Hydrologic cycle pdf

Not only is the hydrologic cycle a cycle of water, it is a cycle of. There are six major components of this cycle : evapotranspiration, condensation, precipitation, infiltration, percolation and runoff. The hydrological cycle is the system which describes the distribution and movement of water between the earth and its atmosphere.

The model involves the continual circulation of water between the oceans, the atmosphere, vegetation and land. The second phase is the terrestrial phase , which describes water movement in, over, and through the Earth. The hydrologic cycle describes the contin- uous movement of water above, on, and below the surface of the Earth.

Surface water also includes the solid forms of water— snow and ice. It connects the atmosphere and two storages of the earth systethe oceans,. The knowledge of hydrology is necessary to perform design, operation and maintenance of the water resource engineering projects. Hydrology is the study of occurrence and. It also travels through soil and rock as groundwater.

There is times as much fresh water below ground than in lakes, rivers and inland seas. By the rays of the sun, the waters of the ocean, rivers, canals etc. The watery vapour is the reservoir of hydrological cycle.

The role of different processes in the hydrological cycle and their description depends on the chosen spatial-temporal scales. At its core, the water cycle is the motion of the water from the groun to the atmosphere, and back again. All of the water on our planet is recycled and a given molecule of water is used over and over throughout time. The elements of the hydrologic cycle that will be discussed in this Chapter are the statistical rainfall patterns and the response characteristics of the natural and developed landscapes. HYDROLOGIC CYCLE is the series of conditions through which water changes from vapor in the atmosphere through precipitation upon land surface or water surfaces and ultimately back into the atmosphere as a result of evaporation and transpiration.

This first unit for this module plays an important part in setting the stage and context for the units that follow. By using the traditional hydrologic cycle as the starting point, the students are reminded of the basic components of the hydrologic cycle and the various reservoirs, fluxes, and residence times that make up the cycle. Environmental scientists know that the hydrologic cycle includes various processes that change water from solid to liquid to gas form and transport it to every corner of earth’s surface (and below).

The transport of water between these reservoirs in various phases plays a central role in the Earth’s climate. This process could be called the earth’s water circula-tion system. Local occurrence, quantity, and quality can be modified to some degree, but water is not destroyed by human activity. The concept of the hydrological cycle also suffered from stagnation over the same period. From the time of Plato and Aristotle in the fourth century B. Renaissance in the seventeenth century A. The global hydrological cycle.

The cycle transports runoff from rivers and streams, by subsurface movement through aquifers, through animals, plants, and other organisms, through the soil, and stores water in oceans, lakes, and glaciers. The energy for driving this cycle comes from the sun. As moist air is lifte it cools and water vapor condenses to form clouds.

Moisture is transported around the globe until it returns to the surface as precipitation. Water evaporates from oceans and lakes.