Hydrologists are scientists who study the distribution, movement, and properties of water in the environment. They analyze water sources such as rivers, lakes, and groundwater to understand how water interacts with the atmosphere and land. Their work is essential for managing water resources, predicting floods, and ensuring clean water supply. These professionals often use tools like computer models and field studies to collect data. They may work for government agencies, environmental organizations, or private companies. Hydrologists play a crucial role in addressing issues related to climate change, water quality, and sustainable water management.