Three‐dimensional scanning for measurement of bulk density in gravelly soils

Scanlan, C. A. and Rahmani, Hossein and Bowles, R. and Bennamoun, Mohammed (2018) Three‐dimensional scanning for measurement of bulk density in gravelly soils. Soil Use and Management, 34 (3). pp. 380-387. ISSN 0266-0032

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Abstract

The measurement of bulk density in gravelly soils (>15% soil particles >2 mm) is more time‐consuming than for other soils. The excavation method, usually employed for measurement of bulk density in gravelly soils, includes excavating a void and calculating volume of the void from the weight and density of the material (e.g. sand and plaster cast) used to fill the void. A 3‐dimensional (3D) scanning system was developed to measure the volume of the void created when using the excavation method. The 3D scanning system combined a time‐of‐flight camera (Kinect ™), the KinectFusion algorithm, MeshLab and a portable computer to produce a 3D model of the void or plaster cast. Experiments were completed at three field sites where soil gravel (>2 mm) content ranged from 35 to 71% to assess the performance of the system. The void volume measured using the 3D scanning system was highly correlated with measurements using the plaster cast method (r = 0.99). The cumulative time taken to measure soil bulk density using 3D scanning was significantly (P < 0.001) less than for the sand replacement at 0–10, 10–20, 20–30 and 30–40 cm depth. The faster measurement of subsurface bulk density is a significant advantage of the 3D scanning system; the time taken to measure bulk density to 40 cm in 10 cm increments using the 3D scanning system was about one‐third of the sand method.

Item Type:
Journal Article
Journal or Publication Title:
Soil Use and Management
Additional Information:
© 2018 Commonwealth of Australia. Soil Use and Management published by John Wiley & Sons Ltd on behalf of British Society of Soil Science
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1100/1102
Subjects:
ID Code:
127081
Deposited By:
Deposited On:
24 Aug 2018 08:42
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 11:29