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hydrograph

hydrograph

7.6
A chart that shows how the flow of a river or stream changes over time
  • noun
  • /ˈhaɪdrəˌɡræf/
  • Specialized
translation icon : hidrograma
  • By studying the hydrograph, researchers can predict flooding by looking at past flow changes.

Examples

  • Thus, streams draining naturally arid, deforested, or heavily urbanized areas are well known for the flashiness of their hydrographs.

    Academic text (2006)
  • Collectively, overland and shallow subsurface flow pathways create the peaks in the hydrograph that are a river's response to storm events, whereas deeper groundwater pathways are responsible for baseflow.

    Academic text (1997)
  • Collectively, overland and shallow subsurface flow pathways create hydrograph peaks, which are the river's response to storm events.

    Academic text (1997)
  • During cold periods, when there is no meltwater source from the glacier, the recession of the hydrograph is controlled primarily by drainage of the hyporheic zone (Conovitz et al. 1998).

    Academic text (1999)
  • For example, in human-altered rivers that are managed for incremental improvements, restoring a flow pattern that is simply proportional to the natural hydrograph in years with little runoff may provide few, if any, ecological benefits, because many geomorphic and ecological processes show nonlinear responses to flow.

    Academic text (1997)
  • The hydrograph displayed how the river's flow varied throughout different seasons.

  • Scientists use a hydrograph to analyze how rainfall affects river levels over time.

Synonyms

plot
vshydrograph
36 3.6

A graph that shows how numbers change over time

is specific to river or stream flow changes over time

Surface Forms

hydrograph singular
hydrographs plural

Morphology

hydrograph = graph (semi-transparent) = hydro + graph

The meaning is largely predictable as 'water' plus 'chart/diagram', but the hydrology sense is somewhat technical.

Etymology

The word hydrograph comes from the parts hydro- meaning 'water' and -graph meaning 'a record', the same -graph in autograph and photograph. So a hydrograph is a chart that records how a river's water flow changes over time.