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hydrotechnologist
hydrotechnologist n.
Brit. 
/ˌhʌɪdrə(ʊ)tɛkˈnɒlədʒɪst/
, /ˌhʌɪdrə(ʊ)tɛkˈnɒlədʒɪst/U.S. /ˌhaɪdroʊtɛkˈnɑlədʒəst/
one versed in hydrotechny./ˌhaɪdroʊtɛkˈnɑlədʒəst/Π
1897 Geogr. Jrnl. 10 619 As to the physics of running water, hydrotechnologists have recognized the dependence of velocity on the declivity of the water surface and depth.
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