Preprints
https://doi.org/10.5194/hess-2022-275
https://doi.org/10.5194/hess-2022-275
 
10 Aug 2022
10 Aug 2022
Status: this preprint is currently under review for the journal HESS.

Resistance parameters and permissible velocity from cohesive channels

Jose Ramon Barros Cantalice1, Layane Carmen A. Rocha1, Carlos Victor O. Alves1, Amanda Quintela Moura1, Edgo Jackson Pinto Santiago2, Maykon Rodrigo Barros1, and Paulo Costa Medeiros3 Jose Ramon Barros Cantalice et al.
  • 1Soil Conservation Engineering Laboratory, Environmental Engineering Program, Rural Federal University of Pernambuco (UFRPE), Recife-PE, Brazil
  • 2Biometry and Applied Statistics Program, Rural Federal University of Pernambuco (UFRPE), Recife-PE, Brazil
  • 3Federal University of Campina Grande, Sume Campus, Sume-PB, Brazil

Abstract. The forces determining erosion resistance in cohesive channels are not yet completely understood. Therefore, this study aimed to evaluate the resistance parameters and obtain a flow velocity equation for such channels. Experimental data were obtained from cohesive channels with a 60 % clay proportion and under increasing flow levels. The soil detachment rates were inversely proportional to the applied shear stress, and the obtained critical shear stress and soil erodibility values were as high as 120 Pa and 0.00003 kg N-1 s-1, respectively. Under the highest applied flow, the yield stress was significantly influenced by the geometry variation, flow velocity, and sediment concentration. The shear stress generated by the applied flows remained below the critical shear stress of the cohesive bed channels. Using the Buckingham theorem, we developed an equation to predict the permissible flow velocity in cohesive channels. this will help engineers design and manage river structures more effectively.

Jose Ramon Barros Cantalice et al.

Status: open (until 04 Nov 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on hess-2022-275', Rahul Kumar, 09 Sep 2022 reply
    • AC1: 'Reply on CC1', JOSE CANTALICE, 29 Sep 2022 reply
    • CC4: 'Reply on CC1', Layane Carmen A. Rocha, 29 Sep 2022 reply
  • CC2: 'Comment on hess-2022-275', Valdemir Silva Junior, 29 Sep 2022 reply
    • CC3: 'Reply on CC2', Layane Carmen A. Rocha, 29 Sep 2022 reply
      • AC2: 'Reply on CC3', JOSE CANTALICE, 29 Sep 2022 reply

Jose Ramon Barros Cantalice et al.

Jose Ramon Barros Cantalice et al.

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Short summary
Cohesive channels are naturally less erodible due to the clay in their streambed, which confers more resistance to the shear stress generated by concentrated flow. How much faster can the flow be concentrated in the cohesive channels? What resistance can parameters be used in cohesive channels? How the permissible velocity equations were initially developed for alluvial channels, there is still little information on permissible velocity on cohesive channels. So read this paper to know.