Education

PhD, 2015: Civil Environmental Engineering, Griffith University, Brisbane, Queensland, Australia.

MSc, 2010: Hydraulic Structures Engineering, University of Tehran, Tehran, Tehran, Iran.

BSc, 2010: Water Engineering, University of Mazandaran, Sari, Iran.

Experience

2026-present: Senior Research Associate, EUniversity of Calgary, Calgary, Alberta, CANADA.

2016-2025: Scientist, Earth Sciences New Zealand (Previously NIWA), Christchurch, Canterbury, New Zealand.

Short Bio

Arman Haddadchi is a Senior Research Associate in the Department of Civil Engineering at the University of Calgary, where he conducts research in computational hydrology, sediment and contaminant transport, and watershed processes. Prior to joining the University of Calgary, he spent a decade as a Sediment Transport Scientist at Earth Sciences New Zealand (ESNZ, formerly NIWA). His research integrates field monitoring, remote sensing, machine learning, and process-based modelling to understand and predict environmental change across catchment-to-coast systems, with applications in hydrology, geomorphology, water quality, and climate adaptation.

Publications

Haddadchi, A., & Hicks, M. (2026). Event-Based Suspended Sediment Budgets Across a Gravel Bed River Network. Journal of Geophysical Research: Earth Surface. 131, e2025JF008721. https://doi.org/10.1029/2025JF008721

Borges, Maria E., Cochrane, T. A., Pahlow, M., Haddadchi, A., (2026) Improving flow simulations for lake catchments with uncertain data using SWAT+. Hydrology Research.

Haddadchi, A., & Rose, C. (2025). An advection-dispersion model for routing suspended sediment down the river network. Environmental Modelling & Software: 106417. https://doi.org/10.1016/j.envsoft.2025.106417

Biggs, H., Haddadchi, A., Bind, J., Brasington. J. (2025). The impact of riparian vegetation on bank stabilisation and bank erosion during extreme weather events. Earth Surface Processes and Landforms. https://doi.org/10.1002/esp.70136

Davies-Colley, R.J., Hughes, A.O., Haddadchi, A., Dymond, J.R., Vale, S.S., Smith, H.G. (2025) Suspended sediment properties and visual clarity of the Manawatū River, New Zealand. New Zealand Journal of Marine and Freshwater Research: 1-22. https://doi.org/10.1080/00288330.2024.2339888

Hale, R., Zeldis, J., Dudley, B.D., Haddadchi, A., Plew, D., Shankar, U., Swales, A., Roberts, K., O’Connell-Milne, S., Verburg, P. (2024) Hindcasting estuary ecological states using sediment cores, modelled historic nutrient loads, and a Bayesian network. Frontiers in Marine Science, 11. https://doi.org/10.3389/fmars.2024.1374869

Haddadchi, A., Bind, J., Hoyle, J., Hicks, M. (2023) Quantifying the contribution of bank erosion to a suspended sediment budget using boat-mounted LiDAR and high frequency suspended sediment monitoring. Earth Surface Processes and Landforms, 48(14), 2920–2938. https://doi.org/10.1002/esp.5667

Rose, C. & Haddadchi, A. (2023) Soil Erosion Processes involving water. Soil Research. Soil Research, 61, 735-754. https://doi.org/10.1071/SR23080

Vale, S.S., Smith, H.G., Davies-Colley, R.J., Dymond, J.D., Hughes, A., Haddadchi, A., Phillips, C.J. (2023) Evaluating the impact of erosion sources on sediment-related water quality attributes. Science of Total Environment.

