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.

 Overview

The third issue of the Journal of Hydraulic Research includes one Forum Paper, five Research Papers, two Technical Notes, and three substantive Discussions. These original contributions cover a wide range of subjects in hydraulic engineering and their authors represent many universities, institutes, laboratories, research centers and utilities located in twelve countries and five continents! More specifically, the Forum Paper is of historical nature. It portrays Prof. Arved J. Raudkivi, a very influential researcher in fluvial and coastal zone hydraulics, who wrote the first and widely used book on this subject, Loose Boundary Hydraulics. The themes considered in the Research Papers are: use of large eddy simulations (LES) to study the interaction of a submerged rectangular step with periodic waves in shallow water depths (computational); dynamic response of the flow in a channel and its floodplains following an instantaneous dike-break (experimental); effect of embankment sediment grain size distribution on the evolution of a spatial dam breach (experimental/numerical); Archimedes screw generators (analytical); energy losses due to clogging of inclined bar racks at the water intake of hydropower plants (experimental/analytical). Furthermore, the corresponding themes in the Technical Notes are: calculation of the head loss in an open channel with ice cover under steady flow (analytical); estimation of specific interfacial areas in aerated flows (theoretical). Undoubtedly, these contributions advance the current state-of-knowledge on subjects of importance to researchers and practitioners alike.

IAHR members can access the latest issue online.
Non IAHR members must access through Taylor & Francis website.

 Forum Paper

Arved J. Raudkivi and loose-boundary hydraulics
Robert Ettema and Bruce W. Melville 
Pages: 283-296 I DOI: 10.1080/00221686.2025.2483838

 Research Papers

Large eddy simulation of three-dimensional vortex structures in cnoidal waves over a submerged step | 
Aristos Christou, Thorsten Stoesser, Zhihua Xie
Pages: 297-319 I DOI: 10.1080/00221686.2025.2476432

Experimental study on the hydrodynamic response inside the main channel and the floodplain during an instantaneous dike break
Zhongxiang Wang ,Dawei Zhang, Liyun Xiang, Zhongbo Yu, Huiwen Liu, Chang Chen
Pages: 320-336 I DOI: 10.1080/00221686.2025.2496993

Effect of grain size distribution in non-cohesive spatial dam breach: hydraulic model investigation and systematic calibration of 2D numerical model | 
Matthew C. Halso, Frederic M. Evers, David F. Vetsch and Robert M. Boes
Pages: 337-356 I DOI: 10.1080/00221686.2025.2490172

Analytical model for Archimedes screw generators with rotating trough
Xavier Brunissen, Guilhem Dellinger, Nicolas Dellinger, Leandro Duarte, Scott Simmons, Abdelali Terfous and Abdellah Ghenaim
Pages: 357-373 I DOI: 10.1080/00221686.2025.2491779

Prediction of head losses for clogged inclined narrow bar rack system
Guillaume Bon, Ludovic Chatellier, Yves Le Guer, Cécile Bellot, Xavier Casiot and Laurent David
Pages: 374-391 I DOI: 10.1080/00221686.2025.2503771

 Technical Notes

A minimum principle for head losses in open channels with ice cover
Damien Violeau
Pages: 392-395 I DOI: 10.1080/00221686.2025.2486276

On the estimation of specific interfacial areas in aerated flows | 
M. Kramer
Pages: 396-400 | DOI: 10.1080/00221686.2025.2492298

 Discussion

Discussion of ‘Air water flows’ By Daniel Valero, Stefan Felder, Matthias Kramer, Hang Wang, José M. Carrillo, Michael Pfister and Daniel B. Bung  | 
Hubert Chanson and Davide Wüthrich
Pages: 401-404 I DOI: 10.1080/00221686.2025.2488878

Discussion of ‘Air–water flows’ By Daniel Valero, Stefan Felder, Matthias Kramer, Hang Wang, José M. Carrillo, Michael Pfister and Daniel B. Bung  | 
Davide Wüthrich and Hubert Chanson
Pages: 405-409 I DOI: 10.1080/00221686.2025.2490164

Discussion of ‘Air–water flows’ By Daniel Valero, Stefan Felder, Matthias Kramer, Hang Wang, José M. Carrillo, Michael Pfister and Daniel B. Bung 
Fabián A. Bombardelli, Germán E. Spadari, Brenda Vath and Leiza D’Angelo
Pages:  410-414 I DOI: 10.1080/00221686.2025.2490195

 Closure

Closure to 'Air water flows'
Daniel Valero, Stefan Felder, Matthias Kramer, Hang Wang, José M. Carrillo, Michael Pfister and Daniel B. Bung
Page 415 I DOI: 10.1080/00221686.2025.2490965