Análise do balanço hídrico para a captação de água da chuva utilizando técnicas de sensoriamento remoto e SIG

Abstract

The climate in the Brazilian semi-arid region is characterized by an average current that ranges from 400 to 800 mm, with rainfall occurring between January and July, but it is becoming disconnected. The absence of delay during the dry season causes the values of the reservoirs and artificial lakes to decrease one point of drying completely. In order to determine the water balance in the semi-arid region of Piauí, precipitation and evapotranspiration information were collected between January and December 2018 through remote sensing. The rainfall values showed that the monthly average was 74,5 mm/month, totaling 891 mm in the year, although this combination was not made in the entire territory. The annual potential evapotranspiration was 1,619 mm, with a monthly average of 134,92 mm. The region presented a water deficit of ten months of the year, only those with a positive one-year readiness, with 94 and 41 mm, respectively. For this purpose, the growth rate of rainfall and water catchment conditions and shear rates can be high due to the high and deep evapotranspiration rates.