Construct · 2 fields · 2 citations

Where does waterfall collide?

One name. Different field. Different construct. One map.

● jingle · one word, two constructs Nearest construct by meaning·not indexed
waterfall2 CONSTRUCTSWaterfall modelROYCE · 1970Waterfall (knickpoint)PLUNGE-POOL EROSION

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1970Waterfall model2017Waterfall (knickpoint)
2026

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Software engineering

A strictly sequential development model

In software engineering, the waterfall model is a development process in which work flows in one direction through fixed, sequential phases (requirements, design, implementation, testing, and maintenance), each finished and signed off before the next begins, like water falling step by step and never flowing back up. Royce's 1970 Managing the development of large software systems laid out this staged picture (while actually warning that iteration between phases is necessary), and later writers named the cascade the "waterfall." The referent is a sequential, document-driven project lifecycle, and it has nothing to do with a cascade of creditor payments or an eroding river step beyond the shared image of flowing downward in stages.[1]

Unit
The ordered set of development phases, each gating the next
Recovery means
Not applicable
Measured by
Tracked by phase completion, sign-off gates, and requirements traceability through the lifecycle

Geomorphology

A vertical step where a river erodes headward

In geomorphology a waterfall is a steep step in a river's long profile (a knickpoint) where water plunges over resistant rock and scours a plunge pool at its base, and the step migrates upstream as erosion undercuts and collapses the lip. Scheingross and Lamb's 2017 A mechanistic model of waterfall plunge pool erosion into bedrock models how the plunging jet excavates the pool and controls how fast the waterfall retreats. The referent is a landform and an erosional process in a bedrock channel, measured by drop height, plunge-pool depth, and retreat rate, and it is unrelated to a project schedule or a payout rule beyond the literal falling of water.[2]

Unit
The drop height, plunge-pool depth, and headward retreat rate
Recovery means
Not applicable
Measured by
Quantified by waterfall height, plunge-pool scour depth, and upstream knickpoint migration rate

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Nearby collisions

tranche1 fields · 1 citationsanchor · single construct, one fieldaftereffect2 fields · 2 citationsjingle · one word, two constructsbase3 fields · 4 citationsjingle · one word, three constructs

References

  1. Royce, W. W. (2021). Managing the development of large software systems. In H. R. Lewis (Ed.), Ideas that created the future: Classic papers of computer science. The MIT Press. (Original work published 1970) https://doi.org/10.7551/mitpress/12274.003.0035
  2. Scheingross, J. S., & Lamb, M. P. (2017). A mechanistic model of waterfall plunge pool erosion into bedrock. Journal of Geophysical Research: Earth Surface, 122(11), 2079–2104. https://doi.org/10.1002/2017jf004195

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