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Adie Collins

Role(s):
Senior Scientist
Sustainable Agriculture Sciences North Wyke
North Wyke
Summary:

Adie was previously Head of Water in the Soils, Agriculture and Water research team at ADAS and now works in the Sustainable Soils and Grassland Systems Department at Rothamsted Research-North Wyke. He has has worked for 21 years researching diffuse pollution from agriculture and additional sectors. His expertise specifically focuses upon soil erosion and nutrient loss, fine sediment dynamics and sediment-associated nutrient and contaminant fluxes. Much of his work has been involved with the development of tracing and fingerprinting procedures for establishing the sources of diffuse pollution (e.g. sediment, nutrients, organic waste) in river basins. Whilst he has focussed on the quantification of individual aspects of catchment pollutant budgets, looking specifically at losses from agricultural sub-sectors (e.g. grass versus arable), urban areas and point sources (farm steadings, sewage treatment works, septic tanks), his recent work has moved towards examining pollutant impacts on aquatic ecology (e.g. fish, macroinvertebrates, macrophytes, diatoms) with a view to informing targets for catchment compliance and on assessing the efficacy and cost-effectiveness of diffuse pollution mitigation options supported by water quality policy and policy instruments. Additional recent work has examined the non-intentional impacts of the Nitrate Vulnerable Zone (NVZ) Action Programme (AP) in England on phosphorus and sediment loss to watercourses and the scope for developing a suite of mandatory so-called ‘basic measures’ for controlling diffuse water pollution from agriculture under Article 11.3 of the EU Water Framework Directive (WFD). Ongoing collaborative work for Defra and the Environment Agency is developing a national screening tool for targeting agricultural mitigation measures for diffuse water pollution, assessing the technical scope for closing the gap between current agricultural pollutant emissions and existing water quality targets (e.g. for nutrients) and developing a methodology for on-farm ecological targeting of pollutant mitigation measures.

Much of Adie’s work is at the interface of high quality scientific research and national policy advice, analysis and formulation. He has considerable experience of managing large multi-partner research projects for diverse funders and possesses a sound grounding in key policy drivers and schemes for water pollution control. Some of Adie’s recent work has focussed upon supporting sediment and phosphate management for the Catchment Sensitive Farming (CSF) initiative and on assembling longer-term conventional water quality datasets for improving the evidence base available to policy teams and Catchment Officers. He has recently helped Defra re-write Cross Compliance guidance for farmers on the use of riparian buffers for diffuse pollution mitigation in response to the EU CAP Health Check. Adie is currently leading the Demonstration Test Catchment (DTC) research platform on the Hampshire Avon and Tamar rivers, as well as a national DTC project on mitigation options (e.g. buffer strips, minimum tillage, over winter stubble cover) for diffuse pollution.

Adie is an experienced speaker at local, regional, national and international meetings and conferences. He is currently Vice President of the International Commission on Continental Erosion (ICCE) of the International Association of Hydrological Sciences (IAHS), a member of the UK Committee for National and International Hydrology and Chair of the SETAC SEDAG international working committee on sediment targets for diffuse pollution policy support. Adie is a member of the National Scientific Advisory Panel for the Salmon and Trout Association. He currently collaborates with researchers and policy teams overseas, including those in Belgium, Canada, China, Denmark, Germany and the USA. In 2013, Adrian was appointed as a Visiting Professor by the Chinese Academy of Sciences (CAS) to work on diffuse sediment pollution assessment and mitigation in the upper Yangtze River basin.

Selected recent research projects Assessing the contribution of fish farms and watercress beds to the organic sediment pressures degrading fish spawning gravels in the River Itchen SAC: phase 2 (Natural England funding):

Use of a novel composite source tracing procedure to assess the contributions of fish farms and watercress beds versus septic tanks, farm slurries / manures and damaged road verges to the organic sediment degrading fish spawning gravels.

Principal Investigator February 2014 – March 2015

Opportunities and risks for farming and the environment at landscape scale – a national Sustainable Intensification Platform (SIP) (Defra funding):

Development of a landscape typology based on land use opportunities for business planning and environmental risk for agricultural land across England and Wales, identification and testing of collaborative measures for delivering sustainable intensification using socio-economic and environmental outcomes, development of a benchmarking tool for sustainable intensification for supporting information sharing between farmers.

Principal Investigator February 2014 – March 2017

Potential impacts of changing climate and land use on nutrient cycling in UK agricultural catchments in UK (NUTCAT 2050) (NERC funding):

NUTCAT 2050 aims to develop the evidence base and advance the science through experiments, observations, system analysis and model predictions (with appropriate estimation of uncertainty), with a focus on nutrient mobilization from UK agricultural catchments, in response to changes in the water cycle that are driven by predicted changes in climate and land use.

Co-investigator September 2013-

Characterisation and targeting of measures for (non-coal) polluted mine waters – impacts of contaminated sediment on ecological recovery (Defra and Coal Authority funding):

Quantification of the extent to which metal rich sediments impact upon aquatic life and thereby the potential recovery of ecological condition following the remediation of non-coal mine water discharges.

Principal Investigator June 2013- June 2016

Extending and updating the Source Apportionment GIS (SAGIS) tool (UK Water Industries Research (UKWIR) funding):

Updating SAGIS with the latest pollution inventory data including contemporaneous WIMS effluent and WQ (including for Lakes and TraCs), effluent MCERTS data, inclusion of the 2010 agricultural sector inputs for P (PSYCHIC) and N (NEAP-N), and updating of Environment Quality Standards (EQSs).

