EditorialLora Musian, a hydrologist from Mykolaiv oblast, measures water levels on a street flooded after the destruction of the Kakhovka dam in Kherson, Ukraine, June 9, 2023. (Brendan Hoffman/The New York Times)
EditorialWes Monier, chief hydrologist for Turlock Irrigation District, shows a photo from 1997 when floodwaters were released from the Don Pedro Reservoir through the dam's spillway, July 28, 2022. (Erin Schaff/The New York Times)
EditorialSherry Chen, an award-winning hydrologist at the National Weather Service who was arrested and accused of espionage by the Investigations and Threat Management Service before prosecutors dropped all charges without explanation, at her home in Wilmington, Ohio, April 1, 2015. (Maddie McGarvey/The New York Times)
EditorialGraham Sexstone, a research hydrologist, digs a pit to record temperature, snow density and other measurements near Loveland Pass, Colo., June 19, 2020. (Benjamin Rasmussen/The New York Times)