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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 19, issue 6
Hydrol. Earth Syst. Sci., 19, 2963–2969, 2015
https://doi.org/10.5194/hess-19-2963-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 19, 2963–2969, 2015
https://doi.org/10.5194/hess-19-2963-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Technical note 26 Jun 2015

Technical note | 26 Jun 2015

Technical Note: Semi-automated effective width extraction from time-lapse RGB imagery of a remote, braided Greenlandic river

C. J. Gleason et al.
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Ashmore, P. and Sauks, E.: Prediction of discharge from water surface width in a braided river with implications for at-a-station hydraulic geometry, Water Resour. Res., 42, W03406, https://doi.org/10.1029/2005wr003993, 2006.
Ashmore, P., Bertoldi, W., and Gardner, J. T.: Active width of gravel-bed braided rivers, Earth Surf. Proc. Land., 36, 1510–1521, https://doi.org/10.1002/esp.2182, 2011.
Bertoldi, W., Zanoni, L., and Tubino, M.: Planform dynamics of braided streams, Earth Surf. Proc. Land., 34, 547–557, https://doi.org/10.1002/esp.1755, 2009.
Bertoldi, W., Zanoni, L., and Tubino, M.: Assessment of morphological changes induced by flow and flood pulses in a gravel bed braided river: the Tagliamento River (Italy), Geomorphology, 114, 348–360, https://doi.org/10.1016/j.geomorph.2009.07.017, 2010.
Bird, S., Hogan, D., and Schwab, J.: Photogrammetric monitoring of small streams under a riparian forest canopy, Earth Surf. Proc. Land., 35, 952–970, 2010.
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Here, we give a semi-automated processing workflow to extract hydraulic parameters from over 10,000 time-lapse images of the remote Isortoq River in Greenland. This workflow allows efficient and accurate (mean accuracy 79.6%) classification of images following an automated similarity filtering process. We also give an effective width hydrograph (a proxy for discharge) for the Isortoq using this workflow, showing the potential of this workflow for enhancing understanding of remote rivers.
Here, we give a semi-automated processing workflow to extract hydraulic parameters from over...
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