<img src="baniereBedloadWeb.png" width="100%"/>

Français

English

Español

Browse...

Project description

Français English Español

Wolman

Browse...

0.5Ψ Ψ Free

Export

Browse...

Reach

Browse...

T=1/FD

FD=1-FND

FD(j/an)=(1-FND)*365

l/s m3/s

s mn h

FND FD T

Step-pool:

Hidden Checkbox

H Q

save figure

H(m)

Q(m3/s)

Coef K

Browse...

D50 D84

Section

H (m)

Q (m3/s)

H Q

Options:

X log

Y log

Ackers-White: Agr=

Bagnold: ωc=

Camenen & Larson: τc*=

Lefort: q0=

Meyer-Peter & Muller: τc*=

Parker: τc*=

Parker90: τr*=

Recking: τm*=

Rickenmann: qc=

Schocklitch: qc=

Smart & Jaeggi: τc*=

Van Rijn: uc*=

Wilcock & Crowe: τr*=

Wong & Parker: τc*=

ρ(kg/m3)=

ρs(kg/m3)=

ρs_app(kg/m3)=

D50(%)

D84(%)

ρ(%)

ρs(%)

Wilcock and Crowe Parker GTM

β=0.5, γ2=1.5

β 

γ2 

β=2, γ2=20

β 

γ2 

γ2

β 

γ2 

Tfm/Tc*:

Browse...

γ2

φ0

γ0

γ1

Tfm/Tc*:

γ2

Q(m3/s)

Browse...

g Kg m3 t

FND FD T

Log

Version 5 - January 2026

Alain Recking

Sylvain Duchene

Eric Maldonado

Daniel Vazquez Tarrio

INRAE, UGA, IGE, Domaine universitaire 2 rue de la Papeterie, BP 76, 38 402 Saint-Martin-d Heres cedex

Recking, A., A. Johannot, K. Horita, M. Nasr, D. Vázquez-Tarrío, S. Zanker, F. Fontaine and G. Melun (2024), An Attempt to Take Into Account Natural Variability in 1D Bedload Prediction. Journal of Geophysical Research: Earth Surface 129(7): e2023JF007601 https://doi.org/10.1029/2023JF007601

Notation

ω ω=τU

Φ: , Φ=qsv/sqrt(g(s-1)D^3)

Ψ: , Ψ=LogD/Log2, D=2^Ψ

, Qsapp=ρ/ρapp*Qs

Re=UR/ν

ρ:

ρs:

, s=ρs/ρ

τ:

τc:

τ: ; τ=τ/(g(ρs-ρ)D) <=> τ*=RS/((s-1)D)

τc: ; τc=τc/(g(ρs-ρ)D)

, u*=sqrt(τ/ρ)

Other tools

X log

Y log

q H τ τ* τ*/τ*c ω

qs Φ

τ*c=

τ*(D50) , Φ(D50)

Q H

D50(%)

D84(%)

ρ(%)

ρs(%)

Wilcock and Crowe Parker GTM

β=0.5, γ2=1.5

β
τ*/τ*c<1)

γ2

β=2, γ2=20

β
τ*/τ*c<1)

γ2

β
τ*/τ*c<1)

γ2

D50 (mm):

D84 (mm):

q (m3/s/m):

**τ/τc**

Measurement technique Morphology

Morphology

Morphology Braiding Canal Plane Bed Riffle-pool Sand bed Step-pool

Measurement technique

Measurement technique Laboratoire Basket Sampler Elwha sampler Helley-Smith 150 mm Helley-Smith 76 mm Nozzle 99x55mm Pit trap (Birkbeck type) Sediment trap Settling basin Toutle sampler TR2 Trap with endless belt Vortex VuV Sampler

D50 D84

q H τ τ* τ*/τ*c ω

qs Φ

X log

Y log

Q H

E10

Button below must be used ONLY if you have added new data in the data set.

It will generate the full GSD to be used for fractional transport with the Wilcock & Crowe or Parker equations

You must repeat the operation twice:

- first without clicking 'Suppress the sand fraction for calculation with Parker 90' above; it generates file GSFfi.txt

- second, after cliking 'Suppress the sand fraction for calculation with Parker 90' above; it generates file GSFfi_Par.txt

Both files muts be copied in folder /data

Be patient it takes a few minutes to complete

Download