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Professor Andrew Nicholas

Professor Andrew Nicholas

Professor in Physical Geography

 3338

 Amory C413

 

Amory Building, University of Exeter, Rennes Drive, Exeter, EX4 4RJ , UK

 Office hours:

Wed 9:00-10:00 & Fri 9:00-10:00

 

Overview

Andrew Nicholas completed a BSc in Geography at Leeds University after which he undertook a PhD at Exeter. Between 1994 and 1996 he spent two years as a postdoctoral Fellow at Leeds before taking up a lectureship in Physical Geography at Exeter. He received the British Geomorphology Research Group Gordon Warwick Award in 2002.

 

Broad research specialisms:

Fluvial Geomorphology and Numerical Modelling

 

 

Qualifications

BSc (Leeds),
PhD (Exeter)

Research group links

Research

Research interests

Andrew’s research interests are in fluvial geomorphology with a particular focus on river and floodplain hydraulics, bedload and suspended load transport, and fluvial landscape evolution. Methodologically, much of his work involves mathematical and numerical modelling, with a strong emphasis on the integration of theoretical and empirical approaches

Research projects

  • ‘Do floods matter? Bridging the gap between fluvial morphodynamics and alluvial architecture’. Funding: NERC. Project duration: 2010-2013.
    Further information.
  • ‘Morphodynamics and sedimentology of the tidally influenced fluvial zone’. Funding: NERC. Project duration: 2010-2013.
     Further information.
  • ‘Dynamics and deposits of braid-bars in the World’s largest rivers: processes, morphology and subsurface sedimentology’. Funding: NERC. Project duration: 2008-2011.
    Further information.
  • ‘Impacts of climate change on erosion, sediment transport and soil carbon in the UK and Europe’. Funding: NERC. Project duration: 2007-2010.
    Further information.
     

Themes addressed by recently completed research projects:

Grants:

‘Do floods matter? Bridging the gap between fluvial morphodynamics and alluvial architecture’, NERC project NE/H009108/1, 2010-2013. Role: PI. Collaborative project involving Universities of Exeter & Birmingham. £529k (£479k to Exeter).

‘Morphodynamics and sedimentology of the tidally influenced fluvial zone’, NERC project NE/H006524/1, 2010-2013. Role: CI. Collaborative project led by University of Brighton (PI: Phil Ashworth), involving Universities of Exeter, Birmingham, Leeds & Illinois. £607k (£180k to Exeter).

‘Fine sediment routing through UK catchments’, ADAS, 2009-2012. Role: PI. £24k.

‘Dynamics and deposits of braid-bars in the World’s largest rivers: processes, morphology and subsurface sedimentology’, NERC project NE/E014798/1, 2008-2011. Role: CI. Collaborative project led by University of Brighton (PI: Phil Ashworth), involving Universities of Exeter, Birmingham, Durham, Leeds & Illinois. £603k (£121k to Exeter).

‘Analysis and numerical modelling of catchment connectivity and river response to environmental forcing’, ADAS & Great Western Research, 2008-2011. Role: PI. £58k.

‘Impacts of climate change on erosion, sediment transport and soil carbon in the UK and Europe’, NERC project NE/E011713/1, 2007-2010. Role: CI. Collaborative project led by NERC Centre for Ecology & Hydrology (PI: Vicky Bell), involving Universities of Exeter & Leeds. £374k (£127k to Exeter).

‘Utilisation of off-river habitats by lowland river fishes: influences of flow regime and implications for river management’, NERC project NER/T/S/2002/00573, 2003-2006. Role: CI. Collaborative project led by University of Durham (PI: Martyn Lucas), involving the University of Exeter & Centre for Ecology & Hydrology. £195k (£74k to Exeter).

‘Evaluating the potential for using Cellular Automaton models to reconstruct temporal patterns of sediment supply resulting from environmental change’, NERC Project NER/B/S/2002/00357, 2003-2005. Role: Joint lead investigator (as CI) with Tim Quine (PI). £31k.

‘The fine sediment budgets of lowland permeable catchments and their implications for nutrient and contaminant transfer’, NERC Project NER/T/S/2001/00936, 2002-2006. Role: CI (PI: Des Walling). £388k.

‘River floodplains as suspended sediment sinks: A catchment-scale approach’. NERC Project GR3/12635, 1999-2003. Role: Joint lead investigator (as CI) with Des Walling (PI). £193k.

‘Investigating the relationships between suspended sediment transport mechanics, overbank sedimentation and 3D flow hydraulics in topographically complex floodplain environments’, NERC Project GR3/10962, 1997-2001. Role: PI. £200k.

