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[1]SUN Yu-zhu,ZHENG Fen-li,ZHANG Jiao.Analysis of Gully Erosion Development Based on LIDAR and GIS[J].Research of Soil and Water Conservation,2014,21(03):20-24.

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Analysis of Gully Erosion Development Based on LIDAR and GIS

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 03 Page number: 20-24 Column: Public date: 2014-06-28

Title:: Analysis of Gully Erosion Development Based on LIDAR and GIS

Author(s):: SUN Yu-zhu^1,2, ZHENG Fen-li^1,2, ZHANG Jiao^1,2; 1. College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Insitute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: LIDAR; GIS; gully erosion; cross-section analysis

CLC:: S157

DOI:: -

Abstract:: The combination of LIDAR and GIS is an important method in the quantitative research of slope-gully erosion of hill. In this study, the gully can be regarded as a composition of numerous sections, the variation characteristics of a plurality of continuous sections reflect the gully erosion development characteristics. Based on the soil loss data collected from 4 events of individual rainfall experiments measured by LIDAR, we used the GIS desktop software to turn the data to DEM, and then extract the width and length by cross-section analysis. The results showed that the position of 3.5 m to 5.5 m was the most active gully erosion site and the key position moved up as the rainfalls went on; the headwater erosion occurred in the early and medium term of the erosion, the collapse and erosion of the gully cliff were the main process. Cross-section analysis is an effective method to study the temporal and spatial patterns of gully erosion development, and provids a new way on the quantitative research of soil erosion.

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