Construct · 1 fields · 1 citations

antecedent moisture condition: a standalone construct

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

● anchor · a single construct in hydrology Nearest construct by meaning·not indexed
antecedentmoisture condition1 CONSTRUCTAntecedent moisturePONCE · CURVE NUMBER

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

Hydrology

How wet a catchment is before a storm

Antecedent moisture is the amount of water already stored in a catchment's soils before a rainfall event; wetter prior conditions leave less room for infiltration, so the same storm produces more runoff. In the SCS curve-number method it is handled through antecedent moisture (or runoff) conditions that shift the curve number up or down. Ponce and Hawkins's 1996 Runoff curve number: Has it reached maturity? critically reviewed the method, including how antecedent conditions are represented and the ambiguity they introduce. The referent is the pre-storm wetness state of a watershed that modulates its runoff response.[1]

Unit
Pre-event soil water content, or an index of prior wetness (e.g. the antecedent precipitation index)
Recovery means
Not applicable
Measured by
Indexed by prior-period rainfall (antecedent precipitation index) or measured soil moisture, or binned into SCS antecedent moisture classes

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Nearby constructs

evapotranspiration1 fields · 2 citationsanchor · a single construct in hydrologyambiguity5 fields · 6 citationsjingle · one word, five constructs

References

  1. Ponce, V. M., & Hawkins, R. H. (1996). Runoff curve number: Has it reached maturity? Journal of Hydrologic Engineering, 1(1), 11–19. https://doi.org/10.1061/(ASCE)1084-0699(1996)1:1(11)

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