[ hahy-druh-graf, -grahf ]
/ ˈhaɪ drəˌgræf, -ˌgrɑf /
a graph of the water level or rate of flow of a body of water as a function of time, showing the seasonal change.
Origin of hydrograph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
/ (ˈhaɪdrəˌɡrɑːf, -ˌɡræf) /
a graph showing the seasonal variation in the level of a body of water, from which its velocity and discharge can be calculated
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012