A5070383563- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Coastal and Marine Dynamics
- Coastal wetland ecosystem dynamics
- Soil erosion and sediment transport
- Peatlands and Wetlands Ecology
- Geological formations and processes
- Groundwater flow and contamination studies
- Constructed Wetlands for Wastewater Treatment
- Aquatic and Environmental Studies
- Hydrology and Sediment Transport Processes
- Wastewater Treatment and Nitrogen Removal
- Healthcare Systems and Challenges
- Phosphorus and nutrient management
- Groundwater and Isotope Geochemistry
- Soil and Unsaturated Flow
- Global Cancer Incidence and Screening
- Soil Geostatistics and Mapping
- Marine and fisheries research
- Nanofluid Flow and Heat Transfer
- Groundwater and Watershed Analysis
- Soil Carbon and Nitrogen Dynamics
- Environmental and Sediment Control
- Lattice Boltzmann Simulation Studies
- Fractional Differential Equations Solutions
Lancaster University
2011-2018
HR Wallingford
1991-1996
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,...
We hypothesise that climate change, together with intensive agricultural systems, will increase the transfer of pollutants from land to water and impact on stream health. This study builds, for first time, an integrated assessment nutrient transfers, bringing a) high-frequency data outlets two surface water-dominated, headwater (~ 10 km2) catchments, b) event-by-event analysis c) concentration duration curves comparison EU Water Framework Directive quality targets, d) event...
Intensification of agriculture has resulted in increased soil degradation and erosion, with associated pollution surface waters. Small field wetlands, constructed along runoff pathways, offer one option for slowing down storing order to allow more time sedimentation nutrients be taken up by plants or micro-organisms. This paper describes research provide quantitative evidence the effectiveness small wetlands UK landscape. Ten were built on four farms Cumbria Leicestershire, UK. Annual...
There is a need to model and predict the transfer of phosphorus (P) from land water, but this challenging because large number complex physical biogeochemical processes involved. This study presents, for first time, 'limits acceptability' approach Generalized Likelihood Uncertainty Estimation (GLUE) framework Soil Water Assessment Tool (SWAT), in an application water quality problem Newby Beck catchment (12.5 km2), Cumbria, United Kingdom (UK). Using high frequency outlet data (discharge P),...
Core Ideas Climate change effects on the P transfer continuum are examined. export and eutrophication will likely increase under a changing climate. catchment processing complex poorly understood. Modeling of flows buffering is needed to inform management. Research should consider climate each tier continuum. Phosphorus inputs agriculture their fate in environment contribute poor water quality degradation linked ecosystem services at great cost society. alter forms timings fluxes from land...
Mass transport, such as movement of phosphorus in soils and solutes rivers, is a natural phenomenon its study plays an important role science engineering. It found that there are numerous practical diffusion phenomena do not obey the classical advection-diffusion equation (ADE). Such called abnormal or superdiffusion, it well described using fractional (FADE). The FADE finds wide range applications various areas with great potential for studying complex mass transport real hydrological...
Abstract River discharge and nutrient measurements are subject to aleatory epistemic uncertainties. In this study, we present a novel method for estimating these uncertainties in colocated phosphorus (P) measurements. The “voting point”‐based constrains the derived stage‐discharge rating curve both on fit available gaugings catchment water balance. This helps reduce uncertainty beyond range of during out bank situations. example presented here, top 5% flows, shown be 139% using traditional...
Climate projections for the future indicate that United Kingdom will experience hotter, drier summers and warmer, wetter winters, bringing longer dry periods followed by rewetting. This result in changes phosphorus (P) mobilization patterns influence transfer of P from land to water. We tested hypothesis drying–rewetting affect amount soluble reactive (SRP) solubilized soil. Estimations period characteristics (duration temperature) under current predicted climate were determined using data...
Surface water quality in the UK and much of Western Europe has improved recent decades, response to better point source controls regulation fertilizer, manure slurry use. However, diffuse sources pollution, such as leaching or runoff nutrients from agricultural fields, micro-point including farmyards, heaps septic tank sewerage systems, particularly systems without soil adsorption beds, are now hypothesised contribute a significant proportion delivered surface watercourses. Tackling an...
Abstract. Excess nutrients in surface waters, such as phosphorus (P) from agriculture, result poor water quality, with adverse effects on ecological health and costs for remediation. However, understanding prediction of P transfers catchments have been limited by inadequate data over-parameterised models high uncertainty. We show that, temporal resolution data, we are able to identify simple dynamic that capture the load dynamics three contrasting agricultural UK. For a flashy catchment,...
This paper describes use of a hydro-chemical mixing model and water budget to investigate the presence deep runoff pathways in two small, nested sub-catchments Eden basin, UK (8.8 km2 Blind Beck 1.0 Low Hall stream). A linear relationship between bicarbonate concentration electrical conductivity was used two-component model. End-members were identified as high-solute, groundwater low-solute, soil-water. The indicated 69% ± 10% for September–December 2008 46% 8% same period. also more stream....