Simulation of the erosion and drainage development of Loess surface based on GIS

Chun Wang; Guoan Tang; Shanshan Ge; Zhanbin Li; Jieyu Zhou

doi:10.1117/12.712992

28 October 2006 Simulation of the erosion and drainage development of Loess surface based on GIS

Chun Wang, Guoan Tang, Shanshan Ge, Zhanbin Li, Jieyu Zhou

Proceedings Volume 6420, Geoinformatics 2006: Geospatial Information Science; 64201Z (2006) https://doi.org/10.1117/12.712992
Event: Geoinformatics 2006: GNSS and Integrated Geospatial Applications, 2006, Wuhan, China

Abstract

The research probes into the temporal-spatial process of drainage development of Loess Plateau on the basis of a carefully designed experiment. In the experiment, the development of a simulated loess watershed is tested under the condition of lab-simulated rainfall. A close-range photogrammetry survey is employed to establish a series of high precision and resolution DEM (Digit Elevation Model) of the simulated loess surface. Based on the established DEM, the erosion loss, the slope distribution, the topographic index , the gully-brink, and the drainage networks are all derived and discussed through comparison analysis and experimental validation. All the efforts aim at revealing the process and mechanism of erosion and drainage development of loess surface .This study demonstrates: 1) the stimulation result can effectively reflect the truth if those experimental conditions, i.e. loess soil structure, simulated rainfall, are adjusted in accord with true situation; 2) the remarkable character of the erosion and drainage up-growth of loess surface include the drainage traced to the source, the increased of the drainage's density, the enlarged of gully, the durative variety of multiple terrain factor's mean value and its distribution, such as slope and topographic index; 3) The slope spectrum is the more felicitous terrain factor for depicting the erosion and drainage development of loess surface, including the rule of erosion and evolution process. It is the new way and mean for studying the loess physiognomy.

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Chun Wang, Guoan Tang, Shanshan Ge, Zhanbin Li, and Jieyu Zhou "Simulation of the erosion and drainage development of Loess surface based on GIS", Proc. SPIE 6420, Geoinformatics 2006: Geospatial Information Science, 64201Z (28 October 2006); https://doi.org/10.1117/12.712992

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KEYWORDS

Soil science

Geographic information systems

Photogrammetry

Surface roughness

3D modeling

Computer simulations

Digital photography

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