‘Braided river computer simulation’, Royal Society, 1999-2000. Role: PI. £8k.

‘Numerical modelling of braided river dynamics, New Zealand’, Nuffield Foundation, 1997-1999. Role: PI.  £3k.

Publications

Key publications | Publications by category | Publications by year

Key publications


Nicholas AP, Quine TA (2010). Quantitative assessment of landform equifinality and palaeoenvironmental reconstruction using geomorphic models. Geomorphology, 121(3-4), 167-183.
Nicholas AP (2010). Reduced-complexity modelling of free bar morphodynamics in alluvial channels. Journal of Geophysical Research - Earth Surface, doi:10.1029/2010JF001774.
Nicholas AP, Clarke L, Quine TA (2009). A numerical modelling and experimental study of flow width dynamics on alluvial fans. Earth Surface Processes and Landforms, 34, 1985-1993.
Nicholas AP (2009). Reduced-complexity flow routing models for sinuous single-thread channels: intercomparison with a physically-based shallow-water equation model. Earth Surface Processes and Landforms, 34, 641-653.

Publications by category


Journal articles

Leyland J, Hackney C, Darby S, Parsons D, Best J, Nicholas AP, Aalto R, Lague D (In Press). Extreme flood-driven bank erosion and sediment transport on a mega-river: Direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques. Earth Surface Processes and Landforms Full text.
Darby SE, Hackney CR, Leyland J, Kummu M, Lauri H, Parsons DR, Best JL, Nicholas AP, Aalto R (In Press). Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity. Nature, 539(7628), 276-279. Abstract.  Author URL.  Full text.
Sandbach S, Nicholas AP, Ashworth P, Best J, Keevil C, Parsons D, Prokocki E, Simpson C (In Press). Hydrodynamic modeling of tidal-fluvial flows in a large river estuary. Estuarine, Coastal and Shelf Science Full text.
Schwendel A, Nicholas AP, Aalto R, Sambrook Smith G, Buckley S (In Press). Interaction between meander dynamics and floodplain heterogeneity in a large tropical sand-bed river: the Rio Beni, Bolivian Amazon. Earth Surface Processes and Landforms Full text.
Schwendel A, Nicholas AP, Aalto R, Sambrook Smith GH, Buckley S (In Press). Interaction between meander dynamics and floodplain heterogeneity in a large tropical sand-bed river: the Rio Beni, Bolivian Amazon. Earth Surface Processes and Landforms
Nicholas AP (In Press). Morphodynamic diversity of the world's largest rivers. Geology
Nicholas AP, Ashworth PJ, Sambrook Smith GH, Sandbach SD (In Press). Numerical simulation of bar and island morphodynamics in anabranching mega-rivers. Journal of Geophysical Research Full text.
Hutton CJ, Nicholas AN, Brazier RE, Nearing MA (In Press). On the effects of improved cross-section representation in 1D flow routing models applied to ephemeral rivers. Water Resources Research
Nicholas A, Aalto R, Sambrook Smith G, Schwendel A (2018). Hydrodynamic controls on alluvial ridge construction and avulsion likelihood in meandering river floodplains. Geology, 46(7), 639-642. Full text.
Strick R, Ashworth P, Sambrook Smith G, Nicholas AP, Best J, Lane S, Parsons D, Simpson C, Unsworth C, Dale J, et al (2018). Quantification of bedform dynamics and bedload sediment flux in sandy braided rivers from airborne and satellite imagery. Earth Surface Processes and Landforms Full text.
(2018). Soil microbial populations in deep floodplain soils are adapted to infrequent but regular carbon substrate addition. Soil Biology and Biochemistry, 122, 60-70. Abstract.  Full text.
(2018). The planform mobility of river channel confluences: Insights from analysis of remotely sensed imagery. Earth-Science Reviews, 176, 1-18. Abstract.  Full text.
Sambrook Smith GH, Nicholas AP, Best JL, Bull JM, Dixon SJ, Goodbred S, Sarker MH, Vardy ME (2018). The sedimentology of river confluences. Sedimentology Full text.
