Publications¶

Selected publications organized thematically. For a complete list, see my CV or USGS Publications Warehouse.

Image Velocimetry & Non-Contact Methods¶

Engel, F.L., Knight, T.M., Nystrom, E.A., and Grindle, C.B., in review, Image Velocimetry Tools (IVyTools) — A Windows software application for operational streamflow measurement processing: River Research and Applications.

Tenorio, A., Umarova, A., Fernández, R., Engel, F.L., and Liu, X., in review, Auto-STIV — A deep learning framework for fully autonomous two-dimensional streamflow velocity vector field estimation: Water Resources Research.

Ayyad, M., Engel, F.L., Temimi, M., and Henein, M.M.R., in review, AIPIV — Entropy-guided deep feature particle image velocimetry for robust river surface velocity estimation: Water Resources Research.

Morel, D.B., Kirk, C.A., Fulton, J.F., Engel, F.L., Legleiter, C.J., Forbes, B.T., et al., in review, Measuring river discharge using drone-based cameras, entropy-based probability concept, and image velocimetry algorithms: Remote Sensing.

Legleiter, C.J., Kinzel, P.J., Engel, F.L., Harrison, L.R., and Hewitt, G., 2024, A two-dimensional, reach-scale implementation of Space Time Image Velocimetry (STIV) and comparison to Particle Image Velocimetry (PIV). Earth Surface Processes and Landforms, doi:10.1002/esp.5878.

Duan, J.G., Engel, F.L., and Cadogan, A., 2023, Discharge estimation using video recordings from small unoccupied aircraft systems. Journal of Hydraulic Engineering, 149(11), doi:10.1061/JHEND8.HYENG-13591.

Hydrologic Imagery & Machine Learning¶

Ayyad, M., Temimi, M., Abdelkader, M., Henein, M., Engel, F.L., Lotspeich, R.R., and Eggleston, J.R., 2025, RIce-Net — Integrating ground-based USGS HIVIS cameras and machine learning for automated river ice detection. Engineering Applications of Artificial Intelligence, doi:10.1016/j.envsoft.2025.106454.

Entropy-Based Discharge Computation¶

Fulton, J.W., Engel, F.L., Eggleston, J.R., and Chiu, C.-L., 2025, Computing discharge using the entropy-based probability concept: U.S. Geological Survey Techniques and Methods book 3, chap. A26, 66 p., doi:10.3133/tm3A26.

Hydroacoustics & River Hydraulics¶

Engel, F.L., Jackson, P.R., and Murphy, E.A., 2018, Flow hydraulics and mixing characteristics in and downstream of Brandon Road Lock, Joliet, Illinois: U.S. Geological Survey Scientific Investigations Report, doi:10.3133/sir20185094.

Despax, A., Le Coz, J., Hauet, A., Mueller, D.S., Engel, F.L., et al., 2019, Decomposition of uncertainty sources in acoustic Doppler current profiler streamflow measurements using repeated measures experiments. Water Resources Research, 55, 7520–7540, doi:10.1029/2019WR025296.

Parsons, D.R., Jackson, P.R., Czuba, J.A., Engel, F.L., Rhoads, B.L., et al., 2013, Velocity Mapping Toolbox (VMT): A processing and visualization suite for moving-vessel ADCP measurements. Earth Surface Processes & Landforms, doi:10.1002/esp.3367.

Fluvial Geomorphology¶

Engel, F.L. and Rhoads, B.L., 2017, Velocity profiles and the structure of turbulence at the outer bank of a compound meander bend. Geomorphology 295, 191–201, doi:10.1016/j.geomorph.2017.06.018.

Engel, F.L. and Rhoads, B.L., 2016, Three-dimensional flow structure and patterns of bed shear stress in an evolving compound meander bend. Earth Surface Processes & Landforms, doi:10.1002/esp.3895.

Engel, F.L. and Rhoads, B.L., 2012, Interaction among Mean Flow, Turbulence, Bed Morphology, Bank Failures and Channel Planform in an Evolving Compound Meander Loop. Geomorphology, 163–164(15), 70–83, doi:10.1016/j.geomorph.2011.05.026.

Software Releases¶

Engel, F.L., and Knight, T., 2025, Image Velocimetry Tools (IVyTools): U.S. Geological Survey software release, doi:10.5066/P1KMVCNY.

Lee, A.M., Engel, F.L., Andrews, S.J., Nicotra, M.J., and Gyves, M.C., 2025, Camera Data Collection Platform (CameraDCP): U.S. Geological Survey software release, doi:10.5066/P13SMLIZ.

Engel, F.L., 2023, Surface Velocity Tools (SurfVelTools): U.S. Geological Survey software release, doi:10.5066/P9I5JABK.