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Understanding the Hydrologic Cycle: The Water Journey on Earth

The hydrologic cycle is a continuous process driven by solar energy, illustrating the movement of water through various states. It begins with evaporation, where water is heated by the sun and converts into vapor. Plants contribute through transpiration, releasing water vapor from their leaves. As vapor rises, it cools and condenses into clouds. Wind transports these clouds to different regions, where precipitation occurs as rain, snow, or hail. The excess water flows as runoff into rivers and lakes, while some infiltrates the ground, replenishing groundwater sources.

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Understanding the Hydrologic Cycle: The Water Journey on Earth

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  1. Water Hydrologic Cycle

  2. http://www.atmos.uiuc.edu/earths_atmosphere/images/water_cycle/hydrologic_cycle2.jpghttp://www.atmos.uiuc.edu/earths_atmosphere/images/water_cycle/hydrologic_cycle2.jpg

  3. Solar Radiation • Almost all of the energy that drives the various systems, including the hydrologic system, found on the Earth originates from the sun

  4. Evaporation • As water is heated by the sun, it evaporates and rise as invisible vapour in the atmosphere.

  5. Transpiration • Water vapour is also emitted from plant leaves by a process called transpiration. Every day an actively growing plant transpires 5 to 10 times as much water as it can hold at once.

  6. Condensation • As water vapour rises, it cools and eventually condenses. These water particles then collect and form clouds

  7. Wind (transport) • Clouds move around the world, propelled by air currents.

  8. Precipitation • Precipitation in the form of rain, snow and hail comes from clouds.

  9. Runoff • Excessive rain or snowmelt can produce overland flow to creeks and ditches. Runoff is visible flow of water in rivers, creeks and lakes as the water stored in the basin drains out.

  10. Groundwater • Subterranean water is held in cracks and pore spaces. It can also be tapped by wells.

  11. Infiltration • When water falls on the ground as rain, hail or snow, it can soak into the ground – this process is called infiltration

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