(2017). Analysis of fundamental physical factors influencing channel bank erosion: results for contrasting catchments in England and Wales. Environmental Earth Sciences, 76(7). Abstract.
Hackney CR, Darby SE, Parsons DR, Leyland J, Aalto R, Nicholas AP, Best JL (2017). The influence of flow discharge variations on the morphodynamics of a diffluence-confluence unit on a large river. Earth Surface Processes and Landforms, 43(2), 349-362. Full text.
Nicholas AP, Sambrook Smith GH, Amsler ML, Ashworth PJ, Best JL, Hardy RJ, Lane SN, Orfeo O, Parsonsm DR, Reesink AJH, et al (2016). The role of discharge variability in determining alluvial stratigraphy. Geology, 44(1), 3-6. Abstract.  Full text.
Hackney C, Best J, Leyland J, Darby SE, Parsons D, Aalto R, Nicholas A (2015). Modulation of outer bank erosion by slump blocks: Disentangling the protective and destructive role of failed material on the three-dimensional flow structure. Geophysical Research Letters Abstract.  Full text.
Grenfell MC, Nicholas AP, Aalto R (2014). Mediative adjustment of river dynamics: the role of chute channels in tropical sand-bed meandering rivers. Sedimentary Geology, 301, 93-106. Abstract.
Best JL, Parsons DR, Amsler ML, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, Sandbach SD, Simpson CJ, Szupiany RN, et al (2014). Scales and causes of heterogeneity in bars in a large multi-channel river: Río Paraná, Argentina. Sedimentology, 61(4), 1055-1085. Abstract.
Reesink AJH, Ashworth PJ, Sambrook Smith GH, Best JL, Parsons DR, Amsler ML, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, et al (2014). Scales and causes of heterogeneity in bars in a large multi-channel river: Río paraná, argentina. Sedimentology
(2013). Modelling the continuum of river channel patterns. Earth Surface Processes and Landforms, 38(10), 1187-1196. Abstract.
(2012). Application of a roughness-length representation to parameterize energy loss in 3-D numerical simulations of large rivers. Water Resources Research, 48(12). Abstract.
Orfeo O, Parsons DR, Reesink AJH, Sambrook Smith GH, Szupiany RN (2012). Modelling hydrodynamics in the Rio Paraná, Argentina: an evaluation and inter-comparison of reduced-complexity and physics based models applied to a large sand-bed river. Geomorphology, 169-170, 192-211. Abstract.
Nicholas AP, Sandbach SD, Ashworth PJ, Amsler ML, Best JL, Hardy RJ, Lane SN, Orfeo O, Parsons DR, Reesink AJH, et al (2012). Modelling hydrodynamics in the Rio Paraná, Argentina: an evaluation and inter-comparison of reduced-complexity and physics based models applied to a large sand-bed river. Geomorphology
Grenfell MC, Aalto RE, Nicholas AP (2011). Chute channel dynamics in large, sand-bed meandering rivers. Earth Surface Processes and Landforms Abstract.
Clarke L, Quine TA, Nicholas AP (2010). An Experimental investigation of autogenic behaviour during alluvial fan evolution. Geomorphology, 115, 278-285.
Nicholas AP, Quine TA (2010). Quantitative assessment of landform equifinality and palaeoenvironmental reconstruction using geomorphic models. Geomorphology, 121(3-4), 167-183.
Nicholas AP (2010). Reduced-complexity modelling of free bar morphodynamics in alluvial channels. Journal of Geophysical Research - Earth Surface, doi:10.1029/2010JF001774.
Nicholas AP, Clarke L, Quine TA (2009). A numerical modelling and experimental study of flow width dynamics on alluvial fans. Earth Surface Processes and Landforms, 34, 1985-1993.
Clarke L, Quine TA, Nicholas AP (2009). An experimental investigation of autogenic behaviour during alluvial fan evolution. Geomorphology, 115, 278-285.
Nicholas AP (2009). Reduced-complexity flow routing models for sinuous single-thread channels: intercomparison with a physically-based shallow-water equation model. Earth Surface Processes and Landforms, 34, 641-653.
(2007). Cellular modelling as a tool for interpreting historic braided river evolution. Geomorphology, 90(3-4), 302-317. Abstract.
