Applying close range digital photogrammetry in soil erosion studies

Heng, B. C. Peter and Chandler, Jim H. and Armstrong, Alona (2010) Applying close range digital photogrammetry in soil erosion studies. The Photogrammetric Record, 25 (131). pp. 240-265. ISSN 0031-868X

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Abstract

Soil erosion due to rainfall and overland flow is a significant environmental problem. Studying the phenomenon requires accurate high-resolution measurements of soil surface topography and morphology. Close range digital photogrammetry with an oblique convergent configuration is proposed in this paper as a useful technique for such measurements, in the context of a flume-scale experimental study. The precision of the technique is assessed by comparing triangulation solutions and the resulting DEMs with varying tie point distributions and control point measurements, as well as by comparing DEMs extracted from different images of the same surface. Independent measurements were acquired using a terrestrial laser scanner for comparison with a DEM derived from photogrammetry. The results point to the need for a stronger geometric configuration to improve precision. They also suggest that the camera lens models were not fully adequate for the large object depths in this study. Nevertheless, the photogrammetric output can provide useful topographical information for soil erosion studies, provided limitations of the technique are duly considered.

Item Type:
Journal Article
Journal or Publication Title:
The Photogrammetric Record
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1700/1706
Subjects:
ID Code:
64242
Deposited By:
Deposited On:
26 Apr 2013 08:49
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jul 2020 01:12