The contributions of the three-dimensional cartography for geomorphologic studies in small watersheds of the Chapada Diamantina, Brazil

Kaique Brito Silva, Neylor Alves Calasans Rego, Jonatas Batista Mattos, José Wildes Barbosa Santos

Abstract


This  research  is  mainly  aimed  to  identify  the  geological  and  geomorphological  structure  of watersheds  that  influence  some  of  the  processes  of  hydrology,  from  a  3D  model,  created  with tweens  numerical  terrain  models  and  satellite  images.  The  study  area  represented  located  in Northeastern  Brazil,  state  of  Bahia,  municipality  of  Lençóis  and  makes  reference  to  three watersheds. The  creation  of  the model was  based  on  the manipulation  of  altimetry  data  from  of images orbital’s  interferometric  the Topodata and SRTM projects, with  the  support of  the  images QuickBird,  plus  some  field  campaigns  of  investigation  and  use  of  the  Navigation  System  and Global positioning (GPS - GNSS).In possession of these data ,have been applied specific techniques of  remote  sensing  and  geoprocessing  in  GIS  with  ArcGIS  10.1  software.  With  the  use  of geostatistics tools, using filters and optimal arrangement of spectral bands was possible to extract a greater number of information physical and environmental and propose a three-dimensional model that simulates the shapes of the land in a watershed. The results show that with the modeling three-dimensional was  possible  to  identify with  a  good  accuracy  level,  the  slope,  types  of  topographic compartments, structural geology of faults through lineaments and deformation and the dynamics of runoff  and  infiltration  the hydrographic  system. With  such  a model  is  also  evident  in  the  intense correlation structural geology, compartments and hydrological processes.

Keywords


Geomorphology, Wathersheds, Chapa Diamantina

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DOI: https://doi.org/10.29150/jhrs.v6i1.22727

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