ESTIMATIVA DE VOLUME DE ÁGUA EM AÇUDE RURAL UTILIZANDO GEOTECNOLOGIAS

Abstract

Knowledge of the capacity of the volume of water stored in the pond is essential for water management. In order to quantify the value of the water volume of already constructed reservoirs or the submerged surface modeling, bathymetric survey techniques are used with GPS and Ecobatímetro when the reservoirs are full. The objective of this work was to test the RTK GNSS receiver coupled to geotechnologies as a method to determine the volume of the rural reservoir, comparing the results with traditional methods. The study area corresponds to the hydraulic basin of the Preto reservoir, being located in the experimental farm of the National Semiarid Institute, in the city of Campina Grande - PB. The research was carried out in two stages, the first one corresponded to the field survey, where from an RN the data was collected to generate the perimeter, as well as inside the dam using the GPS / GNSS equipment Trimble R4 L1 L2 RTK, the second step corresponded to the processing of data in the laboratory using geoprocessing tools, physical and logical computational support. The methodology used in the work provided the necessary data to generate Isolinhas map of the Preto reservoir, as well as the Table x Area x Volume, primordial for its monitoring. The traditional methodologies overestimated the volume of the Black weir by 40.74% and 17.29% according to the equations proposed by keling (1991) and Molle (1994) respectively, taking as real value the volume of 191,973.51 m³ obtained by methodology proposed by the work.