Aplicação de técnicas de geoprocessamento na caracterização morfométrica de uma bacia hidrográfica situada no município de Silves, AM

Abstract

The objective of this work was to characterize the morphometry of the basin of the rivers Itabani and Sanabani, located in the municipality of Silves. Were used for both, the project data Shuttle Radar Topographic Mission (SRTM) integrated and processed in the Geographical Information System (GIS). The Digital Elevation Model (DEM) was processed using the tool TauDEM, a complement of QuantumGIS software (QGIS) 2.18 of free access. Thus, data were extracted from the srtm model allowing the automatic delineation of the basin. Based on Digital Elevation Model Hidrograficamente conditioning (DEMHC), the surface hydrological processes have been recreated, thus obtaining - different physical characteristics, such as: the basin area, perimeter, coefficient of compactness, form factor, index of circularity, slope, altitude, density of drainage and order of watercourses. Later, as a result we obtained the following extraction of the morphometric parameters, Area (624.76 km²), perimeter (216.54 Km), fluvial hierarchy (6th order), compactness index (2.43), index of circularity (0.17), form factor (0.32), average altitude (81.45 m), altimetric amplitud (135 m) and drainage density (1.54 km/km²). The use of qgis in the development of this work together with the complement TauDEM proved to be an efficient tool in the manipulation of data extracted from SRTM model, thus enabling the simulation of physical parameters of the basin. In addition, it is a viable alternative for obtaining data with minimizing costs and time.