Hydrologist (noun)

A scientist who specializes in the study of water, including its distribution, movement and properties, in the Earth's atmosphere, surface and subsurface.

Origin:

Late 19th century: from hydro- + -logist.

Examples:

1. A hydrologist would study the water cycle and the movement of water in rivers and groundwater.
2. Hydrologists use mathematical models and remote sensing techniques to study water resources.
3. Hydrologists often work for government agencies, consulting firms, and research institutions.
4. Hydrologist can help to solve water-related problems such as drought, flooding and water pollution.
5. The hydrologist's work is important for managing water resources and mitigating the impacts of natural disasters.