The diagram illustrates the natural process of the water cycle, which represents how water continuously moves on, above, and below the Earth’s surface.
Overall, the water cycle has several key stages: evaporation, condensation, precipitation, and runoff. It is also clear that the ocean plays the huge role in the water cycle, contributing about 80% of total water vapour in air.
The cycle begins with evaporation, where water from the ocean and other water bodies, such as lakes, turns into vapor due to the solar heat. As the vapor rises, it cools and condenses into clouds. When the clouds become saturated, precipitation occurs in the form of rain or snow, returning water to the Earth’s surface.
Once precipitation reaches the ground, it follows different paths. Some water flows over the surface as runoff, filling rivers and lakes, while some seeps into the ground, becoming groundwater. However, an impervious layer prevents further passage in certain areas. Additionally, the diagram highlights saltwater intrusion, a process where saltwater from the ocean mixes with freshwater, which can affect groundwater quality.
Overall, the water cycle is a continuous and dynamic process essential for maintaining Earth’s water supply. Human activities, such as pollution and excessive groundwater extraction, can disrupt this cycle, emphasizing the need for sustainable water management.