Nicholas AP, Quine TA (2007). Crossing the divide: Representation of channels and processes in reduced-complexity river models at reach and landscape scales. Geomorphology, 90(3-4), 318-339.
Nicholas AP, Quine TA (2007). Modelling alluvial landform change in the absence of external environmental forcing. Geology, 35(6), 527-530.
Nicholas AP, Fang X, Sweet RJ, Walling DE (2006). Development and evaluation of a new catchment-scale model of floodplain sedimentation . Water Resources Research, 42(10).
Walling, D.E. Sweet, R.J. Fang, X. (2006). New strategies for upscaling high-resolution flow and overbank sedimentation models to quantify floodplain sediment storage at the catchment scale. Journal of Hydrology, 329(3-4), 577-594.
(2005). Cellular modelling in fluvial geomorphology. Earth Surface Processes and Landforms, 30(5), 645-649. Abstract.
Sambrook-Smith, G.H. (2005). Effect on flow structure of sand deposition on a gravel bed: results from a two-dimensional flume experiment. Water Resources Research, 41(10), 1-12.
Nicholas AP, McLelland SJ (2004). Computational fluid dynamics modelling of three-dimensional processes on natural river floodplains. Journal of Hydraulic Research, 42(2), 131-143.
(2003). Investigation of spatially distributed braided river flows using a two-dimensional hydraulic model. Earth Surface Processes and Landforms, 28(6), 655-674. Abstract.
(2003). Numerical simulation of overbank processes in topographically complex floodplain environments. Hydrological Processes, 17(4), 727-746. Abstract.
(2003). Tillage erosion intensity in the South Canterbury Downlands, New Zealand. Australian Journal of Soil Research, 41(4), 789-807. Abstract.
Thomas, R. (2002). Simulation of braided river flow using a new cellular routing scheme. Geomorphology, 43(3-4), 179-195.
(2001). Computational fluid dynamics modelling of boundary roughness in gravel-bed rivers: an investigation of the effects of random variability in bed elevation. Earth Surface Processes and Landforms, 26(4), 345-362. Abstract.
(2000). A new method for evaluating errors in high-frequency ADV measurements. Hydrological Processes, 14(2), 351-366. Abstract.
(2000). Modelling bedload yield braided gravel bed rivers. Geomorphology, 36(1-2), 89-106. Abstract.
(1999). Numerical simulation of three-dimensional flow hydraulics in a braided channel. Hydrological Processes, 13(6), 913-929. Abstract.
(1998). Numerical modelling of floodplain hydraulics and suspended sediment transport and deposition. Hydrological Processes, 12(8), 1339-1355. Abstract.
Nicholas AP, Smith GHS (1998). Relationships between flow hydraulics, sediment supply, bedload transport and channel stability in the proglacial Virkisa River, Iceland. GEOGRAFISKA ANNALER SERIES A-PHYSICAL GEOGRAPHY, 80A(2), 111-122. Author URL.
(1998). Relationships between flow hydraulics, sediment supply, bedload transport and channel stability in the proglacial Virkisa River, Iceland. Geografiska Annaler, Series A: Physical Geography, 80(2), 111-122. Abstract.
(1997). Investigating spatial patterns of medium-term overbank sedimentation on floodplains: a combined numerical modelling and radiocaesium-based approach. Geomorphology, 19(1-2), 133-150. Abstract.
(1997). Measuring and defining bimodal sediments: Problems and implications. Water Resources Research, 33(5), 1179-1185. Abstract.
(1997). Modelling flood hydraulics and overbank deposition on river floodplains. Earth Surface Processes and Landforms, 22(1), 59-77. Abstract.
Nicholas AP, Walling DE (1996). The significance of particle aggregation in the overbank deposition of suspended sediment on river floodplains. Journal of Hydrology, 186(1-4), 275-293. Abstract.
Nicholas AP, Ashworth PJ, Kirkby MK, Macklin MG, Murray T (1995). Sediment slugs: large-scale fluctuations in fluvial sediment transport rates and storage volumes. Progress in Physical Geography, 19, 500-519.

