Using UAVs are cost efficient, flexible and multifunctional ways to
create geodata. The so-called drones are operating today in the fields
of mechatronic, aircraft industry, navigation and software development
after rapid technological developments. BFW explores within the project
BAUWEKA II potentials and limitations of utilizing this new technology
to study water catchment areas, protective forests and regions of risk
of descending avalanches.
Experts from the Department of Natural
Hazards carried out 14 experimental UAV flights in the Tuxer Alps
(Tyrol) at an elevation of 1800 m to 2700 m above sea level. 43.000
aerial images were shot in summer 2014 during the testing period. The
unmanned aerial vehicle used had a wingspread of 1.6 m and a weight of
2.5 kg and carried a modified system camera (Sony NEX-5).
software systems were used to process, evaluate and analyse the data. A
wide range of sensors, camera angles, flight tracks, analytic tools and
evaluation routines were tested.
Cost efficient monitoring
outcomes of the experiment are orthophotos and digital terrain models
with a resolution up to 2 cm. Images of near-infrared radiation of
forest sites were taken to assess the vitality of protective forests.
The promising outcomes show the manifold possibilities of applying this
new technology in evaluating natural hazard protection.
making on land use planning can be supported by this up to date
high-resolution data collected with UAVs (photos, videos). It offers
efficient ways to control safeguarding measurers against avalanches and
torrents. The project shows that UAVs are indeed a cost-efficient way to
regularly monitor protective structures.
|photo: drone in action|