A5021293352- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Water Quality and Pollution Assessment
- Marine and coastal ecosystems
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Soil erosion and sediment transport
- Groundwater and Isotope Geochemistry
- Phosphorus and nutrient management
- Microbial Community Ecology and Physiology
- Wastewater Treatment and Nitrogen Removal
- Isotope Analysis in Ecology
- Water resources management and optimization
- Hydrology and Sediment Transport Processes
- Peatlands and Wetlands Ecology
- Hydrological Forecasting Using AI
- Environmental Science and Water Management
- Coastal wetland ecosystem dynamics
- Integrated Water Resources Management
- Soil Carbon and Nitrogen Dynamics
- Water Quality Monitoring Technologies
- Water Quality Monitoring and Analysis
- Geology and Paleoclimatology Research
- Freshwater macroinvertebrate diversity and ecology
- Ecology and biodiversity studies
University of Bristol
2015-2024
Cabot (United States)
2003-2017
Lancaster University
2017
Queen Mary University of London
2017
Rothamsted Research
2017
University of Southampton
2014
University of Reading
1999-2013
University of Liverpool
1992-1996
Nutrient additions to intensive agricultural systems range from inadequate excessive—and both extremes have substantial human and environmental costs.
A large proportion of nutrients and sediment is mobilised in catchments during storm events. Therefore understanding a catchment's hydrological behaviour storms how this acts to mobilise transport nearby watercourses extremely important for effective catchment management. The expansion available in-situ sensors allowing wider range water quality parameters be monitored at higher temporal resolution, meaning that the investigation hydrochemical behaviours increasingly feasible. Studying...
Export coefficient modelling was used to model the impact of agriculture on nitrogen and phosphorus loading surface waters two contrasting agricultural catchments. The originally developed for Windrush catchment where highly reactive Jurassic limestone aquifer underlying is well connected drainage network, allowing system be modelled using uniform export coefficients each nutrient source in catchment, regardless proximity network. In Slapton hydrological pathways are dominated by lateral...
1. Nutrient concentrations (particularly N and P) determine the extent to which water bodies are or may become eutrophic. Direct determination of nutrient content on a wide scale is labour intensive but main sources P well known. This paper describes tests an export coefficient model for prediction total from: (i) land use, stock headage human population; (ii) rates from these sources; (iii) river discharge. Such might be used forecast effects changes in use future hindcast past quality...
Phosphorus losses from land to water will be impacted by climate change and management for food production, with detrimental impacts on aquatic ecosystems. Here we use a unique combination of methods evaluate the impact projected future phosphorus transfers, assess what scale agricultural would needed mitigate these transfers. We combine novel high-frequency flux data three representative catchments across UK, new high-spatial resolution model, uncertainty estimates an ensemble simulations,...
Abstract. Analysis of hydrochemical behaviour during storm events can provide new insights into the process controls on nutrient transport in catchments. The examination behaviours using hysteresis analysis has increased recent years, partly due to availability high temporal resolution data sets for discharge and water quality parameters. A number these analyses involve use an index describe characteristics a loop order compare both within between This technical note reviews methods...
Abstract. Benchmarking model performance across large samples of catchments is useful to guide selection and future development. Given uncertainties in the observational data we use drive evaluate hydrological models, structure parameterisation models produce simulations predictions, it essential that evaluation undertaken within an uncertainty analysis framework. Here, benchmark capability several lumped Great Britain by focusing on daily flow peak simulation. Four structures from Framework...
Abstract. This paper uses high-frequency bankside measurements from three catchments selected as part of the UK government-funded Demonstration Test Catchments (DTC) project. We compare hydrological and hydrochemical patterns during water year 2011–2012 Wylye tributary River Avon with mixed land use, Blackwater Wensum arable use Newby Beck Eden grassland use. The beginning was unusually dry all were in states drought. A sudden change to a wet summer occurred April 2012 when heavy rainfall...
The roles of nitrogen (N) and phosphorus (P) as key nutrients determining the trophic status water bodies are examined, evidence reviewed for trends in concentrations N P species which occur freshwaters, primarily northern temperate environments. Data reported undergoing eutrophication acidification, especially receiving increased inputs through atmospheric deposition oxides (NOx). Nutrient loading on groundwaters surface freshwaters is assessed with respect to causes rates change, relative...
The contribution from agricultural catchments to stream nitrogen and phosphorus concentrations was assessed by evaluation of the chemical composition these nutrients in runoff for both surface subsurface flow pathways. A range land uses (grazed ungrazed grassland, cereals, roots) intensive systems studied at scales hillslope plots (0.5 m2) large catchment (>300 km2). By fractionating total nutrient load it possible establish that most transported unreactive (particulate organic) fraction via...