[1]GUO Xiaoxue,TIAN Peng,LIU Wenmin,et al.Assessing Eroded Gully on Embankment of Highway in Dulan-Geermu Section of Qinghai-Tibet[J].Research of Soil and Water Conservation,2021,28(04):42-47.
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Assessing Eroded Gully on Embankment of Highway in Dulan-Geermu Section of Qinghai-Tibet
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 04
Page number:
42-47
Column:
Public date:
2021-08-10
- Title:
- Assessing Eroded Gully on Embankment of Highway in Dulan-Geermu Section of Qinghai-Tibet
- Keywords:
- embankment; rill erosion; influencing factors; Qinghai-Tibet highway
- CLC:
- S157
- DOI:
- -
- Abstract:
- In order to probe into the spatial features of gullies along the highway and the influence factors in alpine and high-altitude regions, the 16 samples of Qinghai-Tibet highway from Dulan to Geermu were selected as research objects. For each segment, the gully length, density and depth were measured for each segment with 60 m. The spatial variations of these variables were analyzed to understand the changes in the characteristics of the gullies along the highway.(1)Gully volume, average depth and maximum depth showed similar spatial pattern. The values of the three indicators in the S2711 to S2595 samples near Geermu were relatively large, the values of the middle part of S2575 to S2465 samples were relatively small, an upward trends were detected among S2437 to S2395 samples near Dulan.(2)The 16 samples were divided into two categories by clustering analysis. The first category included 8 samples along the middle road from Geermu to Dulan, which were weakly eroded sections. The second category included 6 samples near Geermu and 2 samples near Dulan, which were highly eroded sections.(3)The correlation analysis was undertaken between eroded gully indices and the influence factors in the study area. The results showed that a good correlation existed between volume of eroded gully and rainfall intensity. The higher the rainfall intensity was, more gully erosion yielded. According to the characteristics of erosion on slope of highway in alpine region, three conservation measures such as reducing slope, improving drainage and conserving the embankment of the highway are proposed.
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Last Update:
2021-08-20