A hydrologist is a scientist who studies water in the environment, including its movement, quantity, and quality. There are several other terms that can be used to describe a hydrologist, including water resource specialist, hydrogeologist, hydrological engineer, aquatic chemist, and water management expert. These synonyms reflect the diverse nature of the discipline, which encompasses both fieldwork and laboratory analysis. Hydrologists may work for federal agencies, state governments, or private consulting firms, and their research may focus on areas such as groundwater management, flood control, or water pollution. Regardless of their specific area of expertise, hydrologists play a crucial role in ensuring the sustainability and safety of our water resources.