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  3. Mining & Minerals / Gems

riffle

French translation: riffle

10:39 Mar 5, 2024
English to French translations [PRO]
Tech/Engineering - Mining & Minerals / Gems / mine design
English term or phrase: riffle
The waste dumps will be lined with impervious material, either clay from the operation or heavy-duty plastic. The surface above this zone will be designed as a higher area than the remainder of the dump to limit rainwater infiltration. An armoured spillway will be formed from the top and down the side of the dump. Water will be encouraged to seep into the main dump of non-acid forming (NAF) material to limit erosion potential. The outer limit of the dump will be formed of saprolite material to encourage voluntary colonisation by endemic flora. Fresh rock will be placed internally to the weathered waste material. The final angle of the slopes will be below the slump angle of the material. Where necessary, areas can be armoured and riffles placed to decrease the velocity of water egress.
Neydou
France
Local time: 14:40
French translation:riffle
Explanation:
https://www.goldlineorpaillage.fr/riffle-rampe-tapis-orpaill...
Selected response from:

david henrion
France
Local time: 14:40
Grading comment
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +2riffle
david henrion
4 +1séquence mouille-rapide / mouille-radier
Bourth


  

Answers


24 mins   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +2
riffle


Explanation:
https://www.goldlineorpaillage.fr/riffle-rampe-tapis-orpaill...

david henrion
France
Local time: 14:40
Works in field
Native speaker of: Native in FrenchFrench
PRO pts in category: 8

Peer comments on this answer (and responses from the answerer)
agree  Jennifer Levey
1 hr
agree  Anastasia Kalantzi: https://www.lefouilleur.fr/fr/blog/post/les-pans-et-battees....
3 hrs
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4 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +1
séquence mouille-rapide / mouille-radier


Explanation:
For me, they are talking about the 'natural' (modified) environment here, not systems for recovering mineral particles in some sort of sluice. A 'mechanical' riffle used for this purpose uses the principle of natural riverbed riffles.

Riffles are the shallower, faster moving sections of a stream. Look for areas with a fast current where rocks break the water surface. That's a riffle. Riffles are important to fish habitat. As water rushes over the rocks it adds oxygen to the water.
https://www.fs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb50428...

What is the difference between pools and riffles?
Pools are deep with slow water. Riffles are shallow with fast, turbulent water running over rocks. Runs are deep with fast water and little or no turbulence..
https://www.lakesuperiorstreams.org/understanding/riffle_run...

While various sources present different flow régimes as separate entities, e.g. …
Une mouille est souvent délimitée par un ou deux seuils (ou radiers) naturels ou artificiels, dont elle est l'antonyme. Très souvent, des plats s'intercalent entre mouilles et radiers dans les portions rectilignes. Une succession de faciès (rapides, plats, radiers, mouilles) est appelée une séquence. [Wikipedia]

…I would suggest that just as you can't have 'good' without 'bad', you can't have riffles without pools (or some other flow régime) (see 'sections' above). The Cartesian French might insist on the notion of séquence as above and assemblage régulier des faciès d’écoulement as below..

Séquences mouilles-rapides (pool riffle, voir figure 4.26) : lorsque des bancs de gravier se forment sur des lits en pente douce i < 1,5 % et des graviers fins (d50 < 3 cm), le cours d’eau présente à la fois une sinuosité et une ondulation de son lit qui se caractérisent par la présence de mouilles (écoulements lents et profonds) et de rapides (écoulements peu profonds et plus rapides).
https://fr.ancey.ch/cours/postgrade/cours-postgrade.pdf

Les « segments » et les « séquences » sont des unités morphologiques homogènes. Ces unités résultent de l’assemblage régulier des faciès d’écoulement décrits ci-après. Par exemple, les séquences « mouilles-seuils », « mouilles-radiers », « mouilles-rapides », « mouilles-rapides-plat », « chenaux-plats lentiques », etc. [ … ] On reconnaît en général quatre faciès d’écoulement susceptibles d’abriter les jeunes saumons : les radiers (riffles, en anglais), les rapides (rapids), les plats (runs) et les mouilles (pools) (Gibson, 1993; johnston, 2002).
https://www.saumonquebec.com/media/2377/de-veloppement-des-s...

Whether séquences mouilles-rapides as above corresponds precisely to 'riffle' I cannot say. Séquences mouilles-radiers is also tempting. I'm not sure rapides works in isolation, and radier in isolation could be taken to be several different (manmade) things entirely in terms of river hydraulics.


Bourth
France
Local time: 14:40
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 64

Peer comments on this answer (and responses from the answerer)
neutral  david henrion: Pour moi ces séquences sont des formations naturelles alors que les riffles sont des structures artificielles installées pour freiner l'écoulement.
8 mins
  -> On peut créer des 'séquences' avec des matériaux naturels. C'est le genre de chose dont toute entreprise va se vanter dans sa comm RSE. Reste à savoir ce qu'ils font, précisément, tout comme "encourage voluntary colonisation by endemic flora"..
neutral  Anastasia Kalantzi: La même chose avec david henrion.
1 hr
agree  Daryo: yes, but in this ST it's only about "radiers", not the whole combination "mouille + seuils (ou radiers)"
2 days 2 hrs
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