A5062848456- Soil erosion and sediment transport
- Hydrology and Sediment Transport Processes
- Geological formations and processes
- Coastal wetland ecosystem dynamics
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Environmental Conservation and Management
- Soil and Water Nutrient Dynamics
- Coastal and Marine Dynamics
- Remote Sensing and LiDAR Applications
- Marine Bivalve and Aquaculture Studies
- Marine and fisheries research
- Flood Risk Assessment and Management
- Aeolian processes and effects
- Rangeland Management and Livestock Ecology
- Geology and Paleoclimatology Research
- Geographies of human-animal interactions
- Ocean Acidification Effects and Responses
- Parasite Biology and Host Interactions
- Marine Biology and Ecology Research
- Botany and Plant Ecology Studies
- Jewish and Middle Eastern Studies
- Coastal and Marine Management
- Sustainable Development and Environmental Policy
- Archaeology and Rock Art Studies
Stellenbosch University
2020-2024
University of the Western Cape
2016-2019
Swansea University
2011-2014
University of KwaZulu-Natal
2008-2012
Agricultural Development Advisory Service (United Kingdom)
2012
Anglia Ruskin University
2012
Rhodes University
2009-2011
University of Wolverhampton
2010-2011
University of Exeter
2010-2011
ABSTRACT Marine aquaculture relies on coastal habitats that will be affected by climate change. This review assesses current knowledge of the threats and opportunities change for in UK Ireland, focusing most commonly farmed species, blue mussels ( Mytilus edulis ) Atlantic salmon Salmo salar ). There is sparse evidence to indicate affecting Ireland. Impacts date have been difficult discern from natural environmental variability, pace technological development overshadows effects climatic...
Abstract Increasing recognition of the deleterious environmental effects excessive fine sediment delivery to watercourses means that reliable source assessment represents a fundamental component catchment planning targeting protection freshwater resources and their ecological integrity. Sediment tracing or fingerprinting approaches have been increasingly used provide scale information, but there is need continue refining existing procedures especially with respect uncertainty analysis during...
Abstract Because the sources of fine‐grained sediment problems in river systems are diffuse, it is essential to assemble catchment scale information for informing management strategies. Sediment source‐tracing procedures have increasingly been adopted this respect. Accordingly, a recently refined composite tracing procedure was used investigate contemporary channel bed 11 sub‐catchments (364 km 2 ) River Wensum Demonstration Test Catchment, eastern UK. The incorporated combination...
The co-efficient of variation for inter-annual streamflow the Mfolozi River is extremely high at 79%. An analysis flow frequency indicated that skewed towards low-flow values, with a number large flood events occurring as outliers on histogram. Streamflow variability in may be linked to multiple factors including catchment size, seasonal climate dry winter and wet summer, evergreen vegetation catchment, variable precipitation occurrence regionally pervasive climatic oscillations. This...
Due to climatic constraints in dryland regions, wetlands usually occur at confluences of flow paths, whether from surface flow, inter-flow or locations groundwater discharge. Long-term landscape processes that shape valleys and focus the movement water sediment are accountable for providing a suitable template with which hydrology interacts allow wetland formation. Current hydrogeomorphic classification systems do not address system-scale linkages transport across landscape, therefore unable...
Abstract This paper investigates the origin and geomorphic evolution of Stillerust Vlei, a 189 ha wetland located approximately 150 km northwest Durban in temperate submontane foothills KwaZulu‐Natal Drakensberg Mountains. The investigation confirms findings previous research on arid to semi‐arid South African interior, which established that many floodplain wetlands eastern Africa are upstream resistant rock barriers (dolerite intrusions) cross river courses form stable local base levels....
Abstract Sediment trapping in wetlands is an essential ecosystem service, with implications for downstream ecosystems and water users. There however limited empirical evidence of the contemporary rates magnitude sediment valley‐bottom wetlands. Time‐averaged suspended samples from inlets outlets forestry‐ agriculturally‐impacted contrasting morphometric characteristics were compared terms associated total phosphorous (total P) fluxes over annual scales, a dataset that was by Covid travel...
Blocked-valley lakes are formed when tributaries impounded by the relatively rapid aggradation of a large river and its floodplain. These features common in landscape, have been identified floodplains Solimões-Amazon (Brazil) Fly-Strickland Rivers (Papua New Guinea), for example, but their inaccessibility has resulted studies being limited to remotely sensed image analysis. This paper documents sedimentology geomorphic evolution blocked-valley lake, Lake Futululu on Mfolozi River floodplain...
Zones of alluviation at tributary – trunk confluences can act as sediment storage/transfer switches. Evaluating the temporal variation in connectivity is key to understanding origin, dynamics and residence time alluvial fill sequences, determining relative interacting effects different drivers landscape development. This paper evaluates processes timescales (Prins River) (Touws a site Little Karoo, context for discussing dispersal implications interpreting response environmental change. An...
Reach-scale river restoration or environmental water allocation (EWA) exercises typically address the magnitude and temporal dynamics (frequency, duration, timing, rate of change) flows required to sustain desirable ecological conditions along a river. The role geomorphology in this process is broaden gaze beyond consider larger longer-term interactions between valley lithological structure, feed fate flow-sediment mixtures. This paper proposes integration numerical morphodynamic modelling...
Abstract This paper resolves the origin of clay hummock micro‐topography in seasonal wetlands Drakensberg Foothills, providing a review and appraisal previously‐suggested mechanisms formation context new field laboratory data. Field surveys revealed neo‐formation hummocks river channel that had been abandoned c .1984. Fresh earthworm castings were located atop protruding from inundated margins. Earthworm castings, sediment cores taken adjacent hollows, analysed for soil‐adsorbed carbon...