Professor Nicholas J K Howden

Research Output

Research Output per year

2004 2020

• 65 Article (Academic Journal)
• 30 Conference Contribution (Conference Proceeding)
• 4 Conference Poster
• 3 Commissioned report
• 8 More
  • 3 Conference Paper
  • 1 Chapter in a book
  • 1 Conference Abstract
  • 1 Comment/debate (Academic Journal)
  • 1 Editorial (Academic Journal)
  • 1 Other contribution

Research Output per year

Research Output per year

Search results

• 2014

  Contextualized geographically weighted principal components analysis for investigating baseline soils data on the North Wyke Farm Platform

  Harris, P., Howden, N. J. K., Peukert, S., Noacco, V., Ramezani, K., Tuominen, E., Eludoyin, B., Brazier, R., Shepherd, A., Griffith, B., Orr, R. & Murray, P., 2014, Proceedings of the 16th International Association for Mathematical Geosciences - Geostatistical and Geospatial Approaches for the Characterization of Natural Resources in the Environment: Challenges, Processes and Strategies, IAMG 2014. Capital Publishing Company, p. 376-378 3 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

  • farm
  • principal component analysis
  • catchment
  • soil
  • field survey
• 2011

  A model of long-term catchment-scale nitrate transport in a UK Chalk catchment

  Howden, NJK., Mathias, SA., Whelan, MJ., Burt, TP. & Worrall, F., 2011, Groundwater: Our source of security in an uncertain future; CSIR Convention Centre, Pretoria, South Africa.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• DOC fluxes from the UK – up to 194 monitoring sites over 125 years and from 0.1 km2 to 10000 km2

  Turner, EK., Worrall, F., Howden, NJK. & Burt, TP., 2011, AGU Fall Meeting.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• DOC fluxes from the UK – up to 237 monitoring sites over 125 years

  Worrall, F., Howden, NJK. & Burt, TP., 2011, Gordon Research Conference: Catchment Science: Interactions of Hydrology, Biology & Geochemistry.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Identifying short- and long-term change in catchment biogeochemical function

  Howden, NJK., Burt, TP. & Worrall, F., 2011, Gordon Research Conference: Catchment Science: Interactions of Hydrology, Biology & Geochemistry.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Nitrate concentrations and fluxes in the River Thames, London UK 1868 to 2008: catchment-scale modelling of diffuse agricultural sources and groundwater response using the world’s longest water quality time series

  Howden, NJK., Burt, TP., Worrall, F., Mathias, SA. & Whelan, MJ., 2011, AGU Fall Meeting.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Nitrate concentrations and fluxes in the River Thames, London UK 1868 to 2008: exploratory analysis of the world’s longest water quality time series

  Howden, NJK., Bieroza, MZ., Burt, TP. & Worrall, F., 2011, European Geophysical Union, Vienna.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The fluvial flux of dissolved nitrogen from the UK: amounts, controls and prognosis

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2011, European Geophysical Union, Vienna.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The terrestrial nitrogen budget of the Thames catchment, UK

  Dixon, S., Worrall, F., Howden, NJK., Burt, TP. & Whelan, MJ., 2011, AGU Fall Meeting.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The total nitrogen budget of the UK - amount, controls and prognosis

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2011, AGU Fall Meeting.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)
• 2010

  A 125 year long record of DOC flux from a major temperate catchment

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2010, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• A model of long-term catchment-scale nitrate transport in a UK Chalk catchment

  Howden, NJK., Mathias, SA., Burt, TP., Worrall, F., Whelan, MJ. & Bieroza, MZ., 2010, BHS Third International Simposium 2010, Newcastle.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Long-term DOC export from UK peatlands

  Howden, NJK., Worrall, F. & Burt, TP., 2010, 1st International Water Quality Conference, Leeds UK.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Nitrate trends in United Kingdom watersheds since 1868: can we reverse the trend?

  Burt, TP., Howden, NJK. & Worrall, F., 2010, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Non-stationarity in long hydrological time series: a new theoretical technique for detecting multiple changes in mean and variance

  Howden, NJK., Burt, TP., Worrall, F. & Bieroza, MZ., 2010, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Predicting long-term catchment nutrient export: the use of nonlinear time series models

  Valent, P., Howden, NJK., Szolgay, J. & Komornikova, M., 2010, European Geophysical Union, Vienna.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The use of very long term water quality records from the UK: gaining perspective on problems of nitrate and DOC

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2010, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The value and importance of long-term water quality monitoring

  Howden, NJK., Burt, TP., Worrall, F. & Whelan, MJ., 2010, Monitoring and data evaluation under the Water Framework Directive – Achievements, deficits and new horizons, Luxembourg.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)
• 2009

  Fluvial fluxes of nitrogen from Great Britain 1974–2005 in the context of the terrestrial nitrogen budget of Great Britain

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2009, Biogeomon 6, Helsinki. 2009 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Spatial and temporal aspects of catchment-scale nitrate transport

  Howden, NJK., Burt, TP., Worrall, F. & Whelan, MJ., 2009, British Society for Geomorphology.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The terrestrial nitrogen budget of the United Kingdom

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2009, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• What is the prognosis of nitrogen losses from UK soils?

  Worrall, F., Burt, TP., Howden, NJK. & Whelan, MJ., 2009, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)
• 2008

  Nitrate concentrations in the River Frome at East Stoke, Dorset, 1965 to 2004

  Burt, TP. & Howden, NJK., 2008, British Society for Geomorphology National Conference, Exeter.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Spatial and temporal trends in nitrate concentrations in Dorset Chalk streams

  Howden, NJK. & Burt, TP., 2008, British Hydrological Society 10th National Hydrology Symposium, Exeter.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Spatio-temporal trends in Nitrate concentrations in groundwater-dominated Chalk streams, Dorset (UK)

  Howden, NJK. & Burt, TP., 2008, International Association of Hydrogeologists, XXXVIth International Conference, Toyama Japan.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• The Fluvial Flux of Nitrogen from Great Britain 1974 to 2005 in the context of the terrestrial nitrogen budget of Great Britain

  Howden, NJK., Worrall, F., Burt, TP. & Whelan, MJ., 2008, American Geophysical Union Fall Meeting.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)
• 2007

  Coastal Squeeze: a pilot study of potential climate change impacts on groundwater-dependent coastal ecosystems in Suffolk, UK

  Howden, NJK., Humphries, RN., Humphries, CEL., Meade, R. & Morris, R., 2007, XXXV IAH Congress “Groundwater and Ecosystems”, Lisbon Portugal.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Surface/groundwater interactions: identifying spatial controls on water quality and quantity in a lowland UK Chalk catchment

  Howden, NJK., Wheater, HS., Peach, DW. & Butler, AP., 2007, XXXV IAH Congress “Groundwater and Ecosystems”, Lisbon Portugal.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)
• 2004

  Hydrogeological controls on surface/ groundwater interactions in a lowland permeable Chalk catchment

  Howden, NJK., Wheater, HS., Peach, DW. & Butler, AP., 2004, BHS2004: Hydrology: Science & Practice for the 21st Century.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

• Surface Water – Groundwater Interactions Research in Chalk catchments: UK Lowland Catchment Research Programme (LOCAR)

  Peach, DW., Wheater, HS., Howden, NJK., Bloomfield, J. & Gallagher, A., 2004, American Geophysical Union (AGU), San Francisco.

  Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)