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Nas ultimas decadas o desenvolvimento de novas tecnologias tem proporcionado um grande avanco da ciencia. Nas geotecnologias um dos maiores avancos foi o desenvolvimento de Veiculos Aereos Nao Tripulados (VANTs) que permitem a obtencao de dados de alta qualidade, tendo um grande potencial para o uso na geomorfologia. Neste trabalho, foram utilizados dados obtidos com aerolevantamento realizado com VANT para a analise morfometrica da Vocoroca do Areal em Cacequi-RS. Para tanto, foi realizado um voo com um VANT multirotor, Phantom 4 a uma altura de voo de 150m, posteriormente os dados foram processados atraves do algoritmo Structure from Motion. Em seguida, foram classificadas areas de avanco da vocoroca e calculados diversos parâmetros morfometricos. A vocoroca possui dinâmicas distintas em diferentes porcoes, tendo mais a montante areas de avanco mais alargadas e longas com profundidades menores, na porcao central um grande desenvolvimento vertical com grande volume erodido e na porcao mais a jusante areas de avanco com menor intensidade. Por fim, os dados obtidos permitiram a analise da morfometria da Vocoroca do Areal, fornecendo dados com extrema qualidade e acuracia. A utilizacao destas novas geotecnologias ainda tem muito a contribuir com a analise geomorfologica, principalmente nos mapeamentos em nivel de detalhe.  Abstract  NEW GEOTECHNOLOGIES APPLIED TO THE GEOMORPHOLOGICAL STUDY: EXAMPLE OF MORPHOMETRY OF THE AREAL GULLY, CACEQUI-RS  In the last decades the development of new technologies has brought about a great advance in science. In geotechnologies, one of the biggest advances was the development of Unmanned Aerial Vehicles that allow obtaining high quality data, with great potential for use in geomorphology. In this work, data obtained with aerial survey with UAV were used for the morphometric analysis of Vocoroca do Areal in Cacequi - RS. For this purpose, a flight was performed with a multirotor UAV, Phantom 4 at a flight height of 150m, afterwards the data were processed using the Structure from Motion algorithm. Afterwards, gully advance areas were classified and several morphometric parameters were calculated. The gully has different dynamics in different portions, having in the area upstream more extended and long areas of progress with smaller depths, in the central portion a large vertical development with a large eroded volume and in the downstream areas, with less intense advancement areas. Finally, the data obtained allowed the analysis of Vocoroca do Areal morphometry, providing data with extreme quality and accuracy. The use of these new geotechnologies still has a lot to contribute to the geomorphological analysis, mainly in the detailed mappings.

Novas geotecnologias aplicadas ao estudo geomorfológico: exemplo de morfometria da Voçoroca do Areal, Cacequi-RS