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.
Non IAHR members must access through Taylor & Francis website.

 Overview

The fourth issue of the Journal of Hydraulic Research includes eleven contributions; a Vision Paper, seven Research Papers, and three Technical Notes. These original studies advance the current state-of-knowledge on a wide range of subjects in hydraulic engineering that are of interest to the readership of the journal, researchers and practitioners alike. More specifically, the author of the Vision Paper articulates the digital transition in water engineering as a long-term evolutionary process rather than as a disruptive technological rupture. 

The themes considered by the authors of the Research Papers are: 

• aeration and turbulence characteristics of hydraulic jumps over vegetated rough beds;

• development of a retrofitting system to mitigate geyser eruptions within a sewer network;

• the critical role of lateral profile transitions in low-level outlet tunnels of large dams;

• development of 1D non-hydrostatic model for rill flow on step-pool morphology with negligible sediment transport;

• an experimental framework for the investigation of landslide-induced waves in reservoirs;

• 3D numerical investigation of dual lateral intakes located within a 90° channel bend;

• and use of distributed optical fibre sensors to complement photogrammetric measurements for monitoring small-scale dike breaching experiments.

Finally, the Technical Notes in this issue examine the following subjects: modelling of air–water interactions in breaking hydraulic jumps; a theoretical framework for the prediction of momentum and energy fluxes in dry-bed dam break waves; and a validated reference for determining the conveyance capacity of stepped dropshafts commonly used in deep urban tunnel drainage systems.

 Vision paper

Shaping Digital Transition in Water Engineering  
Orazio Giustolisi
Pages 499-517 | DOI: 10.1080/00221686.2026.2643704

 Research Papers

Hydraulic Jump Aeration and Turbulent Dissipation on Beds Roughened by Rigid and Flexible Vegetation
Hong Hu, Hang Wang, Ruidi Bai & Lian Tang
Pages 518-537 | DOI: 10.1080/00221686.2026.2665207

A Retrofitting Solution for Geyser Eruptions in Storm Sewer Systems: Experimental and Numerical Analysis
Abbas Sharifi, Pratik Mahyawansi, Sumit R. Zanje & Arturo S. Leon
Pages 538-554 | DOI: 10.1080/00221686.2026.2672982

Flow Downstream of High-head Gates in Low-level Outlets with Tunnel Lateral Profile Transitions  
Simone Pagliara, Stefan Felder, Benjamin Hohermuth & Robert Michael Boes
Pages 555-576 | DOI: 10.1080/00221686.2026.2674201

Hydrodynamics of Step-pool Systems: a Cross-section Averaged Non-hydrostatic Rill-flow Model 
Francisco Nicolás Cantero-Chinchilla, Oscar Castro-Orgaz, Rafael Giménez, Juan Vicente Giráldez-Cervera & Luciano Mateos-Iñiguez
Pages 577-593 | DOI: 10.1080/00221686.2026.2667871

Laboratory Modelling of Landslide-induced Waves in a Water Reservoir
Mohammad Bagher Imani, Ehsan Delavari, Shamsa Basirat & Mohsen Saadat
Pages 594-607 | DOI: 10.1080/00221686.2026.2665204

Optimizing Lateral Intakes in River Bends Near Broad-crested Weirs: a Hydraulic Perspective
Mahtab Shayanmehr, Mohammad Hemmati, Hojjat Ahmadi, Leyla Mehrdar & Amin Seyedzadeh
Pages 608-622 | DOI: 10.1080/00221686.2026.2662307

On the Use of Distributed Optical Fibre Sensors to Complement Photogrammetric Measurements of Experimental Dike Breaching
Nathan Delpierre, Masoumeh Ebrahimi, Alex Bertholet, Alessandro Scaioli, Lorenzo Panzeri, Laura Longoni, Hadrien Rattez & Sandra Soares-Frazão
Pages 623-640 | DOI: 10.1080/00221686.2026.2654039

 Technical note

Modelling Void Fraction Distributions in Breaking Hydraulic Jumps  
Hong Hu, Hang Wang & Matthias Kramer
Pages 641-654 | DOI: 10.1080/00221686.2026.2662306

On Momentum and Energy Fluxes in Dam-break Waves  
Davide Wüthrich
Pages 655-662 | DOI: 10.1080/00221686.2026.2665206

A Conveyance Capacity Criterion for Stepped Dropshafts
Weichen Ren, Jianhua Wu, Fei Ma, Zihou Niu, Panhong Ren, Hongwei Zhang & Shangtuo Qian
Pages 663-672 | DOI: 10.1080/00221686.2026.2659762

Call for Papers

• Call for Papers for a Special Issue on Hydraulics of Sediment Transport and Scour
  Special Issue Editor: Professor Subhasish Dey

• Call for Papers for Breaching of Earthen Dam and Dike Structures: Lessons Learned from Recent Field, Laboratory, and Numerical Studies
  Special Issue Editors: Sandra Soares-Frazão, Sílvia Amaral and Matthew Halso

• Field observations of large hydraulic structures operating during floods.
  Guest Editor: Hubert Chanson

• Call for Articles for a JHR Special Issue on Sediment Transport in Large Rivers
  Guest Editor: Junqiang Xia