Geomorphometric assessm ent and land use and occupation in the Aguiar River hydrographic basin, Paraíba, Brasil: an environmental approach based on GIS
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.004.0033Keywords:
Water Resources, Semiarid, GeoprocessingAbstract
The geomorphometric characterization, as well as the evaluation of the use and occupation of the watershed basins, are essential approaches for the understanding of the hydrological behavior of these natural cuts, especially when associated with the Geographic Information System (GIS). In this context, the present study aims to evaluate the geomorphometric parameters and the use and occupation of the soil in the Rio Aguiar hydrographic basin (BHRA), through the GIS environment. To conduct the study, the free software QGIS was used, defining the boundary of BHRA through Shuttle Radar Topography Mission (SRTM) images and quantifying the geomorphometric aspects. As a result, an area of 1096.37 Km² was found, a perimeter of 169 km, a drainage density of 0.460 Km.Km-², average slope of 15.6%, concentration time of 11.36 hours, river hierarchy fourth-order and altimetric amplitude of 353 m, in a basin with 36.8% of its anthropized area. Through these results, it is concluded that the predominance of natural vegetation and the elongated shape of BHRA indicate that the study area is not subject to flooding and, consequently, lower sediment production during runoff, as well as the approach in GIS environment identified areas at variance with the current Brazilian Forest Code.
Downloads
Downloads
Published
Issue
Section
License
The CBPC - Companhia Brasileira de Produção Científica (Brazil CNPJ: 11.221.422/0001-03) the material rights of the published works. The rights relate to the publication of the work anywhere in the world, including rights to renewals, expansions and dissemination of the contribution, as well as other subsidiary rights. All electronically published works may subsequently be published in printed collections under the coordination of this company and / or its partners. The authors preserve the copyright, but are not allowed to publish the contribution in another medium, printed or digital, in Portuguese or in translation.