hydrographn.
/ˈhʌɪdrəɡrɑːf//ˈhʌɪdrəɡraf/ΘΚΠ
society > communication > telecommunication > other types of sound telecommunication > [noun] > apparatus
telephone1832
electrophone1864
magneto-telephone1878
thermophone1878
photophone1880
radiophone1881
teleradiophone1881
thermotelephonea1884
telegraphophone1889
theatrophone1889
hydrograph1893
sonobuoy1937
1893 Westm. Gaz. 19 Oct. 7/3 (heading) Talking through the water. The wonders of the hydrograph.
2. A graph showing the variation of level, speed of flow, or another quantity at some point on a river. Originally U.S.
ΘΚΠ
the world > the earth > earth sciences > hydrography > [noun] > apparatus
marigraph1858
hydrograph1897
hydrowire1955
1897 Monthly Weather Rev. (U.S.) 25 129/1 Hydrographs for typical points on seven principal rivers are shown on Chart VI.
1936 Water-Supply Paper U.S. Geol. Surv. No. 771. 71 Among the graphic devices that have been widely used in the study of stream-flow data is the hydrograph of discharge, which depicts the average flows by days,..years, or other time intervals.
1969 Stud. & Rep. Hydrol. I. 125 A linear distributed-system model..predicts a flood hydrograph from rainfall information and catchment characteristics.
This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2020).
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