Granulometry of the soil, water percolation and transpiration of the vegetated area in the campus Duse Rüegger Ometto - FHO - Fundação Hermínio Ometto, Araras-SP

Abstract

The work was realized at the Duse Rüegger Ometto campus, from Herminio Ometto Foundation in Araras, SP, with the finality of correlate the granulometry distribution of the soil and its permeability with the capacity of evapotranspiration from the vegetated area, by the worked method of Biudes (2006) and its relation with the local microclimate. To the collect of the soil samples were used an articulated excavator and a laser thermometer to measure the temperature of the sampling in the moment of the collection. Three samples were collected in each point with depth varying between 0-20 cm, 20-40 cm and 40-60 cm. To the determination of the evapotranspiration the areas were obtained by two methodologies, the first made in loco with 30 meters measuring tapes, and the second, delimited by satellites and calculated with the AutoCad software. The soil, through the analysis obtained, is constituted predominant by thin and medium sand with low significance of clay. The method to calculate the transpiration potential in conditions adopted and described during the experiment revealed the obtained valuo of 34,7 m³. 24 hours -1 represents a very large amount of water. It is concluded that plants transpiration can be effective to the microclimate maintainence and it is.