Home > Research > Researchers > Dr Sami Ullah > Publications

Dr Sami Ullah

Formerly at Lancaster University

  1. 2015
  2. Published

    Diffusive equilibrium in thin films provides evidence of suppression of hyporheic exchange and large-scale nitrate transformation in a groundwater-fed river

    Byrne, P., Zhang, H., Ullah, S., Binley, A., Heathwaite, L., Heppell, C. M., Lansdown, K. & Trimmer, M., 15/03/2015, In: Hydrological Processes. 29, 6, p. 1385-1396 12 p.

    Research output: Contribution to journalJournal articlepeer-review

  3. 2014
  4. Published

    Control of river stage on the reactive chemistry of the hyporheic zone

    Byrne, P., Binley, A., Heathwaite, L., Ullah, S., Heppell, C. M., Lansdown, K., Zhang, H., Trimmer, M. & Keenan, P., 15/08/2014, In: Hydrological Processes. 28, 17, p. 4766-4779 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  5. Published

    Fine-scale in situ measurement of riverbed nitrate production and consumption in an armored permeable riverbed

    Lansdown, K., Heppell, C. M., Dossena, M., Ullah, S., Heathwaite, A. L., Binley, A., Zhang, H. & Trimmer, M., 15/04/2014, In: Environmental Science and Technology. 48, 8, p. 4425-4434 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  6. Published

    Influence of emergent vegetation on nitrate cycling in sediments of a groundwater-fed river

    Ullah, S., Zhang, H., Heathwaite, A. L., Heppell, C., Lansdown, K., Binley, A. & Trimmer, M., 04/2014, In: Biogeochemistry. 118, 1-3, p. 121-134 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  7. Published

    Interpreting spatial patterns in redox and coupled water–nitrogen fluxes in the streambed of a gaining river reach

    Heppell, C. M., Heathwaite, A. L., Binley, A., Byrne, P., Ullah, S., Lansdown, K., Keenan, P., Trimmer, M. & Zhang, H., 03/2014, In: Biogeochemistry. 117, 2-3, p. 491-509 19 p.

    Research output: Contribution to journalJournal articlepeer-review

  8. 2013
  9. Published

    Revealing the spatial variability of water fluxes at the groundwater-surface water interface

    Binley, A., Ullah, S., Heathwaite, L., Heppell, C. M., Byrne, P., Lansdown, K., Trimmer, M. & Zhang, H., 07/2013, In: Water Resources Research. 49, 7, p. 3972-3992 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  10. Published

    Passive pore water sampling provides evidence of suppression of hyporheic exchange and ntrate transformation in a groundwater-fed river

    Byrne, P., Zhang, H., Heathwaite, L., Binley, A., Ullah, S., Kaeser, D., Heppell, C. M., Lansdown, K. & Trimmer, M., 2013. 8 p.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paper

  11. 2012
  12. Published

    In situ measurement of redox sensitive solutes at high spatial resolution in a riverbed using Diffusive Equilibrium in Thin Films (DET)

    Ullah, S., Zhang, H., Heathwaite, L., Binley, A., Lansdown, K., Heppell, C. M. & Trimmer, M., 12/2012, In: Ecological Engineering. 49, p. 18-26 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  13. Published

    Characterization of the key pathways of dissimilatory nitrate reduction and their response to complex organic substrates in hyporheic sediments

    Lansdown, K., Trimmer, M., Heppell, C. M., Sgouridis, F., Ullah, S., Heathwaite, L., Binley, A. & Zhang, H., 03/2012, In: Limnology and Oceanography. 57, 2, p. 387-400 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  14. 2010
  15. Published

    Carbon dioxide, methane, and nitrous oxide exchanges in an age-sequence of temperate pine forests.

    Peichle, M., Arian, A., Ullah, S. & Moore, T., 08/2010, In: Global Change Biology. 16, 8, p. 2198-2212 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  16. Published

    Nitrous oxide consumption potentials of well-drained forest soils in Southern Québec, Canada.

    Frasier, R., Ullah, S. & Moore, T. R., 18/01/2010, In: Geomicrobiology Journal. 27, 1, p. 53-60 8 p.

