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The edafoclimatic conditions of the Brazilian semiarid region favor the water loss by surface runoff. The state of Ceara, almost completely covered by semiarid, has developed public policies for the construction of dams in order to attend the varied water demand. Several hydrological models were developed to support decisive processes in the complex management of reservoirs. This study aimed to establish a methodology for obtaining a georeferenced database suitable for use as input data in hydrological modeling in the semiarid of Ceara. It was used images of Landsat satellite and SRTM Mission, and soil maps of the state of Ceara. The Landsat images allowed the determination of the land cover and the SRTM Mission images, the automatic delineation of hydrographic basins. The soil type was obtained through the soil map. The database was obtained for Jaguaribe River hydrographic basin, in the state of Ceara, and is applicable to hydrological modeling based on the Curve Number method for estimating the surface runoff.

engenharia agrícola

Georeferenced database generation with the purpose of hydrologic molding in reservoirs of the hydrographic basin of Jaguaribe river in the state of Ceará, Brazil