A5017831411- Hydrology and Sediment Transport Processes
- Geology and Paleoclimatology Research
- Soil erosion and sediment transport
- Geological formations and processes
- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Pleistocene-Era Hominins and Archaeology
- Aeolian processes and effects
- Planetary Science and Exploration
- Landslides and related hazards
- Fish Ecology and Management Studies
- Geographic Information Systems Studies
- Coastal wetland ecosystem dynamics
- Archaeology and Rock Art Studies
- Maritime and Coastal Archaeology
- Peatlands and Wetlands Ecology
- Tree-ring climate responses
- Rangeland Management and Livestock Ecology
- Geography Education and Pedagogy
- Methane Hydrates and Related Phenomena
- Cryospheric studies and observations
- Biocrusts and Microbial Ecology
- Environmental Conservation and Management
- Geographies of human-animal interactions
- Automated Road and Building Extraction
Aberystwyth University
2016-2025
University of the Witwatersrand
2000-2024
University of Wales
2004-2008
University of Wollongong
1995-2000
University of Nottingham
2000
University of Southampton
1993-1994
Abstract The Anthropocene is proposed as a new interval of geological time in which human influence on Earth and its record dominates over natural processes. A major challenge demarcating the that balance between human‐influenced processes varies spatial temporal scales owing to inherent variability both activities (as associated with culture modes development) drivers (e.g. tectonic activity sea level variation). Against this backdrop, we consider how geomorphology might contribute towards...
As the distribution and abundance of vegetation in drylands is often controlled by greater availability water along river channels, riparian has potential to influence significantly dryland form, process behaviour. This paper demonstrates how a small indigenous shrub, inland teatree (Melaleuca glomerata), influences formation maintenance anabranching channels reach ephemeral Marshall River, Northern Plains, arid central Australia. Here, characterized ridge-form anabranching, where sediment...
Wetlands are poorly documented features of many landscapes, and there is often little understanding the geomorphological controls on their origin, development characteristics. This paper addresses apparent paradox wetlands in drylands, focusing particularly geomorphology sedimentology southern Africa. Drylands characterized by high (but variable) levels aridity, reflecting low ratios between precipitation potential evapotranspiration, so can only exist where locally positive surface water...
A comparative study using quartz optically stimulated luminescence (OSL) and feldspar post-infrared infrared (post-IR IRSL) was undertaken on Quaternary fluvial sediments from an unnamed tributary of the Moopetsi River in South Africa. The aim is to assess whether post-IR IRSL signal can be used date incompletely bleached sediments. Several signals varying stimulation preheat temperatures were investigated; these IRSL225 deemed most appropriate for dating because it rapidly. equivalent dose...
Abstract The pool‐riffle sequence as an important feature of river channels was described by Leopold et al. (1964) to occur with a spacing five seven times the channel width. Subsequent work has generally confirmed this spacing, although more closely spaced pools and riffles are quoted for some in woodland basins channelized streams. Although few detailed empirical studies have been made adjustments survey 6 km reach containing over 300 New Forest, southern England indicates that despite...
ABSTRACT The ‘Anthropocene’, as used to describe the interval of recent Earth history during which humans have had an ‘overwhelming’ effect on system, is now being formally considered a possible new geological Epoch. Such time (possibly equivalent Pleistocene Epoch) requires both theoretical justification well empirical evidence preserved within record. Since record driven by geomorphological processes that produce terrestrial and near‐shore stratigraphy, geomorphology has be integral part...
Abstract Rivers provide crucial ecosystem services in water-stressed drylands. Australian dryland rivers are geomorphologically diverse, ranging from through-going, single channels to discontinuous, multi-channelled systems, yet we have limited understanding of their sensitivity future hydroclimatic changes. Here, characterise for the first time geomorphology 29 with catchments across a humid arid gradient covering >1,800,000 km 2 continental eastern and central Australia. Statistical...
Abstract Floodplain wetlands are common features of rivers in southern Africa, but they have been little studied from a geological or geomorphological perspective. Study the upper Klip River, eastern Free State, South indicates strong controls on formation alluvial meanders and associated floodplain wetlands. Along this river, pronounced abrupt changes valley width strongly linked to lithological variations. Where weakly cemented sandstone crops out, has laterally eroded bedrock carved...
Abstract Splays are common features of many rivers and deltas, forming as a result overbank flooding sediment deposition, but they have rarely been described from modern dryland settings. This paper investigates splay formation along the lower reaches ephemeral on Northern Plains arid central Australia. Here, splays vary small, lobate or tongue-shaped < 1 km long, to larger, elongate up ~ 4 supplied with rare floodwater through well-defined breaches in upper parts main channel banks. In...
Research Article| July 01, 2008 Riparian vegetation and the late Holocene development of an anabranching river: Magela Creek, northern Australia Stephen Tooth; Tooth † 1Institute Geography Earth Sciences, University Wales, Aberystwyth SY23 3DB, UK †E-mail: set@aber.ac.uk Search for other works by this author on: GSW Google Scholar John D. Jansen; Jansen 2Department Geographical Glasgow, Glasgow G12 8QQ, Gerald C. Nanson; Nanson 3School Environmental Wollongong, NSW 2522, Tom J. Coulthard;...
Fluvial deposits can provide excellent archives of early hominin activity but may be complex to interpret, especially without extensive geochronology. The Stone Age site Kalambo Falls, northern Zambia, has yielded a rich artefact record from dominantly fluvial deposits, its significance been restricted by uncertainties over formation processes and limited chronology. Our new investigations in the centre Basin have used luminescence chronology provided key insights into geomorphological...
The nature, spatial patterns and forcing mechanisms of Quaternary climatic changes across southern Africa remain unresolved contentious, principally due to the scarcity continuous robustly-dated proxy records. We present what we interpret be a broadly record late change based on optically stimulated luminescence (OSL) dating, mineral magnetic diffuse reflectance spectroscopy (DRS) analyses stacked palaeosols within an overbank alluvial succession along Modder River, central South Africa. OSL...
Rivers have an intricate relationship with the vegetation that colonizes them. Riparian plants, capable of thriving within river corridors, both respond to and influence geomorphology. Yet interactions between morphodynamics tend be context specific, making it challenging generalize findings locations. The current comprehension interaction physical processes, especially its effects on morphodynamics, still lacks clarity. This article examines numerous sources variation in plant responses to,...
Identifying reliable indicators of environmental changes is crucial for effective ecosystem management, particularly in drylands which are prone to climate change impacts. Here, we report on how integrating time-series remote sensing, advanced data science techniques, and ground-based observations identify, map, assess the sensitivity a diverse suite wetlands perturbations.&#160; We interested potential &#8216;sentinel wetlands&#8217;: natural features that highly sensitive...