    Research output: Contribution to journalJournal articlepeer-review

  17. Published

    Application of in-situ passive samplers for the investigation of the impacts of vegetated river beds on mineral N concentration gradients in the hyporheic zone

    Ullah, S., Zhang, H., Heathwaite, A. L., Lansdown, K., Heppell, C. M., Binley, A. M., Trimmer, M. & Keenan, P. O., 2010.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  18. Published

    Direct evidence of lateral hyporheic flows revealed through single well tracer dilution tests

    Binley, A. M., Ullah, S., Lansdown, K., Heathwaite, A. L. & Kaeser, D., 2010.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  19. Published

    Environmental controls on groundwater- surface water mixing and nitrogen biogeochemistry in the hyporheic zone of a gravel bed river

    Lansdown, K., Heppell, C. M., Ullah, S., Heathwaite, A. L., Trimmer, M., Heaton, T. & Binley, A. M., 2010.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paperpeer-review

  20. Published

    Reach Scale Variability in Vertical Hydraulic Gradients in the Hyporheic Zone of a Groundwater-fed River in Cumbria, UK.

    Ullah, S., Binley, A. M., Heathwaite, A. L., Lansdown, K., Heppell, C. M., Trimmer, M., Mullinger, N., Keenan, P. O. & Zhang, H., 2010.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paper

  21. Published

    Spatial Variability of Redox Sensitive Chemical Species in the Hyporheic Zone of a Groundwater-fed River in Cumbria, UK

    Ullah, S., Heathwaite, A. L., Zhang, H., Lansdown, K. & Heppell, C. M., 2010.

    Research output: Contribution to conference - Without ISBN/ISSN Conference paper

  22. 2009
  23. Published

    Greenhouse gas fluxes from boreal forest soils during the snow-free period in Quebec, Canada.

    Ullah, S., Frasier, R., Pelletier, L. & Moore, T. R., 03/2009, In: Canadian Journal of Forest Research. 39, 3, p. 666-680 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  24. Published

    Soil drainage and vegetation control of nitrogen transformation in forest soils, southern Quebec.

    Ullah, S. & Moore, T., 20/02/2009, In: Journal of Geophysical Research: Biogeosciences. 114, p. G01014

    Research output: Contribution to journalJournal articlepeer-review

  25. Published

    Topographic controls of CH4 and N2O fluxes from temperate and boreal forest soils in eastern Canada.

    Ullah, S. & Moore, T. R., 2009, In: Integrated Land Ecosystem-Atmosphere Process Study Newsletter. 7, p. 30-32 3 p.

    Research output: Contribution to journalJournal article

  26. 2008
  27. Published

    Potential next term fluxes of N2O and CH4 from soils of three forest types in Eastern Canada.

    Ullah, S., Frasier, R., King, L., Picotte-Anderson, N. & Moore, T. R., 04/2008, In: Soil Biology and Biochemistry. 40, 4, p. 986-994 9 p.

    Research output: Contribution to journalJournal articlepeer-review

  28. 2006
  29. Published

    Use of cotton gin trash to enhance denitrification next term in restored forested wetlands.

    Ullah, S. & Faulkner, S. P., 15/12/2006, In: Forest Ecology and Management. 237, 1-3, p. 557-563 7 p.

    Research output: Contribution to journalJournal articlepeer-review

  30. Published

    Denitrification and nitrous oxide emissions from riparian forests soils exposed to prolonged nitrogen runoff

    Ullah, S. & Zinati, G., 12/2006, In: Biogeochemistry. 81, 3, p. 253-267 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  31. Published

    Dentrification potential of different landuse types in an agricultural watershed, lower Mississippi valley.

    Ullah, S. & Faulkner, S., 30/11/2006, In: Ecological Engineering. 28, 2, p. 131-140 10 p.

    Research output: Contribution to journalJournal articlepeer-review

  32. Published

    Functional assessment of urban forested wetlands.

    Ullah, S. & Faulkner, S., 03/2006, In: Proceedings of the Pakistan Academy of Sciences. 43, 1, p. 15-28 14 p.

    Research output: Contribution to journalJournal articlepeer-review

  33. 2005
  34. Published

    Denitrification and N2O emission from forested and cultivated alluvial clay soil.

    Ullah, S., Breitenbeck, G. A. & Faulkner, S. P., 04/2005, In: Biogeochemistry. 73, 3, p. 499-513 15 p.

    Research output: Contribution to journalJournal articlepeer-review

  35. 1999
  36. Published

    Koh-i-Sufaid (White Mountains) in Kurram Agency : a paradise of biodiversity.

    Ullah, S., 1999, In: Natura Magazine, WWF-Pakistan Quarterly Magazine. 26, p. 21-22 2 p.

    Research output: Contribution to journalJournal article

Back to top