Balanço hídrico da Microbacia Hidrográfica do Rio Caiabi

Abstract

Knowledge of the various components of the hydrological cycle is an important prerequisite for the sustainable development of a region. This work studies the behavior of hydrometeorological variables, such as precipitation, evapotranspiration and flow, involved in the water balance of the hydrographic microbasin of the Caiabi river, which is located in the municipalities of Sinop and Vera - MT, between the coordinates of latitude 12 °25'0” S at 12°7'30” S, and longitude from 55°27'30” W to 55°17'0” W. It has a drainage area of 416.37 km², covering an area of approximately 70 km (ANDRIETTI et al., 2016). The average precipitation in the basin was calculated by the Thiessen method, using the ArcGis 10 software to determine the relative areas of the Thiessen polygon, and the potential evapotranspiration was calculated by the Camargo method, using daily data collected between the years 2016 and 2020. Meteorological data were obtained from the databases of three automatic meteorological stations (Davis Vantage Pro2), installed at different points in the microbasin. Through the values found for the variables involved in the water balance, average precipitation 1894.34 mm and evapotranspiration 1493.99 mm, it was possible to obtain the average flow of the hydrographic microbasin of the Caiabi river equal to 572.59 mm or 7.60 m3s- 1