Co-investigator March 2013-March 2014

Identification of basic measures to address agriculture’s impact on water (Environment Agency funding):

Examination of WFD Article 11.3 requirements and information on the most common causes of water quality failure across England and Wales to identify basic measures that will contribute towards the achievement of WFD objectives and comparison of this list with the current regulatory ask of farmers. Proposal of a potential future set of basic measures unconstrained by current delivery mechanisms

Principal Investigator December 2012 – March 2013

Tracing sources of particulate organic matter and phosphate degrading the River Camel valley SSSI, SW England (Natural England funding):

Fingerprinting the sources of particulate organic matter (farm manures/slurries, damaged road verges, septic systems, instream decaying vegetation) using composite signatures and of phosphate using the δ18O-PO4 approach.

Principal Investigator November 2012 – March 2013

Apportioning sources of particulate organic matter degrading the River Axe Special Area of Conservation (SAC), SW England (Natural England funding):

Source tracing for the particulate organic matter degrading the River Axe SAC to guide the targeting of remedial actions. Preliminary assessment of sediment oxygen demand (SOD) in the designated river channel to establish a baseline against which to measure future environmental outcomes. 

Principal Investigator November 2012 – March 2013

Assessing runoff and sediment loss from deep, shallow and minimum tillage techniques (Natural England FATI (Farm Advice, Training and Information Framework) funding):

Experimental testing of runoff and sediment loss from unbounded erosion plots for cereals and maize in the Dorset Frome and Hampshire Avon catchments using a dual-signature particle tracking approach, plus monitoring of soil compaction / soil structure / surface capping and crop development associated with the different tillage methods.

Principal Investigator September 2012 – April 2013

Removing information barriers to tackling diffuse water pollution impacts on sites of Special Scientific Interest (Natural England funding):

Comprehensive review of the availability and use of DWP data that has a practical application at the catchment level and design of a simple evidence framework for supporting DWP Plan local delivery for designated sites.

Principal Investigator September 2012 – March 2013

Tracing the key sources of sediment stress degrading the River Lugg SSSI (Natural England funding):

Source apportionment of the contemporary and longer-term inorganic and organic sediment stress degrading the River Lugg SSSI, including the application of compound specific stable isotopes to assess inputs from specific risky crops.

Principal Investigator September 2012 – March 2013

Assessing catchment source contributions to the inorganic and organic components of sediment stress in rivers of the Norfolk Broads (Natural England funding):

Application of a revised source tracing procedure for assessing the key sources of inorganic and organic siltation stress degrading the fluvial habitats of the Rivers Bure, Ant and Muckfleet for the purpose of supporting targeted intervention.

Principal Investigator September 2012 – March 2013

Assessing the contribution of fish farms and watercress beds to the organic sediment pressures degrading fish spawning gravels in the River Itchen SAC (Natural England funding):

Use of a novel composite source tracing procedure to assess the contributions of fish farms and watercress beds versus septic tanks, farm slurries / manures and damaged road verges to the organic sediment degrading fish spawning gravels.

Principal Investigator September 2012 – March 2013

Understanding the science evidence needs of Catchment Sensitive Farming Officers (Environment Agency Funding):

Collaboration with social scientists to elicit the scientific evidence needs of CSFOs addressing the diffuse water pollution from agriculture problem across England and Wales and provision of recommendations for further scientific work to underpin river catchment management targeting on-farm mitigation.

Co-investigator July 2012 – January 2013

Testing integrated diffuse pollution mitigation measures for arable cropping, livestock, dairy and other farming systems (Defra FFG funding):

Experimental testing and assessment of the costs of diffuse pollution mitigation measures at sub-catchment scale in the context of productive and competitive farming, as part of the Demonstration Test Catchment project.

Principal Investigator July 2012 – March 2017

Assessment of national scale sediment and phosphorus delivery to river channels across England and Wales using the PSYCHIC model (Forestry Commission (Forest Research) funding):

Updating the national PSYCHIC prediction layers of sediment and phosphorus delivery to all rivers across England and Wales using agricultural census returns for the year 2010 to support the targeted application of new woodland planting grants for farmers for supporting the delivery of Water Framework Directive water quality targets.

Co-investigator July 2012 – September 2012

Competitive maize cultivation with reduced environmental impact (Defra FFG funding):

Review of the current knowledge of strip tillage and practice in the UK and the effects of climate change on alternative management techniques. Experiments assessing a range of maize production techniques and their implications for soil erosion and diffuse pollution, effects on biodiversity, a cost benefit analysis, risk assessment and analysis of GHG losses.

Principal Investigator January 2012- December 2014

Developing a field tool kit for ecological targeting of agricultural diffuse pollution mitigation measures (Defra funding):

Development of a national cross sector screening tool for pollutant loads, concentrations and effects of mitigation for identifying WFD waterbodies and lakes where diffuse agricultural pollution mitigation measures are likely to improve ecological status, assessment of ecological sensitivity, resilience and recovery and development of a field tool kit for targeting ecologically relevant on-farm mitigation.

Principal Investigator October 2011- March 2014

Provision of sediment policy support for phase 3 of CSF (EA CSF monitoring budget funding):

Application of repeat source apportionment assessments in paired control and manipulated target sub-catchments to asses the efficacy of on-farm intervention for controlling sediment and organic (farm slurry and manure) pressures on watercourses at landscape scale.

Principal Investigator October 2011- March 2013

River Thames catchment sediment source identification and analysis (Environment Agency funding):

Assessment of the principal cross sector sources of contemporary sediment in the River Evenlode, Loddon, Ray and Shalbourne sub-catchments using a tracing procedure incorporating geochemical and radiometric fingerprints.

Principal Investigator October 2011 – May 2012

River Test CSF priority catchment sediment source assessment (Environment Agency funding):

Application of a refined composite source tracing procedure to apportion tributary sub-catchment spatial sediment sources for informing the targeting of on-farm intervention.

Principal Investigator October 2011 – May 2012

Western Rother catchment sediment management (Environment Agency funding):

Assessment of longer-term and contemporary contributions to sediment stress, Sediment Oxygen Demand (SOD) and high resolution particle tracking on arable fields, for informing improved catchment mitigation strategy planning.

