Body of water
A body of water is a significant accumulation of water on or beneath Earth’s surface, including lakes, rivers, seas, and aquifers.
Hydrology: The study of water’s movement, distribution, and properties on Earth and other planets. It provides the broad framework for understanding water bodies and their connections.
Hydraulic head: The energy level of groundwater, expressed as the height water would rise in a well. Differences in head drive groundwater through aquifers and toward springs.
Water resources: Water available for human use and ecological needs, including surface water and groundwater. Bodies of water are major sources managed as shared resources.
Canal: An artificial waterway built to carry water or provide a route for boats. Unlike most water bodies, a canal is a deliberately constructed passage.
Pacific Ocean: The largest and deepest of Earth’s ocean basins, extending between Asia, Australia, and the Americas. It exemplifies a vast, interconnected marine body of water.
Hydrosphere: All water on, beneath, and above Earth’s surface, including ice and atmospheric vapor. Water bodies are distinct parts of this planet-wide reservoir.
Groundwater flow: The movement of water through saturated soil and permeable rock. It governs how subsurface water bodies receive and release water.
Reservoir: A natural or artificial lake that stores water for later use. Reservoirs are managed water bodies that support supply, irrigation, and hydropower.
Drainage basin: The land area that collects precipitation and drains it to a shared outlet. It is the land supplying a water body, not the accumulated water itself.
Lake Baikal: A rift lake in Siberia and the world’s deepest freshwater lake. Its exceptional depth and freshwater volume illustrate the diversity of lakes.