Minggu, 09 Mei 2010

HYDROLOGICAL CYCLE

Hydrological Cycle:
is the circulation of water that never stops from the atmosphere to earth and back into the atmosphere through condensation, precipitation, evaporation and transpiration.

Warming ocean water by sunlight is the key process of the hydrologic cycle can run continuously. Berevaporasi water, then fall as precipitation in the form of rain, snow, hail, sleet and snow (sleet), light rain or mist.
On the way to earth some precipitation may berevaporasi back to the top or fell in the later intercepted by plants before it reaches the ground. After reaching land, the hydrologic cycle continues to move in a continuous in three different ways:
• Evaporation / transpiration - water that is at sea, on land, in rivers, in plants, etc.. will then evaporate into the air (atmosphere) and then going into the clouds. In the state of saturation water vapor (clouds) it will be water spots and then it will go down (precipitation) in the form of rain, snow, ice.
• Infiltration / Percolation into the ground - Water moves into the soil through cracks and pores of the soil and rocks into the ground water. Water can move due to capillary action or water can move vertically or horizontally below the soil surface until the water is re-entering the surface water system.
• Surface Water - Water moving over the soil surface close to main stream and lake; more sloping land and fewer and fewer of the pores of the soil, the greater the surface flow. Soil surface flow can be seen usually in an urban area. The rivers join each other and form a major river that brings the entire surface of the water surrounding watershed into the sea.
Surface water, either flowing or stagnant (lakes, reservoirs, marshes), and part of subsurface water will be collected and forms a stream flowing into the sea and ends. Process water trip on the mainland occurred in the hydrologic cycle components that form consistently Watershed (DAS). The amount of water on earth as a whole is relatively fixed, that's changed is the form and place.

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