Principal Investigator October 2011 – May 2012

The River Mease SSSI/SAC (Natural England funding):

Catchment scale assessment of the primary sources of sediment and phosphate stress responsible for the unfavourable condition of the River Mease SSSI/SAC for helping to target on-farm interventions and alternative cross sector mitigation options.

Principal Investigator October 2011- May 2012

Rivers Trust Web GIS pilot (Rivers Trust funding): 

Further development of a web GIS tool for providing access to catchment attribute and modelling data layers for helping to inform the delivery of the Water Framework Directive (WFD) by Rivers Trust staff.

Co-investigator August 2011 –January 2012

Developing knowledge exchange approaches to secure sustained behaviour changes to deliver multiple environmental benefits through sustainable agricultural land management (Defra funding):

Delivery of effective knowledge exchange to support integrated catchment management focusing on sustainable agriculture and development of practical guidance on developing Communities of Practice concerned with management for healthy rivers.

Co-investigator December 2010 – November 2012

Assessing the status of drainage in UK agriculture: a case study in the Demonstration Test Catchments (Defra funding).

Survey of farmer practices, attitudes towards, and understanding of role of, under-drainage in wider environmental issues in the three Demonstration Test Catchments (Avon, Wensum, Eden). Use of targeted on-farm surveys of drainage presence and condition to update existing GIS layers for informing diffuse water pollution policy support models.

July 2010 – February 2013

Source apportioning fine sediment degrading the Bere Stream SSSI (Environment Agency funding):

Assessment of the key sources of fine sediment (agriculture, damaged road verges, channel banks, watercress farming, urban areas) degrading a SSSI using a revised tracing procedure incorporating both local and global optimisation techniques for mass balance modelling.

Principal Investigator February 2010 – April 2010

Establishing the Hampshire Avon Demonstration Test Catchment (Defra FFG funding):

Design, implementation and maintenance of high resolution multi-pollutant and ecological monitoring in the Hampshire Avon Demonstration Test Catchment for the purpose of assembling empirical water quality evidence to test the hypothesis that it is possible to reduce, cost effectively, the impact of agricultural diffuse water pollution (DWPA) on ecological function while maintaining food security through the implementation of multiple on-farm measures.

Principal Investigator December 2009 – March 2014

Developing the evidence base on riparian buffer strips and other options for sediment loss from agriculture (Defra FFG funding):

Assessment of the efficacy of agri-environment riparian buffers for sediment trapping and phosphorus retention, analysis of the biodiversity value of buffer features of contrasting ages and deployment of a novel sediment sourcing framework to assess the efficacy of additional sediment mitigation options in the three Defra / EA Demonstration Test Catchments (Hampshire Avon, Wensum and Eden).

Principal Investigator December 2009 – March 2012

Scoping study to develop a monitoring programme for the outcomes of Uplands ELS (Defra ELM funding):

Review of approaches for recording the uptake of the scheme, the attitudes of farmers towards the scheme, the impact of the scheme on the natural and managed environment and, the factors affecting and preventing further adoption.

Co-investigator October 2009 – May 2010

Extending the evidence base on the ecological impacts of fine sediment and developing a framework for targeting mitigation of agricultural sediment losses (Defra FFG funding):

Collection of new empirical and experimental data on the impacts of fine sediment loss from agriculture on fish and macroinvertebrates. Delivery of a generic modelling framework for coupling sediment pressures (past, present and future) and ecological condition for supporting the management of catchment sediment pressures.

Principal Investigator July 2009 – March 2012

Developing guidance for farmers on the installation of riparian buffer strips (Defra ELM funding):

Development of guidance for farmers on the installation of riparian buffers for inclusion in Cross Compliance documentation and testing on 20 farms across England using one-to-one interviews.

Principal Investigator June 2009 - September 2009

Southern Rockies Watershed Project (Canada National Science and Engineering Research Council, Canada Foundation for Innovation, Alberta Environment, Canada Department of Fisheries and Oceans, Oldman Watershed Council, Alberta Conservation Association, Alberta Ingenuity – Centre for Water Research, Alberta Sustainable Resource Development (Fish and Wildlife) funding):

Evaluation of the effects of wildfire disturbance on hydrology, water quality, aquatic ecology and recovery in headwater catchments in the southern Rockies using seven fully instrumented research sub-catchments (three burned, two burned with salvage logging and two control).  Upscaling to examine the potential impacts of headwater catchment wildfire disturbance on downstream drinking water reservoir supplies for the city of Calgary.

Collaborator June 2009 -

Agri-environment monitoring and services contract Lot 3 (Welsh Assembly Government funding):

Use of a combination of modelled pollutant pressures and empirical ecological data (macroinvertebrates) to assemble the evidence base for justifying future funding and policy development with respect to Welsh agri-environmental schemes (Tir Cynnal, Tir Gofal and the Organic Farming Scheme). Coupled pollutant pressure – ecological impact work compared farms in and out of agri-environment schemes for providing environment monitoring of habitats, species populations and high level ecosystems with respect to the 2007-2013 Rural Development Plan (RDP).

Principal Investigator April 2009 – March 2012

Quantification of recent fine sediment sources in the River Axe ECSFDI priority catchment (Environment Agency funding):

Application of a revised sediment sourcing procedure for assembling catchment scale information on the key sources of bed and floodplain samples (pasture and arable topsoils, damaged road verges and channel banks/subsurface sources) using a revised numerical mixing model incorporating four permutations of uncertainty analysis.