Haddadchi, A., & Rose, C. (2022). A physically-based model of deposition, re-entrainment, and transport of fine sediment in gravel-bed rivers. Water Resources Research 58, e2021WR031782. https://doi.org/10.1029/2021WR031782

Stevens, L. M., Forrest, B. M., Dudley, B. D., Plew, D. R., Zeldis, J. R., Shankar, U., Haddadchi, A., & Roberts, K. L. (2022). Use of a multi-metric macroalgal index to document severe eutrophication in a New Zealand estuary. New Zealand Journal of Marine and Freshwater Research, 1-20. https://doi.org/10.1080/00288330.2022.2093226

Biggs, H., Starr, A., Smith, B., de Lima, S., Sykes, J., Haddadchi, A., Smart, G., & Hicks, M. (2022). Kinematic Loggers - Development of Rugged Sensors and Recovery Systems for Field Measurements of Stone Rolling Dynamics and Impact Accelerations during Floods. Sensors, 22(3), 1013. https://www.mdpi.com/1424-8220/22/3/1013

Pearson, C., Ede, M., Haddadchi, A., & Hudson, N. (2021). Developments in surface water monitoring in the last ten years. Journal of Hydrology (New Zealand), 60(2), 11-17. https://doi.org/10.3316/informit.259570255034302

Nosrati, K., Mohammadi-Raigani, Z., Haddadchi, A., & Collins, A. L. (2021). Elucidating intra-storm variations in suspended sediment sources using a Bayesian fingerprinting approach. Journal of Hydrology, 596, 126115. https://doi.org/10.1016/j.jhydrol.2021.126115

Haddadchi, A., & Hicks, M. (2021). Interpreting event-based suspended sediment concentration and flow hysteresis patterns. Journal of Soils and Sediments, 21, 592-612. https://doi.org/10.1007/s11368-020-02777-y

Biggs, H. J., Haddadchi, A., & Hicks, D. M. (2021). Interactions between aquatic vegetation, hydraulics and fine sediment: A case study in the Halswell River, New Zealand. Hydrological Processes, 35(6), e14245. https://doi.org/10.1002/hyp.14245

McMahon, J. M., Olley, J. M., Brooks, A. P., Smart, J. C. R., Stewart-Koster, B., Venables, W. N., Curwen, G., Kemp, J., Stewart, M., Saxton, N., Haddadchi, A., & Stout, J. C. (2020). Vegetation and longitudinal coarse sediment connectivity affect the ability of ecosystem restoration to reduce riverbank erosion and turbidity

in drinking water. Science of The Total Environment, 707, 135904. https://doi.org/10.1016/j.scitotenv.2019.135904

Haddadchi, A., Kuczynski, A., Hoyle, J. T., Kilroy, C., Booker, D. J., & Hicks, M. (2020). Periphyton removal flows determined by sediment entrainment thresholds. Ecological Modelling, 434, 109263. https://doi.org/10.1016/j.ecolmodel.2020.109263

Haddadchi, A., & Hicks, M. (2020). Understanding the effect of catchment characteristics on suspended sediment dynamics during flood events. Hydrological Processes, 34(7), 1558-1574. https://doi.org/10.1002/hyp.13682

Haddadchi, A., Hicks, M., Olley, J. M., Singh, S., & Srinivasan, M. S. (2019). Grid-based sediment tracing approach to determine sediment sources. Land Degradation & Development, 30(17), 2088-2106. https://doi.org/10.1002/ldr.3407

Rose, C. W., Olley, J. M., Haddadchi, A., Brooks, A. P., & McMahon, J. (2018). An alternative method for interpreting jet erosion test (JET) data: part 1. Theory. Earth Surface Processes and Landforms, 43(3), 735-742. https://doi.org/10.1002/esp.4269

Haddadchi, A., Rose, C. W., Olley, J. M., Brooks, A. P., McMahon, J., & Pietsch, T. (2018). An alternative method for interpreting JET erosion test (JET) data: Part 2. Application. Earth Surface Processes and Landforms, 43(3), 743-754. https://doi.org/10.1002/esp.4270

Nosrati, K., Haddadchi, A., Collins, A. L., Jalali, S., & Zare, M. R. (2018). Tracing sediment sources in a mountainous forest catchment under road construction in northern Iran: comparison of Bayesian and frequentist approaches. Environmental Science and Pollution Research, 25(31), 30979-30997. https://doi.org/10.1007/s11356-018-3097-5

