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Article

How to Quantify the Dynamics of Single (Straight or Sinuous) and Multiple (Anabranching) Channels from Imagery for River Restoration

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UFR Geography, History, Economy and Societies, UMR 8586 PRODIG, University of Paris, Case 7001, 5 Rue Thomas Mann, CEDEX 13, F-75205 Paris, France
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Research and Scientific Support Department, French National Agency for Biodiversity, 5 Square Félix Nadar, F-94300 Vincennes, France
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LHSV—Saint-Venant Hydraulics Laboratory, 6 Quai Watier, F-78400 Chatou, France
*
Author to whom correspondence should be addressed.
Academic Editors: Yosoon Choi, Hyung-Sup Jung, Raffaele Albano, Aurelia Sole and Ake Sivertun
Appl. Sci. 2021, 11(17), 8075; https://doi.org/10.3390/app11178075
Received: 1 July 2021 / Revised: 9 August 2021 / Accepted: 26 August 2021 / Published: 31 August 2021
Since the 2000s, European rivers have undergone restoration works to give them back a little more ‘freedom space’ and consolidate the hydro-sedimentary continuum and biological continuity as required by the Water Framework Directive (WFD). In high-energy rivers, suppression of lateral constraints (embankment removal) leads to geomorphological readjustments in the modification of both the active-channel length and active-channel width. The article provides a new methodological development to overcome the shortcomings of traditional methods (based on diachronic cross-section analysis) unable to simultaneously take into account these geometric adjustments after active-channel restoration. It allows us to follow and precisely quantify the geomorphological changes of the active channel faced to the stakes (i.e., structures or urbanized, recreation or agricultural areas) in the floodplain. The methodology proposes three new indicators (distance from active channel to stakes or floodplain margins as indicator 1; distance from stakes to active channel as indicator 2; diachronic distance as indicator 3) and a metric analysis grid in the 2D Euclidean space. It is applied to the Clamoux River (order 4, Strahler; bankfull, specific stream power: 280 W/m2) in the Aude watershed (Mediterranean France). The paper shows the full potential of this methodological protocol to be able to meet managers’ expectations as closely as possible within the framework of the multi-annual active-channel monitoring. View Full-Text
Keywords: river restoration; fluvial geomorphology; geographic information system; metric analysis grid; geomorphological monitoring; river management river restoration; fluvial geomorphology; geographic information system; metric analysis grid; geomorphological monitoring; river management
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MDPI and ACS Style

Arnaud-Fassetta, G.; Melun, G.; Passy, P.; Brousse, G.; Theureaux, O. How to Quantify the Dynamics of Single (Straight or Sinuous) and Multiple (Anabranching) Channels from Imagery for River Restoration. Appl. Sci. 2021, 11, 8075. https://doi.org/10.3390/app11178075

AMA Style

Arnaud-Fassetta G, Melun G, Passy P, Brousse G, Theureaux O. How to Quantify the Dynamics of Single (Straight or Sinuous) and Multiple (Anabranching) Channels from Imagery for River Restoration. Applied Sciences. 2021; 11(17):8075. https://doi.org/10.3390/app11178075

Chicago/Turabian Style

Arnaud-Fassetta, Gilles, Gabriel Melun, Paul Passy, Guillaume Brousse, and Olivier Theureaux. 2021. "How to Quantify the Dynamics of Single (Straight or Sinuous) and Multiple (Anabranching) Channels from Imagery for River Restoration" Applied Sciences 11, no. 17: 8075. https://doi.org/10.3390/app11178075

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