Principal Investigator January 2009 – August 2009

Reconstructing recent historical sources of fine sediment and particulate phosphorus in Chew Valley Lake (Environment Agency funding):

Reconstruction of recent historical sediment and particulate phosphorus sources for Chew Valley Lake, south-west UK.  The work was principally designed to provide the CSFO with sediment and particulate phosphorus source data to help target advice and mitigation planning, but some attention also focused on palaeoenvironmental reconstruction with respect to the eutrophication problem using diatom data. 

Principal Investigator January 2009 – April 2009

Developing a sediment management framework (Environment Agency funding):

Development of a Relative Risk Model (RRM) to assess the probability of impacts of a variety of potential sediment stressors in a spatially-explicit manner.  The RRM was structured on the basis of the Drivers-Pressures-State-Impact-Responses (DPSIR) framework proposed by the European Environment Agency. The RRM uses data on land use, hydrology, the distribution of assessment endpoints and the history of disturbance to derive measures of risk gradients within those catchment systems being managed.  Calculations are based on a process of setting ranks for a broad range of sources, stressors and habitats with filters to characterise exposure and effects.  The proposed model can be applied to any catchment in England and Wales.

Co-investigator November 2008 – August 2009

Riparian buffer strip width criteria to offset the loss of set-aside (Defra ELM funding):

Review of buffer strip efficacy for sediment, phosphorus, nitrogen, nitrate, pesticide and FIO pollution and development of generic guidelines for farmers on buffer strip installation. 

Principal Investigator

November 2008 – March 2009

High resolution sediment sourcing (Natural England funding):

Trialling of a new high resolution sediment sourcing framework combining generic fingerprinting and a dual signature tracking technique in the Glaven ECSFDI priority catchment, Norfolk.  The novel framework was used to assess the relative sediment inputs to river channels from poached banks versus areas of natural fluvial scour, as well as from wheelings versus inter-wheeling areas on arable fields.

Principal Investigator November 2008 – May 2009

Piloting a common framework for targeting and assessing the efficacy of User Manual sediment mitigation options (Defra FFG and Salmon and Trout Association funding):

Trialling of a novel framework combining conventional sediment fingerprinting and a dual signature particle tracking method to provide higher resolution information on sediment loss (poached gateways, cattle tracks and wider areas of poaching damaged) from grassland systems and for assessing the efficacy of a 6 m riparian buffer.

Principal Investigator November 2008 – May 2009

Provision of sediment policy support for phase 2 of ECSFDI (EA ECSFDI monitoring budget funding):

Continuation of suspended sediment flux monitoring in the Dorset Frome ECSFDI priority catchment; trialling of a new catchment sediment sourcing framework to provide higher resolution information for supporting the targeting of mitigation options.

Principal Investigator October 2008 – September 2009

Use of the NIT18 infrastructure for multi-pollutant monitoring (Defra funding):

Augmentation of Nitrate Vulnerable Zone (NVZ) monitoring to assess phosphorus and sediment export from selected catchments within NVZ’s and evaluation in the context of pollution swapping, sediment pressures, eutrophication and catchment management. Quantitative assessment of the national scale non-intentional effect of NVZ Action Programme measures on phosphorus and sediment emissions to water.

Principal Investigator July 2008 – April 2011

Cross-sector source apportionment of sediment and particulate phosphorus in the Somerset Levels ECSFDI priority catchment (EU Blue Knot funding):

Establishing the contributions from agricultural top soils, damaged road verges, channel banks and STW’s for assisting the targeting of mitigation options.

Principal Investigator October 2007 – May 2008

The significance of roads as a sediment source in the Hampshire Avon ECSFDI priority catchment (EA ECSFDI monitoring budget funding):

Investigation of the importance of damaged road verges versus agricultural top soils and eroding channel banks for the purpose of assisting the targeting of mitigation options.

Principal Investigator January 2007- March 2008

Sediment fluxes and sources in the Dorset Frome ECSFDI priority catchment (EA ECSFDI monitoring budget funding):

Targeting of sediment mitigation methods in the priority sub-catchments identified by the CSFO.

Principal Investigator January 2007- March 2008

Sediment gap analysis to meet WFD (Defra CSF funding):

Evaluation of the magnitude of the gap between current and target suspended sediment loads required to meet ‘good ecological status’ as defined by the annual average critical suspended sediment threshold concentration of 25 ppm for salmonids.

Principal Investigator June – December 2006

Characterisation of phosphorus and sediment pressures in 20 ECSFDI priority catchments (Defra, EN, RDS and EA funding):

Use of the PSYCHIC model to characterise sediment and P pressures for the purpose of assisting the targeting of mitigation options by the CSFO’s.

Co-investigator March – September 2006

Multi-agency (Defra, EN, RDS and EA funding) Catchment Sensitive Farming pilot delivery initiative (PSYCHIC four catchments study):

Application of the PSYCHIC model to the Avon, Wensum, Teme and Derwent-Cocker catchments, UK, for the purpose of predicting P and sediment mobilisation and delivery and the potential benefits of employing mitigation options.

Co-investigator September 2005 – March 2006

EU Euroharp project (EU and Defra matched funding):

A multi-partner programme comparing the performance of nine diffuse pollution models in various pre-selected catchments spanning from northern to southern Europe.

Co-investigator August 2005- March 2006

NERC LOCAR (LOwland Catchment Research) programme:

Investigation of the fine sediment budgets of lowland permeable catchments in the UK (Frome/Piddle, Tern, Pang/Lambourn) and their implications for nutrient and pesticide transfer and fate.

Co-investigator July 2002- September 2006

Defra PSYCHIC (Phosphorus and Sediment Yield Characterisation In Catchments) project:

Development and validation of a risk assessment and decision making support tool to control diffuse loads of phosphorus and particulates from agricultural land.

Co-investigator November 2001-March 2005

EA funded project investigating the sources of fines infiltrating and silting salmonid spawning gravels in England and Wales,

With the specific target of identifying regional variations in the most suitable mitigation options.