Haddadchi, A., Booker, D. J., & Measures, R. J. (2018). Predicting river bed substrate cover proportions across New Zealand. Catena, 163, 130-146. https://doi.org/10.1016/j.catena.2017.12.014

Haddadchi, A., Olley, J., & Pietsch, T. (2016). Variable source contributions to river bed sediments across three size fractions. Hydrological Processes, 30(10), 1609-1623. https://doi.org/10.1002/hyp.10732

Haddadchi, A., Olley, J., & Pietsch, T. (2016). Using LM-OSL of quartz to distinguish sediments derived from surface-soil and channel erosion. Hydrological Processes, 30(4), 637-647. https://doi.org/10.1002/hyp.10646

Nosrati, K., Haddadchi, A., Zare, M. R., & Shirzadi, L. (2015). An evaluation of the role of hillslope components and land use in soil erosion using 137Cs inventory and soil organic carbon stock. Geoderma, 243-244, 29-40. https://doi.org/10.1016/j.geoderma.2014.12.008

Haddadchi, A., Olley, J., & Pietsch, T. (2015). Quantifying sources of suspended sediment in three size fractions. Journal of Soils and Sediments, 15(10), 2086-2100. https://doi.org/10.1007/s11368-015-1196-1

Haddadchi, A., Olley, J., & Laceby, P. (2014). Accuracy of mixing models in predicting sediment source contributions. Science of The Total Environment, 497-498, 139-152. https://doi.org/10.1016/j.scitotenv.2014.07.105

Haddadchi, A., Nosrati, K., & Ahmadi, F. (2014). Differences between the source contribution of bed material and suspended sediments in a mountainous agricultural catchment of western Iran. Catena, 116, 105-113. https://doi.org/10.1016/j.catena.2013.12.011

Dehghani, A. A., Haddadchi, A., Omid, M. H., & Movahedi, N. (2014). Applicability of MEP and SEMEP for computing total sediment load (Case Study: Chelichay Catchment in Golestan Province). KSCE Journal of Civil Engineering, 18(6), 1912-1919. https://doi.org/10.1007/s12205-014-1454-6

Haddadchi, A., Ryder, D. S., Evrard, O., & Olley, J. (2013). Sediment fingerprinting in fluvial systems: review of tracers, sediment sources and mixing models. International Journal of Sediment Research, 28(4), 560-578. https://doi.org/10.1016/S1001-6279(14)60013-5

Haddadchi, A., Omid, M. H., & Sdehghani, A. A. (2013). Total load transport in gravel bed and sand bed rivers case study: Chelichay watershed. International Journal of Sediment Research, 28(1), 46-57. https://doi.org/10.1016/S1001-6279(13)60017-7

Haddadchi, A., Omid, M. H., & Dehghani, A. A. (2013). Bedload Equation Analysis Using Bed Load-Material Grain Size. Journal of Hydrology and Hydromechanics, 61(3), 241-249. https://doi.org/10.2478/johh-2013-0031

Haddadchi, A., Movahedi, N., Vahidi, E., Omid, M. H., & Dehghani, A. A. (2013). Evaluation of suspended load transport rate using transport formulas and artificial neural network models (Case study: Chelchay Catchment). Journal of Hydrodynamics, Ser. B, 25(3), 459-470. https://doi.org/10.1016/S1001-6058(11)60385-6

Haddadchi, A., Omid, M. H., & Dehghani, A. A. (2012). Evaluation of Bed Load Discharge Formulas in Alpine Gravel Bed Rivers (Case study: Chehel Chai river in Golestan province). Journal of Water and Soil Conservation, 18(3), 149-164.

Haddadchi, A., Omid, M. H., & Dehghani, A. A. (2012). Assessment of bed-load predictors based on sampling in a gravel bed river. Journal of Hydrodynamics, Ser. B, 24(1), 145-151. https://doi.org/10.1016/S1001-6058(11)60229-1

Dr. Arman Haddadchi

Senior Research Associate in Computational Hydrology