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English: Diagram of the water cycle including some human activity created for a schools outreach project by the Gro for GooD project, ...
The ocean plays a key role in the water cycle as it is the source of 86% of global evaporation. [2] The water cycle involves the exchange of energy, which leads to temperature changes. When water evaporates, it takes up energy from its surroundings and cools the environment. When it condenses, it releases energy and warms the environment.
The diagram also shows how human water use impacts where water is stored and how it moves. [1] The water cycle (or hydrologic cycle or hydrological cycle) is a biogeochemical cycle that involves the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time.
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The water balance equation relates the change in water stored within the basin (S) to its input and outputs: Δ S = P − E T − Q − D {\displaystyle \Delta S=P-ET-Q-D\,\!} In the equation, the change in water stored within the basin ( ΔS ) is related to precipitation ( P ) (water going into the basin), and evapotranspiration ( ET ...
English: Phase diagram of water as a log-lin chart with pressure from 1 Pa to 1 TPa and temperature from 0 K to 660 K, compiled from data in and . Note that the phases of Ice X and XI (hexagonal) differ from the diagram in .
English: Conceptual diagram of near-surface hydrology, showing evapotranspiration, evaporation, transpiration, runoff, and recharge processes. Date 1 October 2007