DOI: 10.5593/sgem2012/s08.v2009


Wednesday 1 August 2012 by Libadmin2012

References: 12th International Multidisciplinary Scientific GeoConference, www.sgem.org, SGEM2012 Conference Proceedings/ ISSN 1314-2704, June 17-23, 2012, Vol. 2, 909 - 916 pp


Nowadays, almost every geographic discipline needs to measure geographical data at
the field. The same situation is in a fluvial geomorphology. The combination of
geomorphology and geoinformatics is a necessity in present time.
This article aims to present the latest photogrammetric techniques and procedures that
can be applied in fluvial geomorphology. Specifically the use of UAVs (Unmanned
Aerial Vehicle) is presented as a source of very accurate geographic data. Based on the
orthophoto and 3D terrain models which are generated from the stereo-pairs, it is
possible to clearly evaluate the morphological processes that occur in the river channel.
One of the conditions is that a very high resolution images are necessary.
This article presents specific procedures of preparing of the flight, processes during the
flight and subsequent data evaluation. The stereo photogrammetry methods have been
known for decades. For using in the UAV photogrammetry, these methods have to be
adapted for this specific purpose. The area of interest is a very dynamic part of the
Morava River (Czech Republic). In the protected area Litovelske Pomoravi there is a
lateral erosion one of a main process in the river channel. This paper also includes a
monitoring and evaluation of a meander. The meander has been photographing by the
UAV system in two phases: before and after destruction of the meander neck.
Photographing with the use of UAVs allows very quick, cheap and accurate
morphological evaluation of the fluvial forms. Recommended methods and procedures
have to be followed for obtaining the accurate results.

Keywords: UAV, remote sensing, photogrammetry, 3D model