A hydrologist is a scientist who studies the distribution, movement, and properties of water in the environment. They analyze how water interacts with the atmosphere, land, and living organisms. Their work is essential for managing water resources, predicting floods, and understanding the impacts of climate change on water systems. Hydrologists often use tools like computer models and field studies to collect data. They may work for government agencies, research institutions, or environmental organizations. Their findings help inform policies related to water conservation, pollution control, and sustainable development, ensuring that communities have access to clean and safe water.