Shields curve
E261325
The Shields curve is a dimensionless graph in sediment transport theory that defines the critical shear stress needed to initiate motion of sediment particles on a bed.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Shields criterion | 1 |
| Shields curve canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2361998 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Shields curve Context triple: [Einstein bed-load function, relatedTo, Shields curve]
-
A.
Shields
Shields is a common English and Irish surname borne by numerous notable individuals across politics, sports, entertainment, and public life.
-
B.
Page curve
The Page curve is a theoretical prediction in black hole physics that describes how the entanglement entropy of Hawking radiation should rise and then fall over time if black hole evaporation is ultimately unitary.
-
C.
Dominant Curve
Dominant Curve is an abstract painting by Wassily Kandinsky that exemplifies his exploration of color, form, and spiritual expression in early 20th-century modern art.
-
D.
Goodman–Martínez–Thompson correlation
The Goodman–Martínez–Thompson correlation is the most widely accepted scholarly conversion formula that aligns dates in the ancient Maya Long Count calendar with the Gregorian calendar.
-
E.
Ehrenstein
Ehrenstein is a locality or district that forms part of the municipality of Blaustein in the state of Baden-Württemberg, Germany.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Shields curve Target entity description: The Shields curve is a dimensionless graph in sediment transport theory that defines the critical shear stress needed to initiate motion of sediment particles on a bed.
-
A.
Shields
Shields is a common English and Irish surname borne by numerous notable individuals across politics, sports, entertainment, and public life.
-
B.
Page curve
The Page curve is a theoretical prediction in black hole physics that describes how the entanglement entropy of Hawking radiation should rise and then fall over time if black hole evaporation is ultimately unitary.
-
C.
Dominant Curve
Dominant Curve is an abstract painting by Wassily Kandinsky that exemplifies his exploration of color, form, and spiritual expression in early 20th-century modern art.
-
D.
Goodman–Martínez–Thompson correlation
The Goodman–Martínez–Thompson correlation is the most widely accepted scholarly conversion formula that aligns dates in the ancient Maya Long Count calendar with the Gregorian calendar.
-
E.
Ehrenstein
Ehrenstein is a locality or district that forms part of the municipality of Blaustein in the state of Baden-Württemberg, Germany.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
bedload initiation criterion
ⓘ
dimensionless graph ⓘ sediment transport criterion ⓘ |
| appliesTo |
bedload transport initiation
ⓘ
noncohesive sediment ⓘ sediment particles on a bed ⓘ uniform sediment beds ⓘ |
| assumes |
fully developed turbulent boundary layer for larger particles
ⓘ
steady uniform flow ⓘ |
| basedOn | laboratory flume experiments ⓘ |
| characterizes |
incipient motion conditions
ⓘ
threshold of motion of sediment grains ⓘ |
| defines | critical shear stress for initiation of sediment motion ⓘ |
| dependsOn |
bed roughness regime
ⓘ
fluid density ⓘ fluid viscosity ⓘ grain size ⓘ sediment density ⓘ |
| field |
fluvial hydraulics
ⓘ
geomorphology ⓘ hydraulic engineering ⓘ sediment transport theory ⓘ |
| hasAxis |
dimensionless shear stress axis
ⓘ
particle Reynolds number axis ⓘ |
| hasLimitation |
derived mainly for plane beds
ⓘ
less accurate for cohesive sediments ⓘ less accurate for highly irregular grain shapes ⓘ |
| influencedBy |
bed packing
ⓘ
bed slope ⓘ grain shape ⓘ |
| introducedBy | Albert F. Shields ⓘ |
| isBasisFor |
critical shear stress parameterizations
ⓘ
many sediment transport formulas ⓘ |
| isOftenModifiedAs | corrected Shields curves for natural sediments ⓘ |
| relates |
Shields parameter to boundary Reynolds number
ⓘ
dimensionless shear stress to particle Reynolds number ⓘ |
| usedFor |
channel stability analysis
ⓘ
design of hydraulic structures ⓘ prediction of sediment transport onset ⓘ river engineering calculations ⓘ scour prediction ⓘ |
| usesParameter |
Shields parameter
ⓘ
dimensionless shear stress ⓘ particle Reynolds number ⓘ |
| validFor | subcritical flow conditions ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Shields curve Description of subject: The Shields curve is a dimensionless graph in sediment transport theory that defines the critical shear stress needed to initiate motion of sediment particles on a bed.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Shields curve