changing flow and sediment supply through some combination of adjustments of channel slope, bed‐surface sorting, and channel shape, the degree to which riffle‐pools may adopt these changes in response to changing flows and sediment

Palaeoflood hydraulic modelling is essential for quantifying ‘millennial flood’ events not covered in the instrumental record. Palaeoflood modelling research has largely focused on one‐dimensional analysis for geomorphologically stable fluvial settings, because two‐dimensional analysis for dynamic alluvial settings is time‐consuming and requires a detailed representation of the past landscape. In this

Washover fans are located on small barriers in fetch‐limited micro‐tidal coastal environments in Denmark. These washover fans are formed during high‐energy storm events and we present a method to quantify their volumes and to estimate sediment exchanges between washover fans and their adjacent morphologies. We use high resolution Digital Terrain Models (DTMs) based on LiDAR data. We have delineated

Debris cover on glaciers is an important component of glacial systems as it influences climate‐glacier dynamics and thus the lifespan of glaciers. Increasing air temperatures, permafrost thaw, as well as rock faces freshly exposed by glacier downwasting in accumulation zones result in increased rockfall activity and debris input. In the ablation zone, negative mass balances result in an enhanced melt‐out

Loess gullies are the most active and changeable landform unit on the Loess Plateau of China. Under the influence of inhomogeneous internal and external forces, various gully morphologies have been identified as specific forms of asymmetrical loess gullies in the northeastern Loess Plateau. Thus, the formation mechanisms of asymmetrical gullies should be examined to better understand the gully evolution

Concentrated flow erosion in Mediterranean cultivated areas is considered a major process of land degradation. Rills and ephemeral gullies in a 6.4 ha olive orchard catchment located in an intensive commercial farm which could represent a common degradation scenario in hilly areas, were measured and compared with the sediment loads at the outlet. 4 GPS survey campaigns were done between March‐2009

In this paper the morphology of step‐pool features is analyzed using rill measurements and literature data for streams. Close‐range photogrammetry was used to carry out ground measurements on rills with step‐pool units, shaped on a plot having slope equal to 14%, 15%, 22%, 24%, and 26%. Data were used to compare the relationships between H/L, in which H is the step height and L is the step length,

Landslide susceptibility estimates are essential for reducing the risk posed by landslides to social and economic well‐being. However, estimates of landslide susceptibility depend on reliable landslide inventories whose production requires extensive field or remote sensing efforts. Further, most inventories are not updated through time and thus may not capture the influence of changes in climate and/or

Obstacle marks are instream bedforms, typically composed of an upstream frontal scour hole and a downstream sediment accumulation in the vicinity of an obstacle. Local scouring at infrastructure (e.g. bridge piers) is a well‐studied phenomenon in hydraulic engineering, while less attention is given to the time‐dependent evolution of frontal scour holes at instream boulders and their geometrical relations

Field observations on small rivers of the Amazon basin are less common due to their remote location and difficult accessibility. Here, we show through remote sensing analysis and field works, the planform evolution and riverbed topography of a small river located in the upper foreland Amazon basin, the Ichilo river. By tracking planform changes along 30 years we identified the factors that control

We use four stream segments along a wood‐rich, pool‐riffle mountain stream in the Southern Rockies of Colorado, USA to examine how spatial variations in wood load and variations in discharge during and after the snowmelt peak flow influence the magnitude of surface and subsurface transient storage. Segments range in complexity from a single channel with no large wood to an anabranching channel with

Lahars are among the most hazardous mass flow processes on earth and have caused up to 23,000 casualties in single events in the recent past. The Cotopaxi volcano, 60 km southeast of Quito, has a well‐documented history of massively destructive lahars and is a hotspot for future lahars due to (i) its ~10 km2 glacier cap, (ii) its 117‐147‐year return period of (Sub)‐Plinian eruptions and (iii) the densely

