Mesure du niveau d'eau par photogrammétrie à partir d'un drone

Details

Supervisors

Soares Frazao, Sandra

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil des constructions

Abstract

enThe three-dimensional modelling offered by photogrammetric techniques is historically related to the study of terrain topography. Many scientific fields benefit from this technology thanks to the many tech- nological improvements of the tools necessary to its implementation. For example, it is used in specialised areas such as medicine and archaeology. The field of fluvial hydraulics also uses these photogrammetric techniques and has already shown numerous conclusive results. These techniques are starting to be used in situ. One particular application deserves to be further addressed : the measurement of the water levels in natural rivers. Combining photogrammetry and the use of drones could allow fast, efficient and cheap measurements. More importantly, it would be non-intrusive, which constitutes a considerable advantage compared with the methods currently applied. This ideal is at the core of the research conducted throughout the year at the Université catholique de Louvain and thoroughly described in this paper. A method of water levels measurement is first developed with a test river. All the aspects of modelling and data analysis are covered, as well as the problems related to the terrain. This method is then tried with another river in order to better assess its strengths and weaknesses. The results are satisfactory and promising, and the measurements of water levels show an error of around 5 to 10%. This master’s thesis also tackles the shortcomings of the method and offers suggestions for possible future improvements.