Geotecnologias como subsídio à gestão de bacias hidrográficas: uma análise morfométrica na sub-bacia hidrográfica do rio Coreaú, Ceará

Abstract

This work aimed to characterize the morphometric of Coreaú river sub-basin. The studied area is located in the Northwest Cearense macroregion, between geographic coordinates 2 ° 59'15.34 "S / 41 ° 14'59.90" ° and 3 ° 58'59.52 "S / 40 ° 24'49.03" W. The parameters evaluated were: Channel Order, Bifurcation Ratio, Sinuosity, Main River Length, Channel Gradient, Basin Area, Basin Length, Circulation Index, Form Factor, Density of Rivers, Maintenance Coefficient, Maximum Basin Altitude Amplitude, Relief Ratio and Roughness Index. The MDE data collected by PALSAR sensor provided by the Alaska Satellite Facility - ASF was used as the data base. The data were processed and analyzed using QGIS software. The results showed that it is a 6th order basin, with a drainage transiting between the dendritic and the parallel patterns, poor drainage system with low drainage density, with a short time of water concentration and a low susceptibility to floods under normal precipitation conditions.