A5001902129- Hydrology and Sediment Transport Processes
- Oceanographic and Atmospheric Processes
- Geological formations and processes
- Coastal wetland ecosystem dynamics
- Coastal and Marine Dynamics
- Aquatic Ecosystems and Phytoplankton Dynamics
- Aeolian processes and effects
- Fish Ecology and Management Studies
- Soil erosion and sediment transport
- Marine and coastal ecosystems
- Flood Risk Assessment and Management
- Marine and coastal plant biology
- Anaerobic Digestion and Biogas Production
- Hydrology and Watershed Management Studies
- Water-Energy-Food Nexus Studies
- Wind Energy Research and Development
- Ocean Waves and Remote Sensing
- Freshwater macroinvertebrate diversity and ecology
- Aquatic Invertebrate Ecology and Behavior
- Water resources management and optimization
- Wastewater Treatment and Nitrogen Removal
- Statistics Education and Methodologies
- Geology and Paleoclimatology Research
- Phosphorus and nutrient management
- Coastal and Marine Management
Lancaster University
2014-2024
Lancaster University Ghana
2007-2016
University of Hull
2015
University of Palermo
2007
University of Dundee
1994-2001
University of Strathclyde
1997-2000
University of Lisbon
1997
The hydrodynamics of simulated patches the Mediterranean seagrass Posidonia oceanica were studied in laboratory flume experiments which height pronated canopy was always greater than half total water depth. effects variations speed (from 0.08 m s™1 to 0.24 s™1) and patch configuration on investigated. Significant speeds penetrated approximately their height. Reducing did not change flow patterns observed, except weaken blur them. Flow encountering a single formed turbulent wake at top...
Abstract The urgency to mitigate the effects of climate change necessitates an unprecedented global deployment offshore renewable-energy technologies mainly including wind, tidal stream, wave energy, and floating solar photovoltaic. To achieve energy demand for terawatt-hours, infrastructure such will require a large spatial footprint. Accommodating this footprint rapid landscape evolution, ideally within two decades. For instance, United Kingdom has committed deploying 50 GW wind by 2030...
Floating solar photovoltaic (FPV) deployments are increasing globally as the switch to renewable energy intensifies, representing a considerable water surface transformation. FPV installations can potentially impact aquatic ecosystem function, either positively or negatively. However, these impacts poorly resolved given challenges of collecting empirical data for field modelling experiments. In particular, there is limited evidence on response phytoplankton changes in body thermal dynamics...
A laboratory flume experiment was performed to investigate the time development of scour around a vertical cylinder acting as scaled model an offshore wind turbine monopile in tidal currents. The current simulated by resolving each half-cycle into three steps, between which flow velocity and depth were varied. Flow direction reversed half-cycles, otherwise identical. Between them, steps exhibited clear water, transitional, live-bed conditions. run over two full-simulated cycles. hole formed...
Abstract Climate change is already having profound impacts upon the state and dynamics of lake ecosystems globally. A specific concern that climate will continue to promote growth phytoplankton, particularly blooms toxic cyanobacteria, via physical processes including warming surface waters shallowing mixed layer. These two mechanisms have different on phytoplankton communities, but their inter‐connectedness has made it difficult disentangle independent effects. We fill this knowledge gap by...
Wetlands serve as coastal protection structures via hydrological and biogeochemical processes (Junk et al., 2013), preventing soil erosion (Barcelona 2018) promoting sedimentation stabilization (Montakhab 2012).  Wetlands contribute to mitigate the impacts of peak flows caused by pluvial or fluvial floods storm surges. The increase in global warming will affect areas with an sea level erosive (Reed 2018), frequency hydrometeorological phenomena such flooding maritime storms (Hoggart...
