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Proceedings Paper

Simulation of the erosion and drainage development of Loess surface based on GIS
Author(s): Chun Wang; Guoan Tang; Shanshan Ge; Zhanbin Li; Jieyu Zhou
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Paper 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.

Paper Details

Date Published: 28 October 2006
PDF: 12 pages
Proc. SPIE 6420, Geoinformatics 2006: Geospatial Information Science, 64201Z (28 October 2006); doi: 10.1117/12.712992
Show Author Affiliations
Chun Wang, Nanjing Normal Univ. (China)
Guoan Tang, Nanjing Normal Univ. (China)
Shanshan Ge, Nanjing Normal Univ. (China)
Zhanbin Li, Institute of Soil and Water Conservation (China)
Jieyu Zhou, Nanjing Normal Univ. (China)

Published in SPIE Proceedings Vol. 6420:
Geoinformatics 2006: Geospatial Information Science
Jianya Gong; Jingxiong Zhang, Editor(s)

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