ESTIMATING A MATHEMATICAL FORMULA OF SOIL EROSION UNDER THE EFFECT OF RAINFALL SIMULATION BY DIGITAL CLOSE RANGE PHOTOGRAMMETRY TECHNIQUE

• Hossam El-Din Fawzy Kafrelsheikh University
• Ali Basha Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University,
• Marco N.Botross Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University,

Abstract

A new design of soil erosion and rainfall simulator is presented at this study as an attempt to deduce a mathematical formula of soil surface erosion phenomenon to describe the behavior of the sandy soil under the rainfall simulation, soil deformation such gullies and surface eroding rills are monitored by the Digital Close Range Photogrammetry (DCRP) technique that includes capturing digital images with a smart cellphone camera, and a Terrestrial Laser Scanner (TLS) to digitalize the soil surface as a point cloud data to produce Digital Elevation Models (DEM) with accuracy reaches 0.10mm with watershed, color relief, 3D surface model and contour maps. The results show that the mentioned methods give typical digital surface feature express especially of using geometrical adjustment that controls the orientation of the digital surface, it was clear that the digital imaging feature detection technology achieves accurate results despite its small cost compared to the laser scanner that the cost of imaging equipment and software are used did not exceed 12% if compared with the cost of the TLS method. As a result of the statistical observations, a simple mathematical formula was generated through digital photogrammetry method that describes the sandy soil behavior under the rainfall simulation as a relation between the eroding rate and the duration through the different gradient slopes.

Author Biographies

Ali Basha, Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University,

PhD in Structural Engineering (Geotechnical Engineering), 2014, Faculty of Engineering, Tanta University

Marco N.Botross, Civil Engineering Department, Faculty of Engineering, Kafrelsheikh University,

Bachelor of Construction Engineering, Hiegher institute of engineering and technology, Kafrelsheikh , Egypt

Published
2021-09-22
Section
Civil Engineering