Wildfire is a landscape‐scale disturbance that changes the rate and magnitude of many earth surface processes. The impacts of fire on earth surface processes can vary substantially from place to place depending on a variety of site‐specific conditions, including topography, fire severity, regional climate, vegetation type, and soil type. This variation makes it critical to bring together scientists

Floods in small mountainous watersheds cover a wide spectrum of flow. They can range from clear water flows and hyperconcentrated flows to debris floods and debris flows, and calculation of the peak discharge is crucial for predicting and mitigating such hazards. To determine the optimal approach for discharge estimation, this study compared water flow monitoring hydrographs to investigate the performance

Lake sediments are valuable natural archives to reconstruct paleoclimate and ‐environmental changes which consist of inorganic and organic sediment compounds of allochthonous origin from the catchment and of autochthonous production in the lake. However, for robust paleo‐reconstructions it is important to develop a better understanding about sedimentation processes, the origin of inorganic and organic

Previous studies have demonstrated that riparian vegetation leads to channel transformation from a multi‐bar to a single‐thread channel planform. However, it still remains unclear how the presence of pioneer and mature vegetation affects the morphodynamics of single‐thread meandering rivers. In this study, we therefore investigated the effects of vegetation strength on the morphodynamic evolution of

Within a wave‐exposed mangrove forest, novel field observations are presented, comparing millimeter‐scale turbulent water velocity fluctuations with contemporaneous subtidal bed elevation changes. High‐resolution velocity and bed level measurements were collected from the unvegetated mudflat, at the mangrove forest fringe, and within the forest interior over multiple tidal cycles (flood‐ebb) during

A commonly‐used measure to prevent soil wind erosion is to cover the surface with gravel. Gravel can inhibit soil erosion by covering the surface directly, changing the airflow field near the surface, and sharing the shear stress of wind. Similar to other roughness elements, the protective effect of gravel on soil is usually expressed in terms of the ratio of the shear stress on the exposed soil surface

No abstract is available for this article. © 2020 John Wiley & Sons, Ltd.

Post‐fire debris flows and tailing impoundment failures destroy lives and property. These geologic hazards—and other similar processes—fall on a continuum between classic Newtonian flood analyses and geotechnical stability analyses. The US Army Corps of Engineers (USACE) is developing a Non‐Newtonian library (DebrisLib) that includes a suite of rheological and clastic approaches to hyper‐concentrated

The production of coarse sediment in mountain landscapes results mainly from the type and activity of geomorphic processes and topographic and natural conditions (e.g. vegetation cover) of these catchments. The supply of sediment from these slopes to mountain streams and the subsequent transport lead to sediment connectivity, that describes the integrated coupling state of these systems. Studies from

Tidal marsh restoration and creation is growing in popularity due to the many and diverse set of services these important ecosystems provide. However, it is unclear what conditions within constructed settings will lead to the successful establishment of tidal marsh. Here we provide documentation for widespread and rapid development of tidal freshwater wetlands for a major urban estuary as an unintended

Thick supraglacial debris layers often have an undulating, hummocky topography that influences the lateral transport of debris and meltwater and provides basins for supraglacial ponds. The role of ablation and other processes associated with supraglacial debris in giving rise to this hummocky topography is poorly understood. Characterising hummocky topography is a first step towards understanding the

Underwater dunes are a morphological feature that are explored by marine scientists and coastal engineers alike. This study presents new methodologies in order to simplify bedform identification and morphodynamic analyses. Specifically, subaqueous compound dunes are decomposed with a simple yet extensive tracking algorithm which relies on a repeated evaluation of unfiltered bed elevation profiles according

Within and beyond academia, debates around equality, diversity and inclusion (EDI) have been gathering pace. We focus on EDI and geomorphology and address four main questions: (1) why does EDI matter for geomorphology?; (2) what are the barriers to greater EDI in geomorphology?; (3) how can we address these EDI barriers?; (4) can we ensure a resilient future for geomorphology by addressing EDI? At