Co-investigator April 2001 - November 2001

 

Phone:
+44 (0) 1837 883 500 ext: +44 1837 883515
Location:
Rothamsted Research - North Wyke, Okehampton, Devon, EX20 2SB
Past Projects
Project Leader
  • Transfer of ecological field kit
  • River Itchen source fingerprinting -phase 2
  • Application of the ASPIRE Generic Sediment Modelling Framework to protected sites
  • Scaling up the benefits of field scale soil protection measures to understand their impact at the landscape scale
  • Establishment of a Demonstration Test Catchment (DTC) in the Hampshire Avon and Tamar catchments WQ0211 - Phase 2
  • CSF Extension
  • *SIFT-sediment fingerprinting tool
  • Defra - Expert input into modelling platform
  • Economics of effective but unpopular farming measures
Member
  • Potential for nitrification inhibitors and fertilizer nitrogen application timing strategies to reduce nitrous oxide emissions from UK agriculture
  • The North Wyke Farm Platform
  • Case studies for ammonia measures
  • *Grassland Ecosystem Tool (GEST)

Selected publications

McGonigle, D.F., Burke, S.P., Collins, A.L., Gartner, R., Haft, M.R., Harris, R.C., Haygarth, P.M., Hedges, M.C., Hiscock, K.M. and Lovett, A.A. (2014). Developing Demonstration Test Catchments as a platform for transdisciplinary land management research in England Wales. Environmental Science: Processes and Impacts.

Whitehead P.G, Jin, L., Crossman, J., Comber, S., Johnes, P.J., Daldorph, P. Collins, A.L., Butterfield, D., Bardon, R., Pope, L.,Willows R., Flynn, N. (2014). Distributed and dynamic modelling of hydrology, phosphorus and ecology in the Hampshire Avon and Blashford Lakes: evaluating alternative strategies to meet WFD standards. Science of the Total Environment 481, 157-166.

Jones, J.I., Duerdoth, C.P., Collins, A.L., Naden, P.S. and Sear, D.A. (2014). Interactions between diatoms and fine sediment. Hydrological Processes 28, 1226-1237.

Allen, D.J., Darling, W.G., Davies, J., Newell, A.J., Gooddy, D.C. and Collins, A.L. (2014). Groundwater conceptual models: implications for evaluating diffuse pollution mitigation measures. Quarterly Journal of Engineering Geology and Hydrogeology 47, 65-80.

Sear, D.A., Pattison, I., Collins, A.L., Newson, M.D., Jones, J.I., Naden, P.S. and Carling, P.A. (2014). Factors controlling the temporal variability in dissolved oxygen regime of salmon spawning gravels. Hydrological Processes 28, 86-103.  

Stone, M., Collins, A.L., Silins, U., Emelko, M.B. and Zhang, Y.S. (2014). The use of composite fingerprints to quantify sediment sources in a wildfire impacted landscape, Alberta, Canada. Science of the Total Environment 473-474, 642-650.

Gooday, R.D., Anthony, S.G., Chadwick, D.R., Newell-Price, P., Harris, D., Deuthmann, D., Fish, R., Collins, A.L. and Winter, M. (2014). Modelling the cost-effectiveness of mitigation methods for multiple pollutants at farm scale. Science of the Total Environment 468-469, 1198-1209.

Collins, A.L., Stutter, M. and Kronvang, B. (2014). Mitigating diffuse pollution from agriculture: international approaches and experience. Science of the Total Environment 468-469, 1173-1177.

Roberts, W.M., Matthews, R.A., Blackwell, M.S.A., Peukert, S., Collins, A.L., Stutter, M.I., Haygarth, P.M. (2013). Microbial biomass phosphorus contributions to phosphorus solubility in riparian vegetated buffer strip soils. Biology and Fertility of Soils 49, 1237-1241.

Collins, A.L. Williams, L.J., Zhang, Y.S., Marius, M., Dungait, J.A.J. Smallman, D.J., Dixon, E.R., Stringfellow, A., Sear, D.A., Jones, J.I. and Naden, P.S. (2013). Catchment source contributions to the sediment-bound organic matter degrading salmonid spawning gravels in a lowland river, southern England. Science of the Total Environment 456-457, 181-195.

Critchley, C.N.R., Mole, A.C., Towers, J. and Collins, A.L. (2013). Assessing the potential value of riparian buffer strips for biodiversity. Aspects of Applied Biology 118, 101-108.

Collins, A.L., Zhang, Y.S., Duethmann, D., Walling, D.E. and Black, K.S. (2013). Using a novel tracing-tracking framework to source fine-grained sediment loss to watercourses at sub-catchment scale. Hydrological Processes 27, 959-974.

Collins, A.L., Zhang, Y., Hickinbotham, R., Bailey, G., Darlington, S., Grenfell, S.E., Evans, R. and Blackwell, M. (2013). Contemporary fine-grained bed sediment sources across the River Wensum Demonstration Test Catchment, UK. Hydrological Processes 27, 857-884.

Jones, J.I., Murphy, J.F., Collins, A.L., Sear, D.A. and Naden, P.S. (2012). The impact of fine sediment on macro-invertebrates. River Research and Applications 28, 1055-1071.

Jones, J.I., Collins, A.L., Naden, P.S, and Sear, D.A. (2012). The relationship between fine sediment and macrophytes in rivers. River Research and Applications 28, 1006-1018. 

Zhang, Y., Collins, A.L. and Gooday, R.D. (2012). Application of the FARMSCOPER tool for assessing agricultural diffuse pollution mitigation methods across the Hampshire Avon Demonstration Test Catchment, UK. Environmental Science and Policy 24, 120-131.

Collins, A.L., Golosov, V., Horowitz, A.J., Lu, X., Stone, M., Walling, D.E. and Zhang, X. (eds.) (2012). Erosion and sediment yields in the changing environment. International Association of Hydrological Sciences (IAHS) Publication No. 356, Wallingford, UK, 451 pp. 