Chapters

Prokocki EW, Best JL, Ashworth PJ, Parsons DR, Smith GHS, Nicholas AP, Simpson CJ, Wang H, Sandbach SD, Keevil CE, et al (2015). Mid to late Holocene geomorphological and sedimentological evolution of the fluvial-tidal zone. Lower Columbia River, WA/OR, USA. In  (Ed) Developments in Sedimentology, 193-226.  Abstract.
Nicholas AP, Thomas R, Quine TA (2006). Cellular modelling of braided river form and process. In Smith S, GH, Best, J, Bristow, Petts C, GE (Eds.) Braided Rivers, Blackwell, 136-150.
Nicholas, A.P. (2005). Roughness parameterization in CFD modeling of gravel-bed rivers. In Bates PD, Lane SN, Ferguson RI (Eds.) Computational Fluid Dynamics: Applications in Environmental Hydraulics, Wiley, 329-355.
Walling DE, He Q, Nicholas AP (1996). River floodplains as suspended sediment sinks. In Anderson MG, Walling DE, Bates PD (Eds.) Floodplain Processes, Wiley, 399-440.

Conferences

(2016). Using bedform migration and orientation to infer sediment transport pathways in a sandy braided river.  Abstract.
Parsons DR, Amsler ML, Szupiany RN, Ashworth PJ, Best JL, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, Sambrook Smith GH, et al (2010). Process-product relationships in a large multi-channel river: the Río Paraná, Argentina. 6th IAHR Symposium on River, Coastal and Estuarine Morphodynamics: RCEM 2009.
Sandbach SD, Hardy RJ, Lane SN, Parsons DR, Best JL, Ashworth PJ, Reesink AJH, Amsler ML, Szupiany RN, Nicholas AP, et al (2010). Three-dimensional modelling of a very large river; the Rio Parana. IAHR International Conference on Fluvial Hydraulics, River Flow 2010.
Hutton CJ, Nicholas AP, Nearing MA, Brazier RB (2009). Ephemeral channel modelling at historic timescales in semi-arid environments. Advances in Studies on Desertification.
Clarke L, Quine TA, Nicholas AP (2008). An evaluation of the role of physical models in exploring form-process feedbacks in alluvial fans. Sediment Dynamics in Changing Environments.
(2006). River flood plains as carbon sinks.  Abstract.
(2004). Monitoring and modelling flow and suspended sediment transport processes in alluvial cutoffs.  Abstract.
(2004). The grain size characteristics of overbank deposits on the flood plains of British lowland rivers.  Abstract.
(2003). Modelling and monitoring flow and suspended sediment transport in lowland river flood plain environments.  Abstract.
(2003). Morphological controls on medium-term sedimentation rates on British lowland river floodplains.  Abstract.
Thomas R, Nicholas AP, Quine TA (2002). Development and application of a cellular model to simulate braided river process-form interactions and morphological change. River Flow 2002.
Nicholas AP (2002). Modelling flood hydraulics in topographically-complex lowland floodplain environments. River Flow 2002.
Nicholas AP, Mclelland SJ (1999). Hydrodynamics of a floodplain recirculation zone investigated by field monitoring and numerical simulation.  Abstract.
Nicholas AP, Woodward JC, Christopoulos G, Macklin MG (1999). Modelling and monitoring river response to environmental change: the impact of dam construction and alluvial gravel extraction on bank erosion rates in the Lower Alfios Basin, Greece.  Author URL.
NICHOLAS AP, WALLING DE (1995). Modelling contemporary overbank sedimentation on floodplains: Some preliminary results.  Author URL.
(1993). A multi-parameter approach to fingerprinting suspended-sediment sources.  Abstract.

Publications by year


In Press

Leyland J, Hackney C, Darby S, Parsons D, Best J, Nicholas AP, Aalto R, Lague D (In Press). Extreme flood-driven bank erosion and sediment transport on a mega-river: Direct process measurements using integrated Mobile Laser Scanning (MLS) and hydro-acoustic techniques. Earth Surface Processes and Landforms Full text.
Darby SE, Hackney CR, Leyland J, Kummu M, Lauri H, Parsons DR, Best JL, Nicholas AP, Aalto R (In Press). Fluvial sediment supply to a mega-delta reduced by shifting tropical-cyclone activity. Nature, 539(7628), 276-279. Abstract.  Author URL.  Full text.
Sandbach S, Nicholas AP, Ashworth P, Best J, Keevil C, Parsons D, Prokocki E, Simpson C (In Press). Hydrodynamic modeling of tidal-fluvial flows in a large river estuary. Estuarine, Coastal and Shelf Science Full text.
Schwendel A, Nicholas AP, Aalto R, Sambrook Smith G, Buckley S (In Press). Interaction between meander dynamics and floodplain heterogeneity in a large tropical sand-bed river: the Rio Beni, Bolivian Amazon. Earth Surface Processes and Landforms Full text.
Schwendel A, Nicholas AP, Aalto R, Sambrook Smith GH, Buckley S (In Press). Interaction between meander dynamics and floodplain heterogeneity in a large tropical sand-bed river: the Rio Beni, Bolivian Amazon. Earth Surface Processes and Landforms
Nicholas AP (In Press). Morphodynamic diversity of the world's largest rivers. Geology
Nicholas AP, Ashworth PJ, Sambrook Smith GH, Sandbach SD (In Press). Numerical simulation of bar and island morphodynamics in anabranching mega-rivers. Journal of Geophysical Research Full text.
Hutton CJ, Nicholas AN, Brazier RE, Nearing MA (In Press). On the effects of improved cross-section representation in 1D flow routing models applied to ephemeral rivers. Water Resources Research

