Evidence map›Paper›PMID 42162174›Full record

ArticleScientific reports2026

Spacing effects of discrete bed roughness on sequent depth, jump length, and energy loss in hydraulic jumps.

Hossein Sohrabzadeh Anzani, Sameh Ahmed Kantoush, Sohei Kobayashi

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Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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0citing papers in PubMed
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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Hossein Sohrabzadeh AnzaniWater Resources Research Center, Disaster Prevention Research Institute, Kyoto University, Uji, 6110011, Japan. sohrabzadehanzani.hossein.27t@st.kyoto-u.ac.jp.
Sameh Ahmed KantoushWater Resources Research Center, Disaster Prevention Research Institute, Kyoto University, Uji, 6110011, Japan.
Sohei KobayashiWater Resources Research Center, Disaster Prevention Research Institute, Kyoto University, Uji, 6110011, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study examines the effect of roughness spacing on the characteristics of hydraulic jumps in open-channel flows, based on experimental results in a rectangular flume with a smooth bottom and three different sets of discrete roughness (spacingsS = 12 cm, 24 cm, and 46 cm; fixed heightK = 2 cm). Tests were conducted with supercritical incoming flows at discharges of 15, 20, and 25 L/s. Flow visualization revealed regime transitions from skimming-like flow at close spacing (S/K = 6) to wake-interference at intermediate spacing, and wake-type hydraulic jumps at the largest spacing (S/K = 23), with increasing discharge promoting unsteady wake-jump interactions, surface rolling, and enhanced turbulence. Results show that increasing roughness spacing significantly reduces relative jump length (L

Indexed as

Bed roughnessConjugate depth ratioHydraulic jumpOpen-Channel flowRelative jump length

Identifiers

PMID42162174
PMCPMC13389074

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LicenceCC BY-NC-ND
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.