Satellite image sequences (covering periods of a few days throughout the annual cycle) waters off southern Iberia have been analyzed in conjunction with concurrent surface wind speed data from coastal stations. Qualitative analysis reveals large degree temporal and spatial variability thermal signature sea over both several months. During summer, cool seasurface temperature extends western Iberian coast around Cape St. Vincent eastward as far Faro. At same time, warm originating on between...
1. Sediment distributions within lakes are typically heterogeneous. Much of our understanding comes from the study large and/or shallow lakes, where wave mixing is dominant sediment focussing mechanism. 2. We elucidated heterogeneity surface distribution in a small lake, Esthwaite Water (U.K.). considered multiple mechanisms (downslope gravitational transport, waves, and wind-driven currents) their effect on variables (water content, organic total phosphorus benthic diatom taxon richness)....
Turbulent flow characteristics were investigated in laboratory flume studies of a ligulate plant canopy interrupted by gap representing discontinuities observed seagrass prairies. The reliability velocity measurements obtained using an acoustic Doppler velocimeter within the was shown specifically designed experiments. In relatively fast (mean 5.5cms−1), mean profile logarithmic above canopy, had inflection point near its top, and uniformly low values it. Within gap, recirculation cell...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 516:49-59 (2014) - DOI: https://doi.org/10.3354/meps10873 Comparison of influence patch-scale and meadow-scale characteristics on flow within seagrass meadows: a flume study A. Adhitya1,5,*, T. J. Bouma1, M. Folkard2, van Katwijk3, D. Callaghan4, H. de Iongh5, P. Herman1 1Royal Netherlands Institute for Sea...
Abstract Many landscapes are characterized by a patchy, rather than homogeneous, distribution of vegetation. Often this patchiness is composed single‐species patches with contrasting traits, interacting each other. To date, it unknown whether different species affect other's uptake resources altering hydrodynamic conditions, and how depends on their spatial patch configuration. Patches two aquatic macrophyte (i.e., dense canopy‐forming Callitriche sparse Groenlandia ) were grown together in...
Abstract This study focused on determining the effect of inoculum to substrate ratio (ISR) biogas production efficiency from anaerobic co-digestion two substrates: synthetic food waste and common reeds ( Phragmites australis ) that were ground pre-treated using sodium hydroxide at a concentration 2% increase access their cellulose. It also studied role different mixing ratios substrates in improving stability digestion process increasing production. A series batch tests carried out under...
Abstract Renewable energy sources, such as floating photovoltaic systems (FPVs), are crucial to mitigating the climate crisis. FPV deployments on freshwater bodies rapidly growing, they avert land-use change, operate with increased efficiency, and potentially improve water availability by reducing evaporation frequency of algal blooms. However, understanding ecological consequences for is very limited despite variable far-reaching range potential impacts. Here, we bring novel insight...
We assessed the value of applying random forest analysis (RF) to relating metrics deforestation (DF) and fragmentation (FF) socioeconomic (SE) biogeophysical (BGP) factors, in Brazilian Atlantic Forest Minas Gerais, Brazil. A vegetation-monitoring project provided land cover maps, from which we derived DF FF metrics. An ecologic-economical zoning more than 300 SE BGP factors. used RF identify relationships between these sets variables compared its performance this task that a traditional...
A flume experiment was carried out to improve understanding of interactions between turbidity currents and aquatic vegetation canopies their landscape-scale consequences. It focussed on comparing hydrodynamics sediment deposition in continuous with those patches, the effects varying water depth – both which are previously unreported. The currents' particulate load characterised as a mix fine coarse fractions. Varying canopy frontal densities, a, depths, H, were used. Fifteen runs fully...
Abstract A laboratory flume experiment was carried out in which the hydrodynamic and sedimentary behaviour of a turbidity current measured as it passed through an array vertical rigid cylinders. The cylinders were intended primarily to simulate aquatic vegetation canopies, but could equally be taken represent other arrays obstacles, for example forests or offshore wind turbines. currents generated by mixing naturally sourced, poly‐disperse sediment into reservoir water at concentrations from...