2018

Nicholas A, Aalto R, Sambrook Smith G, Schwendel A (2018). Hydrodynamic controls on alluvial ridge construction and avulsion likelihood in meandering river floodplains. Geology, 46(7), 639-642. Full text.
Strick R, Ashworth P, Sambrook Smith G, Nicholas AP, Best J, Lane S, Parsons D, Simpson C, Unsworth C, Dale J, et al (2018). Quantification of bedform dynamics and bedload sediment flux in sandy braided rivers from airborne and satellite imagery. Earth Surface Processes and Landforms Full text.
(2018). Soil microbial populations in deep floodplain soils are adapted to infrequent but regular carbon substrate addition. Soil Biology and Biochemistry, 122, 60-70. Abstract.  Full text.
(2018). The planform mobility of river channel confluences: Insights from analysis of remotely sensed imagery. Earth-Science Reviews, 176, 1-18. Abstract.  Full text.
Sambrook Smith GH, Nicholas AP, Best JL, Bull JM, Dixon SJ, Goodbred S, Sarker MH, Vardy ME (2018). The sedimentology of river confluences. Sedimentology Full text.

2017

(2017). Analysis of fundamental physical factors influencing channel bank erosion: results for contrasting catchments in England and Wales. Environmental Earth Sciences, 76(7). Abstract.
Hackney CR, Darby SE, Parsons DR, Leyland J, Aalto R, Nicholas AP, Best JL (2017). The influence of flow discharge variations on the morphodynamics of a diffluence-confluence unit on a large river. Earth Surface Processes and Landforms, 43(2), 349-362. Full text.

2016

Nicholas AP, Sambrook Smith GH, Amsler ML, Ashworth PJ, Best JL, Hardy RJ, Lane SN, Orfeo O, Parsonsm DR, Reesink AJH, et al (2016). The role of discharge variability in determining alluvial stratigraphy. Geology, 44(1), 3-6. Abstract.  Full text.
(2016). Using bedform migration and orientation to infer sediment transport pathways in a sandy braided river.  Abstract.

2015

Prokocki EW, Best JL, Ashworth PJ, Parsons DR, Smith GHS, Nicholas AP, Simpson CJ, Wang H, Sandbach SD, Keevil CE, et al (2015). Mid to late Holocene geomorphological and sedimentological evolution of the fluvial-tidal zone. Lower Columbia River, WA/OR, USA. In  (Ed) Developments in Sedimentology, 193-226.  Abstract.
Hackney C, Best J, Leyland J, Darby SE, Parsons D, Aalto R, Nicholas A (2015). Modulation of outer bank erosion by slump blocks: Disentangling the protective and destructive role of failed material on the three-dimensional flow structure. Geophysical Research Letters Abstract.  Full text.

2014

Grenfell MC, Nicholas AP, Aalto R (2014). Mediative adjustment of river dynamics: the role of chute channels in tropical sand-bed meandering rivers. Sedimentary Geology, 301, 93-106. Abstract.
Best JL, Parsons DR, Amsler ML, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, Sandbach SD, Simpson CJ, Szupiany RN, et al (2014). Scales and causes of heterogeneity in bars in a large multi-channel river: Río Paraná, Argentina. Sedimentology, 61(4), 1055-1085. Abstract.
Reesink AJH, Ashworth PJ, Sambrook Smith GH, Best JL, Parsons DR, Amsler ML, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, et al (2014). Scales and causes of heterogeneity in bars in a large multi-channel river: Río paraná, argentina. Sedimentology

2013

(2013). Modelling the continuum of river channel patterns. Earth Surface Processes and Landforms, 38(10), 1187-1196. Abstract.

2012

(2012). Application of a roughness-length representation to parameterize energy loss in 3-D numerical simulations of large rivers. Water Resources Research, 48(12). Abstract.
Orfeo O, Parsons DR, Reesink AJH, Sambrook Smith GH, Szupiany RN (2012). Modelling hydrodynamics in the Rio Paraná, Argentina: an evaluation and inter-comparison of reduced-complexity and physics based models applied to a large sand-bed river. Geomorphology, 169-170, 192-211. Abstract.
Nicholas AP, Sandbach SD, Ashworth PJ, Amsler ML, Best JL, Hardy RJ, Lane SN, Orfeo O, Parsons DR, Reesink AJH, et al (2012). Modelling hydrodynamics in the Rio Paraná, Argentina: an evaluation and inter-comparison of reduced-complexity and physics based models applied to a large sand-bed river. Geomorphology

2011

Grenfell MC, Aalto RE, Nicholas AP (2011). Chute channel dynamics in large, sand-bed meandering rivers. Earth Surface Processes and Landforms Abstract.

