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Using Drones to Assess Flood Damage at One of Europe's Largest Mines

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Read how Serbian company GeoGIS Consultants used a senseFly eBee drone (UAV/UAS) to assess flood damage at the Kolubara lignite pit. Explore the full project story: https://www.sensefly.com/fileadmin/user-cases/2015/senseFly-Case-Study-Mine-Flood-Mapping-Serbia.pdf

Published in: Technology

Using Drones to Assess Flood Damage at One of Europe's Largest Mines

  1. 1. Using drones to assess flood damage at one of largest mines
  2. 2. In May 2014, Serbia was hit by massive floods following the heaviest rainfall there since records began.
  3. 3. Several rivers broke their banks, completely flooding some of the .
  4. 4. The overflowing of the river Kolubara also flooded part of the Kolubara Mine Basin, approximately 45 km (28 miles) south of Belgrade.
  5. 5. The Kolubara pit is a huge 9 km2 (3.5 mi2) pit, part of an estimated 540,000,000 tonnes of lignite reserves in the Kolubara mining fields.
  6. 6. GeoGIS Consultants to supply accurate 2D orthomosaic images & digital terrain models (DTMs) of the flooded section of mine, in order to calculate the best method of draining the remaining water from the site.
  7. 7. And to plan a new river channel in order to change its direction and prevent such problems happening again in future.
  8. 8. So why did GeoGIS decide to work with a drone?
  9. 9. Speed #1
  10. 10. Using classical surveying methods, such as LiDAR or total stations, would have been slow, and therefore expensive. a terrestrial approach might have taken 3on-site teams around 2 months.
  11. 11. High-resolution imagery #2
  12. 12. Satellite images could have been an option, except that GeoGIS needed higher data resolution than they offered.
  13. 13. How did GeoGIS do it?
  14. 14. They planned their flight, setting the ground resolution to 7 cm (2.75 in) per pixel in the eMotion software.
  15. 15. They also set 25 ground control points, plus additional field points, using independent GPS receivers & continuous kinematics. These measurements enabled them to fine-tune using MicroSurvey CAD and ArcGIS.
  16. 16. 3 staff then performed 6 eBee flights. Each flight lasted approximately 33 minutes and captured between 180 and 250 images.
  17. 17. Since the client was very focused on getting their data quickly, GeoGIS managed to set all the GCPs, plan the flights and fly them all in one day.
  18. 18. The result?
  19. 19. The client received the data products it required within a week and was full of praise for GeoGIS
  20. 20. particularly with the data turnaround Aleksandar Milosavljevic, geodetic engineer, GeoGIS
  21. 21. 1 Flight planning 2 Setting GCPs 3 Flights 4 Data processing Point cloud filtering/classifying /cleaning Point cloud feature extraction & DTM creation Drawing preparation (CAD) PROJECT WORKFLOW
  22. 22. PROJECT STATISTICS
  23. 23. To learn more about drones in mining, visit: www.senseFly.com/applications/mining To read the full report of this project, visit: https://www.sensefly.com/fileadmin/user- cases/2015/senseFly-Case-Study-Mine-Flood- Mapping-Serbia.pdf And GeoGIS Consultants are online at: www.geogis.co.rs

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