Construct · 1 fields · 1 citations

lahar: a standalone construct

One name. One construct. A landmark on the map.

● anchor · one field, one construct Nearest construct by meaning·not indexed
lahar1 CONSTRUCTLaharVALLANCE · DEBRIS FLOW

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Volcanology

A fast flow of water and volcanic debris down a volcano

A lahar is a rapidly flowing mixture of water and volcanic debris that moves down the slopes and valleys of a volcano, behaving like wet concrete that can travel far beyond the volcano itself. Lahars form when eruptions melt snow and ice, when crater lakes break out, or when heavy rain remobilises loose ash and rock, and Vallance and Iverson's 2015 treatment describes how they transform between debris-flow and more dilute states as they move and deposit. The referent is a volcanic flow hazard defined by its sediment-water mixture and mobility, distinct from the fall deposits and lava flows of an eruption.[1]

Unit
The volume, sediment concentration, and runout of a volcanic debris flow
Recovery means
Not applicable
Measured by
Characterised by flow volume and sediment concentration, peak discharge, runout distance, and deposit sedimentology

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Nearby constructs

tephra1 fields · 1 citationsanchor · one field, one constructbreak2 fields · 4 citationsjingle · one word, two constructscrater1 fields · 1 citationsanchor · a standalone construct

References

  1. Vallance, J. W., & Iverson, R. M. (2015). Lahars and their deposits. In H. Sigurdsson (Ed.), The encyclopedia of volcanoes (2nd ed., pp. 649–664). Academic Press. https://doi.org/10.1016/B978-0-12-385938-9.00037-7

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