2010

Clarke L, Quine TA, Nicholas AP (2010). An Experimental investigation of autogenic behaviour during alluvial fan evolution. Geomorphology, 115, 278-285.
Parsons DR, Amsler ML, Szupiany RN, Ashworth PJ, Best JL, Hardy RJ, Lane SN, Nicholas AP, Orfeo O, Sambrook Smith GH, et al (2010). Process-product relationships in a large multi-channel river: the Río Paraná, Argentina. 6th IAHR Symposium on River, Coastal and Estuarine Morphodynamics: RCEM 2009.
Nicholas AP, Quine TA (2010). Quantitative assessment of landform equifinality and palaeoenvironmental reconstruction using geomorphic models. Geomorphology, 121(3-4), 167-183.
Nicholas AP (2010). Reduced-complexity modelling of free bar morphodynamics in alluvial channels. Journal of Geophysical Research - Earth Surface, doi:10.1029/2010JF001774.
Sandbach SD, Hardy RJ, Lane SN, Parsons DR, Best JL, Ashworth PJ, Reesink AJH, Amsler ML, Szupiany RN, Nicholas AP, et al (2010). Three-dimensional modelling of a very large river; the Rio Parana. IAHR International Conference on Fluvial Hydraulics, River Flow 2010.

2009

Nicholas AP, Clarke L, Quine TA (2009). A numerical modelling and experimental study of flow width dynamics on alluvial fans. Earth Surface Processes and Landforms, 34, 1985-1993.
Clarke L, Quine TA, Nicholas AP (2009). An experimental investigation of autogenic behaviour during alluvial fan evolution. Geomorphology, 115, 278-285.
Hutton CJ, Nicholas AP, Nearing MA, Brazier RB (2009). Ephemeral channel modelling at historic timescales in semi-arid environments. Advances in Studies on Desertification.
Nicholas AP (2009). Reduced-complexity flow routing models for sinuous single-thread channels: intercomparison with a physically-based shallow-water equation model. Earth Surface Processes and Landforms, 34, 641-653.

2008

Clarke L, Quine TA, Nicholas AP (2008). An evaluation of the role of physical models in exploring form-process feedbacks in alluvial fans. Sediment Dynamics in Changing Environments.

2007

(2007). Cellular modelling as a tool for interpreting historic braided river evolution. Geomorphology, 90(3-4), 302-317. Abstract.
Nicholas AP, Quine TA (2007). Crossing the divide: Representation of channels and processes in reduced-complexity river models at reach and landscape scales. Geomorphology, 90(3-4), 318-339.
Nicholas AP, Quine TA (2007). Modelling alluvial landform change in the absence of external environmental forcing. Geology, 35(6), 527-530.

2006

Nicholas AP, Thomas R, Quine TA (2006). Cellular modelling of braided river form and process. In Smith S, GH, Best, J, Bristow, Petts C, GE (Eds.) Braided Rivers, Blackwell, 136-150.
Nicholas AP, Fang X, Sweet RJ, Walling DE (2006). Development and evaluation of a new catchment-scale model of floodplain sedimentation . Water Resources Research, 42(10).
Walling, D.E. Sweet, R.J. Fang, X. (2006). New strategies for upscaling high-resolution flow and overbank sedimentation models to quantify floodplain sediment storage at the catchment scale. Journal of Hydrology, 329(3-4), 577-594.
(2006). River flood plains as carbon sinks.  Abstract.

2005

(2005). Cellular modelling in fluvial geomorphology. Earth Surface Processes and Landforms, 30(5), 645-649. Abstract.
Sambrook-Smith, G.H. (2005). Effect on flow structure of sand deposition on a gravel bed: results from a two-dimensional flume experiment. Water Resources Research, 41(10), 1-12.
Nicholas, A.P. (2005). Roughness parameterization in CFD modeling of gravel-bed rivers. In Bates PD, Lane SN, Ferguson RI (Eds.) Computational Fluid Dynamics: Applications in Environmental Hydraulics, Wiley, 329-355.

2004

Nicholas AP, McLelland SJ (2004). Computational fluid dynamics modelling of three-dimensional processes on natural river floodplains. Journal of Hydraulic Research, 42(2), 131-143.
(2004). Monitoring and modelling flow and suspended sediment transport processes in alluvial cutoffs.  Abstract.
(2004). The grain size characteristics of overbank deposits on the flood plains of British lowland rivers.  Abstract.

