Hydrology is the study of water on, above, and beneath the Earth’s surface. It examines the distribution, movement, and quality of water in rivers, lakes, groundwater, and the atmosphere. Hydrologists explore the water cycle, including processes like precipitation, evaporation, infiltration, and runoff. This science is crucial for managing water resources, predicting floods and droughts, and addressing water-related environmental issues. Hydrology supports sustainable practices for agriculture, industry, and urban development while ensuring clean and safe water for ecosystems and communities. By understanding hydrology, we can better protect this vital resource and balance the needs of nature and human society.