Zhang, Y., Collins, A.L. and Williams, J. (2012). Dynamics of sediment delivery in drain flow on clay soils across England and Wales. In: Erosion and sediment yields in the changing environment (pp 91-97). International Association of Hydrological Sciences (IAHS) Publication No. 356, Wallingford, UK, 451 pp. 

Collins, A.L., Foster, I., Zhang, Y., Gooday, R., Lee, D., Sear, D., Naden, P. and Jones, I. (2012). Assessing ‘modern background sediment delivery to rivers’ across England and Wales and its use for catchment management. In: Erosion and sediment yields in the changing environment (pp 125-131). International Association of Hydrological Sciences (IAHS) Publication No. 356, Wallingford, UK, 451 pp.

Collins, A.L., Zhang, Y., Walling, D.E., Grenfell, S.E., Smith, P., Grischeff, J., Locke, A., Sweetapple, A. and Brogden, D. (2012). Quantifying fine-grained sediment sources in the River Axe catchment, southwest England: application of a Monte Carlo numerical modelling framework incorporating local and genetic algorithm optimisation. Hydrological Processes 26, 1962-1983.

Allin, D., Stone, M., Silins, U., Emelko, M. and Collins, A.L. (2012). The effects of wildfire on sediment-associated phosphorus forms in the Crowsnest River basin, Alberta, Canada. In: Wildfire and water quality: processes, impacts and challenges (pp 1-8). International Association of Hydrological Sciences (IAHS) Publication No 354, Wallingford, UK, 123 pp. 

Stone, M., Collins, A., Thoms, M. (eds.) (2012). Wildfire and water quality: processes, impacts and challenges. International Association of Hydrological Sciences (IAHS) Publication No 354, Wallingford, UK, 123 pp. 

Zhang, Y.S., Collins, A.L. and Horowitz, A.J. (2012). A preliminary assessment of the spatial sources of contemporary suspended sediment in the Ohio River basin, United States, using water quality data from the NASQAN programme in a source tracing procedure. Hydrological Processes 26, 326-334.

Collins, A.L., Zhang, Y., McChesney, D., Walling, D.E., Haley, S.M. and Smith, P. (2012). Sediment source tracing in a lowland agricultural catchment in southern England using a modified procedure combining statistical analysis and numerical modelling.  Science of the Total Environment 414, 301-317.

Kemp, P., Sear, D., Collins, A., Naden, P. and Jones, I. (2011). The impacts of fine sediment on riverine fish. Hydrological Processes 25, 1800-1821.

Collins, A.L. Naden, P.S., Sear, D.A., Jones, J.I., Foster, I.D.L. and Morrow, K. (2011). Sediment targets for informing river catchment management: international experience and prospects. Hydrological Processes 25, 2112-2129.

Foster, I.D.L., Collins, A.L., Naden, P.S., Sear, D.A., Jones, J.I. and Zhang, Y. (2011). The potential for palaeolimnology to determine historic sediment delivery to rivers. Journal of Paleolimnology 45, 287-306.

Collins, A.L., Zhang, Y., Walling, D.E., Grenfell, S.E. and Smith, P. (2010). Tracing sediment loss from eroding farm tracks using a geochemical fingerprinting procedure combining local and genetic algorithm optimisation. Science of the Total Environment 408, 5461-5471.

Collins, A.L., Walling, D.E., Stroud, R.W., Robson, M. and Peet, L.M. (2010). Assessing damaged road verges as a suspended sediment source in the Hampshire Avon catchment, southern United Kingdom. Hydrological Processes 24, 1106-1122.

Zhang, Y., Collins, A.L., Horowitz, A.J. (2010). Tracing spatial sources of suspended sediment in the Ohio River basin, USA, using water quality data from the NASQAN programme. In: Sediment dynamics for a changing future (pp 291-299). International Association of Hydrological Sciences Publication No. 337, Wallingford, UK.

Collins, A.L., Zhang, Y., Walling, D.E. and Black, K. (2010). Apportioning sediment sources in a grassland dominated agricultural catchment in the UK using a new tracing framework. In: Sediment dynamics for a changing future (pp 68-75). International Association of Hydrological Sciences Publication No. 337, Wallingford, UK.

Collins, A.L., Walling, D.E., McMellin, G.K., Zhang, Y., Gray, J., McGonigle, D., Cherrington, R. (2010). A preliminary investigation of the efficacy of riparian fencing schemes for reducing contributions from eroding channel banks to the siltation of salmonid spawning gravels across the south west UK.  Journal of Environmental Management 91, 1341-1349.

Collins, A.L., Walling, D.E., Webb, L. and King, P. (2010). Apportioning catchment scale sediment sources using a modified composite fingerprinting technique incorporating property weightings and prior information. Geoderma 155, 249-261.

Collins, A.L., Walling, D.E., McMellin, G.K., Zhang, Y., Gray, J., McGonigle, D.F., Cherrington, R. (2010). The efficacy of stream fencing for reducing sediment inputs from eroding channel banks to salmonid spawning gravels at catchment scale. In: Crighton, K. and Audsley, R. (eds) Climate, water and soil: science, policy and practice (pp 83-88), Proceedings of the SAC and SEPA Biennial Conference, Edinburgh, 2010.

Collins, A.L., Anthony, S.G., Hawley, J. and Turner, T. (2009). The potential impact of projected change in farming by 2015 on the importance of the agricultural sector as a sediment source in England and Wales. Catena 79, 243-250.

Collins, A.L., Hughes, G., Zhang, Y. and Whitehead, J. (2009). Mitigating diffuse water pollution from agriculture: riparian buffer strip performance with width. CAB Reviews: Perspectives in Agriculture, Veterinary Science, Nutrition and Natural Resources 4, No. 039.

