The Journal of Hydraulic Research (JHR) publishes research papers in theoretical, experimental and computational hydraulics and fluid mechanics, relating to rivers, lakes, estuaries, coasts, constructed waterways, and some internal flows such as pipe flows. To reflect current trends in water research, articles that explore outcomes of interdisciplinary hydro-environment studies with a strong fluid mechanical component are especially welcome. Although preference is given to fundamental issues, papers focusing on important unconventional or emerging applications of broad interest are also appreciated.

IAHR members can access the latest issue online. 

Overview

The October 2020 issue contains novel and fundamental contributions to open channel flows including hydraulic jumps, canopy flows, fish guidance, gravity currents, onset of vortices in turbines, water wheels, and sediment transport. The contributions to open channel flows include a unique investigation into the coupling of the interaction of one- and two-dimensional models, investigation of the validity range of the hydrostatic assumption in dam-break, development of a novel finite-volume Saint-Venant solver scheme for supercritical and subcritical flows, experimental study of the complex air–water flow properties in hydraulic jumps on slopes, and investigation of the effect of floating objects in flood modelling and risk assessment. In addition, an efficient numerical representation of the impacts of flexible plant reconfiguration on canopy posture and hydrodynamic drag is established, where highly accurate representations of mean horizontal flow velocity and Reynolds stress profiles over the canopy as well as turbulence intensities are presented. The hydraulic performance of fish guidance structures with curved bars has been studied in a suite of two papers with one focussing on the hydraulic performance of the novel curved-bar racks and the establishment of head loss relation, while the other focusses on the flow field details. Also included is a paper on experimental investigation of two-layer stratified gravity currents in the slumping phase for a range of the Froude number, density difference ratio, and the buoyancy distribution parameter. The issue concludes with three technical notes: one on optimization of undershot water wheels in very low and variable flow rate applications, one on Acoustic Doppler Velocimetry (ADV) measurements of flow over a backward-facing step and, lastly, one on numerical modelling of the hydrodynamics and sediment transport near the water intake of the Cardinal power plant.

Research papers

• On the governing equations for horizontal and vertical coupling of one- and two-dimensional open channel flow models 

  Cesar A. Simon, Eddy J. Langendoen, Jorge D. Abad and Alejandro Mendoza

  Pages: 709-724 | DOI: 10.1080/00221686.2019.1671507

• Comparison between hydrostatic and total pressure simulations of dam-break flows 

  Leonardo R. Monteiro, Luísa V. Lucchese and Edith B. C. Schettini

  Pages: 725-737 | DOI: 10.1080/00221686.2019.1671509

• Timescale interpolation and no-neighbour discretization for a 1D finite-volume Saint-Venant solver

  Ben R. Hodges and Frank Liu

  Pages: 738-754 | DOI: 10.1080/00221686.2019.1671510

• Efficient numerical representation of the impacts of flexible plant reconfiguration on canopy posture and hydrodynamic drag 

  Amir Mehdi Razmi , Marcelo Chamecki and Heidi Margaret Nepf

  Pages: 755-766 | DOI: 10.1080/00221686.2019.1671511

• An experimental study of air–water flows in hydraulic jumps on flat slopes

  Laura Montano and Stefan Felder

  Pages: 767-777 | DOI: 10.1080/00221686.2019.1671512

• A new 1D coupled hydrodynamic discrete element model for floating debris in violent shallow flows 

  Yan Xiong, Samantha Mahaffey, Qiuhua Liang, Mohamed Rouainia and Gang Wang

  Pages: 778-789 | DOI: 10.1080/00221686.2019.1671513

• Time-dependent inception of vortex rings in a Francis turbine during load variation: large eddy simulation and experimental validation

  Chirag Trivedi

  Pages: 790-806 | DOI: 10.1080/00221686.2019.1671514

• Hydraulic performance of fish guidance structures with curved bars – Part 1: head loss assessment 

  Claudia Beck, Ismail Albayrak, Julian Meister and Robert M. Boes

  Pages: 807-818 | DOI: 10.1080/00221686.2019.1671515

• Hydraulic performance of fish guidance structures with curved bars – Part 2: flow fields

  Claudia Beck, Ismail Albayrak, Julian Meister and Robert M. Boes

  Pages 819-830 | DOI: 10.1080/00221686.2019.1671516
  

• Experiments on two-layer stratified gravity currents in the slumping phase

  Ching-Sen Wu and Albert Dai

  Pages: 831-844 | DOI: 10.1080/00221686.2019.1671517

Technical notes

• Optimization of undershot water wheels in very low and variable flow rate applications 

  Emanuele Quaranta and Gerald Müller

  Pages: 845-849 | DOI: 10.1080/00221686.2019.1671508

• Acoustic Doppler velocimetry measurements of flow over a backward-facing step 

  Maria Amélia V.C. Araújo, Billy J. Araújo and Brian Greenwood

  Pages: 850-858 | DOI: 10.1080/00221686.2019.1671521

• Numerical modelling of the hydrodynamics and sediment transport near the water intake of the Cardinal power plant

  Marcela Politano, J. Ezequiel Martin, Troy Lyons and Kathy Dober

  Pages: 859-866 | DOI: 10