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[1]LI Fei,ZHANG Shuwen,YANG Jiuchun,et al.Investigation of Relations Between Gully and Ridge Direction[J].Research of Soil and Water Conservation,2015,22(01):1-4.

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Investigation of Relations Between Gully and Ridge Direction

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 01 Page number: 1-4 Column: Public date: 2015-02-28

Title:: Investigation of Relations Between Gully and Ridge Direction

Author(s):: LI Fei¹, ZHANG Shuwen^1,2, YANG Jiuchun², BU Kun², CHANG Liping², LI Tianqi³; 1. College of Earth Science, Jilin University, Changchun 130061, China;
2. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;
3. He’nan University, Kaifeng, He’nan 475200, China

Keywords:: gully; strike ridge; dip ridge; askew ridge

CLC:: S157

DOI:: -

Abstract:: Gully erosion is an important type of soil erosion, it attains more and more researchers’ concerns and researches. Based on the field survey data, DEM data and Google earth image data, we analyzed the relationship between gully and land ridge direction on different altitudes, slope gradients and slope shapes. The results showed that: (1) the land of askew ridge was most difficult to generate gully, the land of strike ridge is most easy to generate gully; (2) in the arable land where the altitude was less than 240 m, askew ridge can slow or prevent the generation of the gully, and strike ridge was most prone to gully erosion;in the arable land where the altitude was greater than 240 m, askew ridge was most prone to generate gully erosion, strike ridge wss most difficult to produce erosion gully; (3) when slope gradient was less than 2°, gully density of land whose ridge was dip ridge was the greatest, and the gully density of askew ridge was the least; when the slope gradients range from 2° to 6°, the strike ridge land was most prone to generation gully erosion because of the ‘channels function’; when the slope gradient was greater than 6°, gully most easily formed and developed in dip ridge land; (4) no matter what kind of slope shape was, gully density in strike ridge land was greater than in dip ridge land, and the askew ridge can effectively slow or even prevent the occurrence and development of gully.

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