Collins, A.L., Walling, D.E., Webb, L. and King, P. (2009). Particulate organic carbon sources and delivery to river channels in the Somerset Levels ECSFDI priority catchment, southwest UK. International Journal of River Basin Management 7, 277-291.

Anthony, S.A., Silgram, M., Collins, A.L. and Fawcett, L.E. (2009). EveNFlow: catchment river water quality modelling for policy support. International Journal of River Basin Management 7, 259-275.

Collins, A.L. and Davison, P.S. (2009). Mitigating sediment delivery to watercourses during the salmonid spawning season: potential effects of delayed wheelings and cover crops in a chalk catchment, southern England. International Journal of River Basin Management 7, 209-220.

Collins, A.L., McGonigle, D.F., Evans, R., Zhang, Y., Duethmann, D. and Gooday, R. (2009). Emerging priorities in the management of diffuse pollution at catchment scale. International Journal of River Basin Management 7, 179-185.

Collins, A.L. (ed.) (2009). Recent progress in understanding and managing diffuse pollution at catchment scale. International Journal of River Basin Management 7, pp 292.

Collins, A.L., Anthony, S.G., Hawley, J. and Turner, T. (2009). Predicting potential change in agricultural sediment inputs to rivers across England and Wales by 2015. Marine and Freshwater Research 60, 626-637.

Ballantine, D.J., Walling, D.E., Collins, A.L. and Leeks, G.J.L. (2009). The content and storage of phosphorus in fine-grained channel bed sediment in contrasting lowland agricultural catchments in the UK. Geoderma 151, 141-149.

Silgram, M., Anthony, S.G., Collins, A.L., Stromqvist, J., Bouraoui, F., Schoumans, O., Lo Porto, A., Groenendijk, P., Arheimer, B., Ejhed, H., Mimikou, M. and Johnsson, H. (2009). Evaluation of diffuse pollution model applications in EUROHARP catchments with limited data. Journal of Environmental Monitoring 11, 554-571.

Collins, A.L. and Anthony, S.G. (2008). Predicting sediment inputs to aquatic ecosystems across England and Wales due to current environmental conditions. Applied Geography 28, 281-294.

Ballantine, D.J., Walling, D.E., Collins, A.L. and Leeks, G.J.L. (2008). The phosphorus content of fluvial suspended sediment in three lowland groundwater-dominated catchments. Journal of Hydrology 357, 140-151.

Collins, A.L., Walling, D.E. and Peet, L. (2008). Identifying gravel siltation sources. Salmo Trutta 11, 26-28.

Collins, A.L. and Anthony, S.G. (2008). Assessing the likelihood of catchments across England and Wales meeting ‘good ecological status’ due to sediment contributions from agricultural sources. Environmental Science and Policy 11, 163-170.

Walling, D.E. and Collins, A.L. (2008). The catchment sediment budget as a management tool. Environmental Science and Policy 11, 136-143.

Collins, A.L. and McGonigle, D.F. (2008). Monitoring and modelling diffuse pollution from agriculture for policy support: UK and European experience. Environmental Science and Policy 11, 97-101.

Collins, A.L. (ed.) (2008). Monitoring and modelling diffuse pollution from agriculture for policy support: UK and European experience. Environmental Science and Policy 11.

Stromqvist, J., Collins, A.L., Davison, P.S., and Lord, E.I. (2008). PSYCHIC – a process-based model of phosphorus and sediment transfers within agricultural catchments. Part 2. A preliminary evaluation. Journal of Hydrology 350, 303-316.

Walling, D.E., Collins, A.L. and Stroud, R. (2008). Tracing suspended sediment and particulate phosphorus sources in catchments. Journal of Hydrology 350, 274-289.

Davison, P.S., Anthony, S.G., Collins, A.L. and Stromqvist, J. (2007). Predicting phosphorus transfers within agricultural catchments across England and Wales using the PSYCHIC model. In: Heckrath, G., Rubaek, G.H. and Kronvang, B. (eds) Diffuse phosphorus loss: risk assessment, mitigation options and ecological effects in river basins (pp 219-221), Proceedings of the 5th International Phosphorus Workshop, Silkeborg, Denmark.

Collins, A.L., Stromqvist, J., Davison, P.S. and Lord, E.I. (2007). Appraisal of phosphorus and sediment transfer in three pilot areas identified for the Catchment Sensitive Farming initiative in England: application of the prototype PSYCHIC model. Soil Use and Management 23, 117-132.

Collins, A.L., Anthony, S.G., Turner, T. and Hawley, J. (2007). Predicting the impact of projected change in agriculture by 2015 on annual mean fluvial suspended sediment concentrations across England and Wales. In: Water Quality and sediment behaviour of the future: predictions for the 21st century (pp 28-37), International Association of Hydrological Sciences Publication No. 314, Wallingford, UK.

Collins, A.L. and Walling, D.E. (2007). Sources of fine sediment recovered from the channel bed of lowland groundwater-fed catchments in the UK. Geomorphology 88, 120-138.

Collins, A.L. and Davison, P.S. (2007). Unblocking the redds: mitigating sediment delivery to watercourses during the salmonid spawning season. Salmo Trutta 10, 53-55.

Collins, A.L. and Walling, D.E. (2007). The storage and provenance of fine sediment on the channel bed of two contrasting lowland permeable catchments, UK. River Research and Applications 23, 429-450.

Collins, A.L. and Walling, D.E. (2007). Fine-grained bed sediment storage within the main channel systems of the Frome and Piddle catchments, Dorset, UK. Hydrological Processes 21, 1448-1459.

Ballantine, D.J., Walling, D.E., Collins, A.L. and Leeks, G.J.L. (2006). Phosphorus storage in fine channel bed sediments. Water Air and Soil Pollution: Focus 6, 371-380.

