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Remote Sens. 2014, 6(8), 7050-7080; doi:10.3390/rs6087050
Article

Small-Scale Surface Reconstruction and Volume Calculation of Soil Erosion in Complex Moroccan Gully Morphology Using Structure from Motion

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Received: 27 February 2014; in revised form: 16 July 2014 / Accepted: 21 July 2014 / Published: 29 July 2014
(This article belongs to the Special Issue Remote Sensing in Geomorphology)
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Abstract: This study presents a computer vision application of the structure from motion (SfM) technique in three dimensional high resolution gully monitoring in southern Morocco. Due to impractical use of terrestrial Light Detection and Ranging (LiDAR) in difficult to access gully systems, the inexpensive SfM is a promising tool for analyzing and monitoring soil loss, gully head retreat and plunge pool development following heavy rain events. Objects with known dimensions were placed around the gully scenes for scaling purposes as a workaround for ground control point (GCP) placement. Additionally, the free scaling with objects was compared to terrestrial laser scanner (TLS) data in a field laboratory in Germany. Results of the latter showed discrepancies of 5.6% in volume difference for erosion and 1.7% for accumulation between SfM and TLS. In the Moroccan research area soil loss varied between 0.58 t in an 18.65 m2 narrowly stretched gully incision and 5.25 t for 17.45 m2 in a widely expanded headcut area following two heavy rain events. Different techniques of data preparation were applied and the advantages of SfM for soil erosion monitoring under complex surface conditions were demonstrated.
Keywords: structure from motion; high resolution 3D model; multi-view stereo reconstruction; computer vision; photogrammetry; LiDAR; TLS; Morocco; soil erosion monitoring; gully erosion; volume calculation structure from motion; high resolution 3D model; multi-view stereo reconstruction; computer vision; photogrammetry; LiDAR; TLS; Morocco; soil erosion monitoring; gully erosion; volume calculation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Kaiser, A.; Neugirg, F.; Rock, G.; Müller, C.; Haas, F.; Ries, J.; Schmidt, J. Small-Scale Surface Reconstruction and Volume Calculation of Soil Erosion in Complex Moroccan Gully Morphology Using Structure from Motion. Remote Sens. 2014, 6, 7050-7080.

AMA Style

Kaiser A, Neugirg F, Rock G, Müller C, Haas F, Ries J, Schmidt J. Small-Scale Surface Reconstruction and Volume Calculation of Soil Erosion in Complex Moroccan Gully Morphology Using Structure from Motion. Remote Sensing. 2014; 6(8):7050-7080.

Chicago/Turabian Style

Kaiser, Andreas; Neugirg, Fabian; Rock, Gilles; Müller, Christoph; Haas, Florian; Ries, Johannes; Schmidt, Jürgen. 2014. "Small-Scale Surface Reconstruction and Volume Calculation of Soil Erosion in Complex Moroccan Gully Morphology Using Structure from Motion." Remote Sens. 6, no. 8: 7050-7080.


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