hydrograph

American  

[hahy-druh-graf, -grahf] / ˈhaɪ drəˌgræf, -ˌgrɑf /

noun

1. a graph of the water level or rate of flow of a body of water as a function of time, showing the seasonal change.

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hydrograph British  

/ ˈhaɪdrəˌɡrɑːf, -ˌɡræf /

noun

1. a graph showing the seasonal variation in the level of a body of water, from which its velocity and discharge can be calculated

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Etymology

Origin of hydrograph

First recorded in 1890–95; hydro- ¹ + -graph

Example Sentences

Willow Payne kept an eye on data from a hydrograph upstream in Arlington and posted updates to the town’s private Facebook group.

From Seattle Times

Spring, if you’re a boater, always comes with the fragile dream of following the hydrograph, watching for the spike of runoff, trying to predict your risk and your rush as you hope that snowmelt and spring rains have provided the depth to make your way downstream.

From Washington Post

Hydrograph forecasts are being continuously updated, Stay tuned...

From Los Angeles Times