We would like to use 3D scanning laser to measure erosion rates in badlands and to measure the volume of retained sediment by check dams. First aff all, we would like to know something about the accuracy of the method. Has anyone used it?
Yes, my PhD investigation is focused in applying the LIDAR for characterizing fluvial outcrops. The method is highly accurate (the order of few cm) so you will be able to detect and quantify subtle modifications of any geological surface by comparing two point clouds acquired at different times.
Yes, see the paper by Rodriguez-Lloveras et al (2014) presented at the bianual national conference on Geomorphology, (Cáceres), which you can find under my RG page.
Thank you Rubén and Albert. We would work with terrestrial scanner laser. I don´t believe we could apply LIDAR. We are looking for an accuracy lower than 1 cm.
Albert, I´ve downloaded the Rodríguez-Lloveras paper the last week. It is really interesting.
Yes, you can see some papers about the use of TLS in Badlands. One of the most interesting is Vericat et al., published in Catena (Maybe you can find in the Catena Web but Idon't know if it has already published).
To get below 1cm, you might consider a phase shift scanner. Or maybe think about sfm as an alternative to lidar. However, of course it depends on the size of the investigation area and your referencing, if you perform multi-temporal measurements.
Thank you Estela I am going to look for the Vericat et al. paper in Catena
UAV and TLS is really usefull for erosion analysis.
for example
Article Hydrology and Water Resources ESTIMATION OF CHANGES IN EROSI...
Thank you very much for your answer, I am going to read your paper.
Finally, we applied TLS in a recent work. It is published in Land Degradadtion and development Journal. Tittle: FINAL ANALYSIS OF THE ACCURACY AND PRECISION OF METHODS TO CALCULATE THE SEDIMENT RETAINED BY CHECK DAMS
http://onlinelibrary.wiley.com/doi/10.1002/ldr.2778/epdf
Thank all of you by your comments and recommended papers.
I've worked during my master with UAV and I've got precisions around 0.5 - 1.0 cm for gully erosions.
I can recommend UAV surveys because sometimes the placement of TLS device can be problematic. UAV based Structure-from-Motion photogrammetry can provide high resolution point clouds also.
We have published one paper about this:
Article UAS photogrammetry and object-based image analysis (GEOBIA):...
- Badges
- Science topic
- Similar topics
- Geoscience
- Asia
- India