Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Use of Photogrammetry in Monitoring Soil ErosionPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Paper number 022089, 2002 ASAE Annual Meeting . (doi: 10.13031/2013.10397) @2002Authors: T. Yamamoto, M. Otoshi, H. Hikami, G. Wen, M. Inoue, O. Uchida Keywords: Photogrammetry, Soil erosion, Monitoring system, Rainfall simulator, Three-dimensional algorithm In order to study the dynamics of variation in three-dimensional soil surface caused by water erosion, a new system equipped with an automated photogrammetry was developed in our laboratory. The system consists of two digital cameras, a rain simulator with a twelve meters high tower, and a set of computer image analysis program of three-dimensional algorithm. The system was tested using soil boxes where soils were packed with a 10o slope and under conditions of (1) rainfall, (2) surface water flow, (3) the combination of both rainfall and surface flows and (4) intermittent surface flow. The measurement error of the system was evaluated using standard deviation (SD) between the depth of soil erosion due to measurement and analysis. The average SD was 2.8 mm for a clay soil and 2.0 mm for a sandy loam soil under rainfall conditions. The SD was reduced to 1.9 mm in a heavy clay soil under intermittent surface flow condition. The measuring error was affected by the light halation, as well as soil color, amount of water stored on the soil surface. (Download PDF) (Export to EndNotes)
|