2003

(2003). Investigation of spatially distributed braided river flows using a two-dimensional hydraulic model. Earth Surface Processes and Landforms, 28(6), 655-674. Abstract.
(2003). Modelling and monitoring flow and suspended sediment transport in lowland river flood plain environments.  Abstract.
(2003). Morphological controls on medium-term sedimentation rates on British lowland river floodplains.  Abstract.
(2003). Numerical simulation of overbank processes in topographically complex floodplain environments. Hydrological Processes, 17(4), 727-746. Abstract.
(2003). Tillage erosion intensity in the South Canterbury Downlands, New Zealand. Australian Journal of Soil Research, 41(4), 789-807. Abstract.

2002

Thomas R, Nicholas AP, Quine TA (2002). Development and application of a cellular model to simulate braided river process-form interactions and morphological change. River Flow 2002.
Nicholas AP (2002). Modelling flood hydraulics in topographically-complex lowland floodplain environments. River Flow 2002.
Thomas, R. (2002). Simulation of braided river flow using a new cellular routing scheme. Geomorphology, 43(3-4), 179-195.

2001

(2001). Computational fluid dynamics modelling of boundary roughness in gravel-bed rivers: an investigation of the effects of random variability in bed elevation. Earth Surface Processes and Landforms, 26(4), 345-362. Abstract.

2000

(2000). A new method for evaluating errors in high-frequency ADV measurements. Hydrological Processes, 14(2), 351-366. Abstract.
(2000). Modelling bedload yield braided gravel bed rivers. Geomorphology, 36(1-2), 89-106. Abstract.

1999

Nicholas AP, Mclelland SJ (1999). Hydrodynamics of a floodplain recirculation zone investigated by field monitoring and numerical simulation.  Abstract.
Nicholas AP, Woodward JC, Christopoulos G, Macklin MG (1999). Modelling and monitoring river response to environmental change: the impact of dam construction and alluvial gravel extraction on bank erosion rates in the Lower Alfios Basin, Greece.  Author URL.
(1999). Numerical simulation of three-dimensional flow hydraulics in a braided channel. Hydrological Processes, 13(6), 913-929. Abstract.

1998

(1998). Numerical modelling of floodplain hydraulics and suspended sediment transport and deposition. Hydrological Processes, 12(8), 1339-1355. Abstract.
Nicholas AP, Smith GHS (1998). Relationships between flow hydraulics, sediment supply, bedload transport and channel stability in the proglacial Virkisa River, Iceland. GEOGRAFISKA ANNALER SERIES A-PHYSICAL GEOGRAPHY, 80A(2), 111-122. Author URL.
(1998). Relationships between flow hydraulics, sediment supply, bedload transport and channel stability in the proglacial Virkisa River, Iceland. Geografiska Annaler, Series A: Physical Geography, 80(2), 111-122. Abstract.

1997

(1997). Investigating spatial patterns of medium-term overbank sedimentation on floodplains: a combined numerical modelling and radiocaesium-based approach. Geomorphology, 19(1-2), 133-150. Abstract.
(1997). Measuring and defining bimodal sediments: Problems and implications. Water Resources Research, 33(5), 1179-1185. Abstract.
(1997). Modelling flood hydraulics and overbank deposition on river floodplains. Earth Surface Processes and Landforms, 22(1), 59-77. Abstract.

1996

Walling DE, He Q, Nicholas AP (1996). River floodplains as suspended sediment sinks. In Anderson MG, Walling DE, Bates PD (Eds.) Floodplain Processes, Wiley, 399-440.
Nicholas AP, Walling DE (1996). The significance of particle aggregation in the overbank deposition of suspended sediment on river floodplains. Journal of Hydrology, 186(1-4), 275-293. Abstract.

1995

NICHOLAS AP, WALLING DE (1995). Modelling contemporary overbank sedimentation on floodplains: Some preliminary results.  Author URL.
Nicholas AP, Ashworth PJ, Kirkby MK, Macklin MG, Murray T (1995). Sediment slugs: large-scale fluctuations in fluvial sediment transport rates and storage volumes. Progress in Physical Geography, 19, 500-519.

1993

(1993). A multi-parameter approach to fingerprinting suspended-sediment sources.  Abstract.

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Member of the NERC peer review college

Teaching

Office hours:

Week 1 : Tue 26th Sept (9:30-10:30) & Thur 28th Sept (9:30-10:30)

Other weeks in Term 1: Mon (9:30-10:30) & Wed (11:00-12:00)

 

 

Modules

2018/19


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