Surface air flow in the Cauca river valley


The wind is air in movement; Therefore, when talking about this phenomenon, reference is made to the horizontal movement of air. At the surface, air tends to flow from areas of high pressure to areas of low pressure. The trade winds are a clear example of this. The trade winds flow from the mid-latitude high-pressure systems in the north and south toward the quasi-constant equatorial low-pressure system. Another example of this is the circulation cells on the coasts, in which the difference in thermal properties between the ocean and the continent generates sea-land breezes during the day and land-sea breezes at night, in response to changes in temperature. and surface pressure.

Among the factors that influence agriculture, wind has been considered only for its role as an input in the equation to generate evapotranspiration values ​​(e.g., Allen, 1998) and to establish risk zones due to the mechanical effect of wind. on cultivated plants, agricultural infrastructure and soil (wind erosion). In such situations, the vector nature of this variable is left aside and it is preferred to consider it as scalar, that is, as a value of air flow speed, or maximum gust in some cases. Consequently, for agronomists, and in general for production biologists and even for agricultural engineers, the concept of wind field, widely used by environmental engineers, is not common.

The wind field is nothing other than the spatial pattern of the wind, that is, the direction and speed of the prevailing wind in a locality or region at a given time. The results reported here correspond to the analysis, on different time scales, of the wind speed and direction data recorded at the stations of the meteorological network of the sugar-energy sector, the details of which are presented in the chapter that describes the variables. meteorological. In the network stations, the wind sensor is located 10 m high above the surface, contrary to agroclimatic type stations, in which the sensor is located 2 m high. The programming of controlled agricultural burning is the reason for the location of wind sensors in agribusiness stations.

About the authors

Preciado Vargas, M.

Civil and Geomatic Engineering from the Universidad del Valle, Colombia.

Peña Quiñonez, AJ

Agricultural Engineer, Master in Meteorology from the National University of Colombia; PhD in Biological and Agricultural Engineering from University State Washington. Work Experience as Head of Agrometrology Service at CENICAÑA.

Related content

Scroll to Top