Walling, D.E., Collins, A.L., Jones, P.A., Leeks, G.J.L. and Old, G. (2006). Establishing the fine-grained sediment budgets of the Pang and Lambourn LOCAR study catchments. Journal of Hydrology 330, 126-141.

Collins, A.L. and Walling, D.E. (2006). Investigation of the remobilization of fine sediment stored on the channel bed of lowland permeable catchments in the UK. In: Sediment dynamics and the hydromorphology of the fluvial system (pp 471-479), International Association of Hydrological Sciences Publication No. 306, Wallingford, UK.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (2005). Storage of fine-grained sediment and associated contaminants within the channels of lowland permeable catchments in the UK. In: Sediment Budgets 1 (pp 259-268), International Association of Hydrological Sciences Publication No. 291, Wallingford, UK.

Walling, D.E. and Collins, A.L. (2005). Suspended sediment sources in British rivers. In: Sediment Budgets 1 (pp 123-133), International Association of Hydrological Sciences Publication No. 291, Wallingford, UK.

Collins, A.L. and Walling, D.E. (2004). Documenting catchment suspended sediment sources: problems, approaches and prospects. Progress in Physical Geography 28, 159-196.

Walling, D.E., Collins, A.L. and Sichingabula, H.M. (2003). Use of reconnaissance measurements to establish catchment sediment budgets: a Zambian example. In: Erosion Prediction in Ungauged River Basins: Integrating Methods and Techniques (pp 3-12), International Association of Hydrological Sciences Publication No. 279, Wallingford, UK.

Walling, D.E., Collins, A.L. and McMellin, G. (2003). A reconnaissance survey of the source of interstitial fine sediment recovered from salmonid spawning gravels in England and Wales. Hydrobiologia 497, 91-108.

Walling, D.E., Collins, A.L. and Sichingabula, H.M. (2003). Using unsupported lead-210 measurements to investigate soil erosion and sediment delivery in a small Zambian catchment. Geomorphology 52, 193-213.

Collins, A.L. and Walling, D.E. (2002). Selecting fingerprint properties for discriminating potential suspended sediment sources in river basins. Journal of Hydrology 261, 218-244.

Walling, D.E., Collins, A.L., Sichingabula, H.M. and Leeks, G.J.L. (2001). Integrated assessment of catchment suspended sediment budgets: a Zambian example. Land Degradation and Development 12, 387-415.

Collins, A.L., Walling, D.E., Sichingabula, H.M. and Leeks, G.J.L. (2001). Using 137Cs measurements to quantify soil erosion and redistribution rates for areas under different land use in the Upper Kaleya River basin, southern Zambia. Geoderma 104, 299-323.

Collins, A.L., Walling, D.E., Sichingabula, H.M. and Leeks, G.J.L. (2001). Suspended sediment source fingerprinting in a small tropical catchment and some management implications. Applied Geography 21, 387-412.

Walling, D.E. and Collins, A.L. (2000). Integrated Assessment of Catchment Suspended Sediment Budgets: A Technical Manual. University of Exeter, 168 pp.

Sichingabula, H.M., Walling, D.E., Collins, A.L. and Leeks, G.J.L. (2000). Magnitude-frequency characteristics of suspended sediment fluxes in the Upper Kaleya catchment, southern Zambia. In: Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments (pp 99-113), Zambia Educational Publishing House (ISBN 9982-01-107-3).

Sichingabula, H.M., Collins, A.L., Walling, D.E. and Leeks, G.J.L. (2000). Measuring suspended sediment fluxes and yields from river basins. In: Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments (pp 24-47), Zambia Educational Publishing House (ISBN 9982-01-107-3).

Collins, A.L., Walling, D.E., Sichingabula, H.M. and Leeks, G.J.L. (2000). Using the caesium-137 technique to quantify soil erosion and deposition on cultivated and uncultivated land. In: Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments (pp 71-98), Zambia Educational Publishing House (ISBN 9982-01-107-3).

Collins, A.L., Walling, D.E., Sichingabula, H.M. and Leeks, G.J.L. (2000). Determining catchment suspended sediment sources using the fingerprinting approach. In: Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments (pp 48-70), Zambia Educational Publishing House (ISBN 9982-01-107-3).

Collins, A.L., Walling, D.E., Sichingabula, H.M. and Leeks, G.J.L. (2000). Catchment suspended sediment budgets: an integrated approach. In: Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments (pp 12-23), Zambia Educational Publishing House (ISBN 9982-01-107-3).

Sichingabula, H.M., Walling, D.E. and Collins, A.L. (eds) (2000). Dynamics of Erosion, Sediment Transport and Sedimentation in Small Catchments. Zambia Educational Publishing House (ISBN 9982-01-107-3), 165 pp.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1998). Use of composite fingerprints to determine the spatial provenance of the contemporary suspended sediment load transported by rivers. Earth Surface Processes and Landforms, 23: 31-52.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1997). Using the geochemical record preserved in floodplain deposits to reconstruct recent changes in river basin sediment sources. Geomorphology 19, 151-167.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1997). Sediment sources in the Upper Severn catchment: a fingerprinting approach. Hydrology and Earth System Sciences, 1: 509-521.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1997). Fingerprinting the origin of fluvial suspended sediment in larger river basins: combining assessment of spatial provenance and source type. Geografiska Annaler, 79A: 239-254.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1997). Source type ascription for fluvial suspended sediment based on a quantitative composite fingerprinting technique. Catena, 29: 1-27.

Collins, A.L., Walling, D.E. and Leeks, G.J.L. (1996). Composite fingerprinting of the spatial source of fluvial suspended sediment: a case study of the Exe and Severn River basins, United Kingdom. Geomorphologie, Relief, Processus, Environnement, 2: 41-54.